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Review of Covalent Chemical Control Methods for Graphene Oxide

Review of Covalent Chemical Control Methods for Graphene Oxide

Jun 29,2022

Graphene has attracted extensive research interest in many fields due to its unique physical and chemical properties. However, its low solubility in most organic solvents and water, as well as its tendency to aggregate, prevent full utilization of its properties. Graphene oxide (GO) is an alternative material with high diffusivity in polar solvents. Graphene oxide contains rich oxygen-containing groups, mainly epoxides and hydroxyls, which can be further chemically derivatized. However, due to the high reactivity of graphene oxide, several reactions may occur simultaneously, usually leading to runaway graphene oxide derivatives. Recently, a research team led by Professor Cécilia Ménard-Moyon from the University of Strasbourg in France published a review article on the Nature Reviews Physics on the topic of Controlling covalent chemistry on graphene oxide, systematically discussing the chemical reactivity of graphene oxide and the problems that hinder the precise control of its functionalization, such as its instability, lack of clear chemical structure and the presence of impurities. The article focuses on the selective derivatization strategy of oxygen-containing groups and C = C bonds, as well as the challenge of unambiguously characterizing the final structure. This review not only briefly reviews the application of graphene oxide materials, links its chemistry and nanostructure with the required physical properties and functions, but also points out the future direction of improving the chemical control of graphene oxide. For more than 15 years, graphene has attracted interest in various fields due to its unique optical, electrical, thermal and mechanical properties. However, the low dispersibility of graphene in most organic solvents and water and its aggregation limit its processability. In addition, the sp2 basal plane of graphene is relatively inert, which inhibits its covalent functionalization, thus limiting its application range. In contrast, the oxidized form of graphene-graphene oxide (graphene oxide)-is highly dispersible in many solvents, and the rich oxygen-containing moiety provides a handle for extensive chemical derivatization. These properties facilitate processing and make the production of graphene oxide materials inexpensive and scalable. Graphene oxide is composed of flexible two-dimensional graphite flakes of atomic thickness with lateral dimensions on the nanometer to micrometer scale. The surface of graphene oxide is modified by oxygen-containing groups: many epoxide and hydroxyl (-OH) moieties are mainly located on the basal plane, while some carboxyl (-COOH) groups are present at the edges. It must be understood that graphene oxide is not a single compound, but a heterogeneous class of materials. The physical and chemical properties and corresponding applications of graphene oxide are defined by its composition and structure at different scales (Figure 1a). The properties depend on chemical details (e. g., the level of oxidation, the proportion and location of oxygen-containing groups, and the number of remaining non-oxygen groups), the density of defects and nanopores, and the distribution and aggregation of functional groups. The properties of the graphene oxide can be further modified by changing the microstructure, I .e., the size distribution and relative arrangement of the flakes (e. g., liquid suspended flakes, hydrogels, or laminates). This layered structure determines the optical and electrical properties of graphene oxide-based materials, as well as liquid, ion and gas transport properties. The chemical modification of graphene oxide provides an opportunity to controllably change the properties of related materials, improving their performance in many applications, including in environmental and energy-related fields, polymer composites, sensing, filtration, catalysis and Nanopharmaceuticals and other fields. However, since graphene oxide is unstable under heat and in the presence of strong bases, functionalization must be carried out under neutral and mild conditions to avoid dehydration and reduction of graphene oxide. Due to the relatively high reactivity of oxygen-containing groups in graphene oxide, multiple reactions may occur simultaneously during the functionalization process, which may lead to side reactions and synthesis of materials with unclear composition. Thus, controlled functionalization of graphene oxide requires a synthetic strategy and accurate characterization of functionalized materials requires technology. In this review, the article outlines the chemical reactivity of graphene oxide and discusses the factors that hinder the precise control of graphene oxide functionalization; these include the lack of a clear chemical structure of graphene oxide macromolecules, its thermal instability, Incompatibility with strong bases and possible impurities. The article details the selective covalent derivatization of different oxygen-containing groups and C = C bonds, focusing on facilitating the understanding of reactivity rather than mechanical details. The discussion in this article is limited to covalent chemistry because it provides graphene oxide conjugates that are more stable than graphene oxide conjugates produced by non-covalent interactions. Failure to grasp the heterogeneity of Go material often leads to erroneous conclusions and erroneous communication in the literature. Finally, the structure-function relationship of functionalized graphene oxide is discussed in the application examples of environment and energy related fields. Graphene oxide has been developed for various applications in different fields, from sensing, catalysis and composite materials to environmental science, energy and biomedicine. The chemical composition of graphene oxide affects its properties, and the covalent grafting of molecules on its surface represents a valuable strategy to adjust and improve the properties of materials to suit different applications. The article introduces examples of the use of functionalized graphene oxide in most application fields (ie, environmental and energy-related fields), and focuses on the study of functionalization of graphene oxide under mild conditions and high chemical selectivity. Environmental Applications In order to improve sustainability and energy efficiency, investigations have been conducted on the environmental application of graphene oxide in drinking water purification; membrane separation processes, including seawater desalination; and the collection of osmotic energy. The function and performance of graphene oxide-based materials in environmental applications, especially in the development of separation membranes, depends not only on the chemical properties of graphene oxide, but also on its hierarchical structure. A separation membrane made of graphene oxide consists of horizontally aligned graphene oxide flakes and nanosheets, stacked into a layered structure that is stable in water. Once hydrated, the film swells and the nature of the functional groups determines the interlayer distance between the lamellae. As the solution permeates between the sheets, it flows in a percolation path between the separated functional groups along the graphene oxide basal plane until it snakes through the membrane. The frictionless surface of the pristine graphene region facilitates ultrafast transport of water. The selectivity of the membrane is based on the size and dewaterability of the hydrated ion (determined by the interlayer distance), charge selectivity (through protonatable functional groups) and chemical affinity. For the accepted pressure-driven desalination (reverse osmosis) technology, graphene oxide membranes have not yet reached the performance of traditional thin-film composite membranes, mainly because of the poor ion/water selectivity of graphene oxide. Attempts to reduce the interlayer distance between graphene oxide flakes by physical confinement and chemical cross-linking have not significantly improved reverse osmosis performance. However, due to its high charge selectivity, graphene oxide membranes may still dominate in two emerging technologies: desalination by electrodialysis and energy harvesting by reverse electrodialysis. Other prominent applications of graphene oxide membranes are organic solvent separation and pervaporation, which is a membrane evaporation process that separates organic-water and organic-organic mixtures. Energy Applications Due to the increasing demand for energy, fuel cells have attracted great interest because they are an environmentally friendly and efficient alternative energy source suitable for many applications. There are numerous articles on the use of functionalized graphene oxide in energy-related applications. In the article, the authors highlight several examples where the functionalization of graphene oxide has been well controlled. Proton exchange membrane (PEM) fuel cells are usually made of polyelectrolytes, which convert chemical energy into electrical energy through an electrochemical reaction between hydrogen and oxygen, while producing water and heat. The performance of proton exchange membranes depends to a large extent on their proton transport capacity. Therefore, a lot of research work has been invested in the development of proton exchange membranes with high proton conductivity. In this regard, there are mainly two methods: modifying existing polyelectrolytes and proton exchange membranes with additives, or synthesizing new polyelectrolytes to design new proton exchange membranes. For example, graphene oxide functionalized with Nafion by an atom transfer radical addition reaction is used as an additive for Nafion-based composite proton exchange membranes for fuel cells. Compared with Nafion membrane, the composite shows higher proton conductivity. The improvement in performance is attributed to the aggregation of the sulfonic acid groups of the Nafion chains grafted onto graphene oxide, forming proton-conducting domains. As analyzed in this paper, the relatively low production cost of graphene oxide, its dispersibility in various solvents including water, and its tunable surface chemistry make graphene oxide an attractive building block for multifunctional materials. In many applications, maintaining the intrinsic properties of graphene oxide is critical. For example, the high density of oxygen-containing groups in graphene oxide leads to high water dispersibility and high proton conductivity and water retention. Therefore, the derivatization of graphene oxide must be well controlled to impart new properties, and the functionalized samples must be thoroughly characterized. These tasks are complicated because the chemical structure of graphene oxide has not been fully elucidated, and the level of defects and the ratio of different oxygen-containing groups may vary depending on the synthesis scheme and the source of the graphite. All structural models focus on the fact that the basal plane of graphene oxide is rich in epoxides and hydroxyl groups, which can be functionalized to adjust the properties of the material, while the carboxyl groups are only present in small amounts. Although great progress has been made in the functionalization of graphene oxide, the chemical properties of graphene oxide are not always well controlled and are not fully understood. The article points out that the reactivity of graphene oxide is determined by a complex set of factors, because the oxygen-containing groups are located in an abundant and unusual chemical environment, and significant in-plane distortion and strain in the crystal lattice will increase their reactivity. Due to the different oxygen-containing groups on the surface of graphene oxide and the high chemical reactivity of certain reagents, simultaneous reactions may occur to produce uncontrolled graphene oxide derivatives. The main purpose of this review is to clarify the chemical reactivity of graphene oxide and provide key and useful suggestions on how to promote its functionalization without reducing materials that will affect its performance. The article emphasizes the importance of chemoselective reactions, which allow one specific oxygen-containing group or C = C bond to be derivatized without affecting other moieties, thus providing the possibility for controlled multi-functionalization of graphene oxide. The simplest and most effective strategies involve epoxides and hydroxyls because of their abundance. In this review, the article mainly describes reactions that do not require thermal activation and proceed at room temperature. When functionalizing graphene oxide, it is important to use mild reaction conditions, particularly in terms of temperature and pH when needed, to avoid removal of labile oxygen-containing groups and degradation of the graphene oxide framework.

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July 1 Party Building Festival | Graphite Valley Launching "Remembering Revolutionary Martyrs and Promoting Patriotism" Theme Day

July 1 Party Building Festival | Graphite Valley Launching "Remembering Revolutionary Martyrs and Promoting Patriotism" Theme Day

Jul 01,2022

In order to solemnly commemorate the 101 anniversary of the founding of the Communist Party of China, encourage and guide party members and cadres to carry forward the heroic spirit, inherit the red gene, and create a strong atmosphere for celebrating "July 1", on July 1, the CPC Heilongjiang Graphite Valley Industry Group and Harbin Longene carbon material Joint Committee organized all party members and cadres to visit the Northeast Martyrs Memorial Hall and carry out party day activities with the theme of "remembering revolutionary martyrs and carrying forward patriotism. Our party members and cadres fully understand history, remember history, inherit the red spirit, and cultivate patriotic feelings. The Northeast Martyrs Memorial Hall is one of the earliest revolutionary memorial museums established in my country. It mainly displays the representative deeds of martyrs who died in the Northeast during the War of Resistance Against Japan and the War of Liberation. Its building is the former site of the Puppet Manchukuo Police Hall during the Japanese and Puppet Period. Many Communists and patriots were detained and tortured here. The famous anti-Japanese heroine Zhao Yiman was tortured by the enemy here. In the exhibition hall, everyone reviewed the deeds of Yang Jingyu, Li Zhaolin, Zhao Shangzhi, Zhao Yiman, Chen Hanzhang and other revolutionary martyrs, and deeply realized the indelible strong will of the martyrs on the road of the Chinese revolution. Shuttling between the exhibition halls, the precious historical photos on the walls seem to make time go back to the era of bloody struggle and succession, and everyone is deeply infected and shocked. During the activity, under the guidance and explanation of the commentator, the comrades visited the exhibition halls of the memorial hall in an orderly manner to learn about the typical deeds of the martyrs in different periods in Northeast China, and personally felt that during those arduous years, the Chinese Communists made great contributions to resist aggression and national liberation, and everyone present was baptized and sublimated in spirit, deeply feeling that the revolutionary spirit of the revolutionary martyrs who are loyal to serve the country, are not afraid of hardships and dangers, and have the courage to devote themselves has inspired everyone. Our party members have expressed: We must cherish today's happy life, work harder, and keep in mind the party's purpose. The party members and cadres of our company deeply look back at the years of the Northeast Anti-Japanese Alliance's arduous and arduous battles, deeply understand the family and country feelings of the revolutionary ancestors who promised the party and served the country with loyalty, and deeply cherish the noble spirit of the heroes of the Anti-Japanese Alliance who were not afraid of hardships and dangers and were not afraid of sacrifice. In front of the "Immortal Name" Martyrs Wall, Xu Qin and others paid tribute to the martyrs and expressed their deep memory of the revolutionary martyrs to Yang Jingyu, Zhao Shangzhi, Zhao Yiman and other martyrs. Finally, our party members and cadres stood in front of the party flag and raised their right fists, solemnly swore, expressed their love and loyalty to the party organization with sonorous vows, strengthened their ideals and beliefs, remembered the mission of party members, never forgot their original aspirations, and forged ahead.

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Preparation of Flexible Ferromagnetic Graphene Quartz Fiber Fabric with Super-large Size and Ultra-wideband Strong Electromagnetic Shielding Properties

Preparation of Flexible Ferromagnetic Graphene Quartz Fiber Fabric with Super-large Size and Ultra-wideband Strong Electromagnetic Shielding Properties

Jul 07,2022

Liu Zhongfan of Peking University and Beijing Graphene Research Institute-The research team has made important progress in the preparation and application of flexible graphene quartz fibers. The team reported for the first time the use of roll-to-roll chemical vapor deposition (CVD) technology to batch prepare large-area, lightweight, flexible, ferromagnetic graphene quartz fiber fabric (FGQF) with ultra-wideband strong electromagnetic shielding effectiveness. The relevant results are titled "Ultra-broadband strong electromagnetic interference shielding with ferromagnetic graphene Quartz fabric. In this work, an oversized flexible ferromagnetic graphene quartz fiber fabric (FGQF) was first prepared using a roll-to-roll CVD batch growth system. By precisely controlling the nitrogen doping type of graphene, the preparation of ferromagnetic graphene layers with high conductivity (3906 S · cm-1) and high magnetic response (saturation magnetization of 0.14 emu · g-1 at room temperature) was achieved (Figure 1a). At the same time, the special woven structure of FGQF fabric introduces additional multiple reflection and multi-channel absorption of electromagnetic waves into the material, which further enhances the electromagnetic shielding effectiveness of the material. The 1 mm thick FGQF exhibits a superior shielding effectiveness of 107 dB at an ultra-wide band of 1-18 GHz, while achieving high EMI shielding efficiency and a wide EMI immunity band (Figure 1c). Using the graphene roll-to-roll continuous CVD growth system independently developed by the team (Figure 1b), the large-scale preparation of FGQF was realized, with a single batch preparation size of up to 10 × 0.5 m2 (Figure 1d), which provides an important basis for the practical application of materials. Based on the high conductivity, ferromagnetism and special woven structure of FGQF, when the electromagnetic wave reaches the surface of the material, it interacts with the free carriers on the surface of graphene, and part of the electromagnetic wave is reflected. By optimizing the impedance matching at the air-material interface, the remaining electromagnetic waves will enter the inside of the FGQF, match with the FGQF conductive network, and produce multiple internal reflections in its woven structure. Therefore, the ferromagnetic graphene layer with high conductivity and high magnetic response can achieve effective absorption and attenuation of electromagnetic wave energy (Figure 2a). The shielding mechanism of single ferromagnetic graphene quartz fiber (about 7 μm in diameter) in FGQF fiber cloth is analyzed in detail. The electromagnetic wave is reflected multiple times in the adjacent fiber array, and the multilayer ferromagnetic graphene can efficiently absorb the reflected electromagnetic wave, further attenuate the electromagnetic wave energy, so as to obtain high electromagnetic shielding effectiveness.

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Warmly Congratulate Graphite Valley on Winning the Third Prize in the Growth Group of the 5th Harbin Innovation and Entrepreneurship Competition

Warmly Congratulate Graphite Valley on Winning the Third Prize in the Growth Group of the 5th Harbin Innovation and Entrepreneurship Competition

Jul 25,2022

In order to thoroughly implement the innovation-driven development strategy, cultivate and develop new kinetic energy, further stimulate the enthusiasm for innovation and entrepreneurship in Bingcheng, support the innovation and development of small and medium-sized enterprises, and provide strong scientific and technological support for building an "innovation leading city", Harbin held the 11th China Innovation and Entrepreneurship Competition Heilongjiang Division and the 5th Harbin Innovation and Entrepreneurship Competition from July 14 to July 21. Since the start of the competition, it has received extensive attention from all walks of life. A total of 119 high-quality projects meet the requirements of the competition. The participating projects cover new generation information technology, biomedicine, high-end equipment manufacturing, new materials, new energy and other high-tech fields, gathering new achievements, new technologies and new ideas in various fields. The electronic scoring system was adopted throughout the competition, and the Harbin Notary Office was invited for notarization to ensure the openness, fairness and justice of the process and results of the competition. After online and offline demonstration, defense, expert questions, judges' scoring and other methods in the preliminary and final competitions, according to the unified scoring rules of the competition system, Graphite Valley won the third prize in the growth group for its new generation of ultra-high pressure homogenizer project. Liu xiukuan, member of the Party group and deputy director of Harbin Science and Technology Bureau, extended warm congratulations to the award-winning enterprises on behalf of the organizers. Leaders of relevant units such as the Provincial Department of Science and Technology, the Municipal Science and Technology Bureau, the Municipal Education Bureau, the Municipal Human Resources and Social Security Bureau, the Municipal Youth League Committee, and the Municipal Women's Federation attended the award ceremony and presented awards to the award-winning representatives. As an innovative high-tech industrial group focusing on the fields of new energy and new materials, focusing on the R & D, production and sales of graphite, graphene, carbon materials and their applications, since its establishment, it has been based on scientific development and focused on independent innovation. Adhering to the innovative concept of "science and technology changes the world, innovation leads the future", and constantly pursues technology, product, service and management innovation; in the future, Graphite Valley will build and build a complete ecological block chain of graphite (ene) new material industry through industrial layout, scientific innovation, and combined with the capital market, promote industry development, give full play to Longjiang's advantages, create industrial highlands, grasp development opportunities, and adhere to Innovation leads, determined to become a leader in the new energy and new materials industry, to promote the rapid and healthy development of strategic emerging industries, and to contribute to the sustainable economic and social development.

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GMG leads graphene aluminum ion battery innovation

GMG leads graphene aluminum ion battery innovation

Jul 25,2022

Australia's Graphene Manufacturing Group (GMG) announced that the trial production and testing plant for graphene aluminum-ion batteries has been put into operation, and button batteries, a potential competitor to lithium-ion batteries, have also been manufactured. Craig Nicol, Managing Director and CEO of GMG Group, said, "the commissioning of the battery pilot plant is an important milestone for GMG Group, which not only means that we can develop, manufacture and test our own G + Al button cells, but also promote the commercial development of G + Al batteries, cooperation with future customers, and further strengthen our expertise." The company does not mine graphite, but produces graphene by cracking methane. The company used a patented process to design a method to produce high-quality, low-cost, scalable, adjustable, non-polluting or low-polluting graphene. While the graphene produced by GMG can be used in multiple industries, the company's initial focus was on developing applications for energy saving and energy storage solutions, and its vision is now being realized through the pilot plant for the production of graphene-based aluminum-ion batteries. A potential competitor to lithium-ion batteries, this globally unique battery was developed by GMG Group, the University of Queensland Institute of Bioengineering and Nanotechnology and UniQuest companies and is now in production at scale. GMG Group's laboratory tests show that the G + Al battery energy storage technology has a higher energy density and higher power density than the current market-leading lithium-ion battery technology. The detailed technical parameters published by the company show that the power density of up to 7000 Wh/kg was confirmed by tests during 3000 cycles of experiments, including charging to full charge and discharging to almost complete loss of power at different charging rates. In addition, the test results show that the cycle rate during the test period is very high, and its charging rate is as high as 66 coulombs (ie, amps/s), and the performance degradation is negligible. In contrast, lithium-ion batteries have a charging rate of 600 to 100 cycles. Lower, performance is usually reduced to 60% of the original capacity. In the real world, this means that G + Al batteries have a longer lifespan and a shorter charging time. Professor Alan Rowan of the University of Queensland said, "Tests have shown that rechargeable graphene aluminum-ion batteries have a lifespan of three times that of current mainstream lithium-ion batteries, and the higher power density means that they can be charged 70 times faster. This battery can be charged multiple times without performance degradation, is easier to recycle, and reduces the possibility of harmful metals leaking into the environment." These parameters make graphene aluminum batteries a potential choice for electric vehicles and electronic devices, because battery life, charging time and durability are basically important factors to consider for all applications.

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Greenhouse Gas Emissions Verification Report 2019-2021

Greenhouse Gas Emissions Verification Report 2019-2021

Aug 11,2022

According to the requirements of the Interim Measures for the Administration of Carbon Emission Trading (Ministry Decree No. 19) and the Notice on Key Work Related to the Reporting and Management of Greenhouse Gas Emissions of Enterprises in 2022 (Environmental Affairs Office Climate Letter No. 2 022 111), reliable data quality assurance is provided for the effective implementation of carbon quota issuance and carbon trading.

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Carbon Footprint Report

Carbon Footprint Report

Aug 11,2022

Climate change is an important challenge facing mankind in the 21st century. To this end, countries have taken active actions. The United Nations Climate Negotiations Conference in Copenhagen promised that countries will follow science and achieve emission reduction targets on a fair basis. China has also actively taken measures to promote energy conservation and emission reduction, formulated relevant policies, and promised to reduce the carbon emission intensity per unit of GDP by 65% in 2030 compared with 2005

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Corporate Social Responsibility Report 2021

Corporate Social Responsibility Report 2021

Aug 11,2022

Brief introduction to the report: the report reviews the company's social responsibility work in 2021, and discloses the company's philosophy, practice and achievements in fulfilling its economic, environmental and social responsibilities.

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Warmly welcome the leaders of Tongling City, Anhui Province to visit and investigate Shimo Valley Industry Group.

Warmly welcome the leaders of Tongling City, Anhui Province to visit and investigate Shimo Valley Industry Group.

Aug 12,2022

On the morning of August 12, 2022, he Tian, member of the standing Committee of Tongling municipal party Committee and executive vice mayor, led a team to visit graphite valley industry group. company chairman Fang zhenhui, general manager Liu zhiliang, deputy general manager he bin and other visiting leaders visited the company's graphene new materials research institute, graphite science and technology exhibition hall, graphene and carbon nanotube intelligent workshop and the company's intelligent equipment workshop, and held discussions and exchanges on specific work. During the visit, Fang Zhenhui, chairman of the company, focused on the development of the graphite industry, the company's development history, research and development background, product innovation and practical results in related fields. After the visit, the two sides held a symposium. At the meeting, Chairman Fang Zhenhui first made a speech and expressed a warm welcome to the leaders of Tongling City to visit our company for research. Later, Xue Hongyan, manager of our company's carbon nanotube project, introduced the company's general situation, business sector and development strategy in a simple way, focusing on the development of the carbon nanotube project, which was highly appraised by the leaders of Tongling City and fully affirmed our company's position in the industry. At the same time, Vice Mayor He Tian focused on the location advantages and resources of Tongling City, hoping that the two sides can carry out in-depth cooperation on related projects in the future, for the development of graphite industry. At the meeting, the host and guest held warm and friendly discussions on topics related to the carbon nanotube project. The two sides talked about achievements, innovation and development, and further unified their opinions. Chairman Fang Zhenhui said that the Graphite Valley Industry Group has entered a period of rapid development and has determined the strategic goal of "one small step a year, one big step in three years, and five years on the platform to build a tens of billions of listed companies. In the future, Graphite Valley Industry Group will build and build a complete ecological blockchain for the graphite (ene) new material industry through industrial layout, technological innovation, and combined with the capital market, promote industry development, create industrial highlands, grasp development opportunities, and adhere to innovation leadership. Determined to become a leader in the new energy and new material industries, to promote the rapid and healthy development of strategic emerging industries and contribute to the sustainable economic and social development.

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Warmly welcome the leaders of the Provincial Communications Investment Group and the Provincial Graphite Association to visit and investigate the Shimo Valley Industry Group.

Warmly welcome the leaders of the Provincial Communications Investment Group and the Provincial Graphite Association to visit and investigate the Shimo Valley Industry Group.

Aug 13,2022

On the morning of August 13, 2022, Zhang Wensheng, deputy chief engineer of Heilongjiang Transportation Investment Group, Xu Dan, secretary general of Heilongjiang Graphite Association, and other leaders visited Graphite Valley Industry Group for a visit and investigation, accompanied by Fang Zhenhui, chairman of the company. Zhang Wensheng, deputy chief engineer of Heilongjiang Transportation Investment Group, Xu Dan, secretary general of Heilongjiang Graphite Association, and other leaders visited the company's graphene New Materials Research Institute, Graphite Science and Technology Exhibition Hall, graphene and carbon nanotubes intelligent workshop and the company's intelligent equipment workshop to fully understand the group's development history, industry background, scientific research strength and scientific and technological innovation achievements, and give high praise. After the visit, the two sides held a symposium. At the meeting, Chairman Fang Zhenhui first made a speech and warmly welcomed Zhang Wensheng, deputy chief engineer of the Provincial Transportation Investment Group, Xu Dan, secretary general of the Provincial Graphite Association, and other leaders to visit our company for research. In the following exchange, the company's general situation, business sector, development strategy and practical achievements in related fields were introduced in a simple and simple way, which was unanimously recognized by the leaders of the provincial traffic investment group and fully affirmed our company's position in the industry. At the same time, Zhang Wensheng, deputy chief engineer of the provincial transportation investment group, and Xu Dan, secretary general of the provincial graphite association, respectively introduced the general situation of the provincial traffic investment group and the graphite new material innovation center project, it is hoped that the two sides can carry out in-depth cooperation on related projects in the future and contribute to the development of graphite industry. At the meeting, the host and guest held warm and friendly discussions on graphite new material innovation projects and other related topics. The two sides talked about achievements, innovation and development, and further unified their opinions. Chairman Fang Zhenhui said that the Graphite Valley Industry Group has entered a period of rapid development and has determined the strategic goal of "one small step a year, one big step in three years, and five years on the platform to build a tens of billions of listed companies. In the future, Graphite Valley Industry Group will build and build a complete ecological blockchain for the graphite (ene) new material industry through industrial layout, technological innovation, and combined with the capital market, promote industry development, create industrial highlands, grasp development opportunities, and adhere to innovation leadership. Determined to become a leader in the new energy and new material industries, to promote the rapid and healthy development of strategic emerging industries and contribute to the sustainable economic and social development.

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