Graphene lithium battery is one of the hot technologies in the field of new energy vehicles, which has the advantages of high energy density and fast charging speed. In the A-share market, the graphene lithium battery sector is active, and many stocks are concerned by funds. The following small series brings graphene to produce leading stocks, which is of great benefit to you. Let's have a look.

Leading stock for producing graphene

Shares of graphene listed companies include Yi Sheng Technology, China Electric Power, Fangda Carbon, Zhongtian Technology, Aixu, Xinhua Jin and Chint.

1, Yi Sheng Science and Technology: Yi Sheng Science and Technology owns the patent of titanium dioxide and graphene oxide composite nanosheet material and its preparation method. This company is the largest professional manufacturer of copper clad laminate in China. The company's main products are flame retardant epoxy glass fiber cloth copper clad laminate, composite substrate epoxy copper clad laminate and a series of prepreg for multilayer board.

2. China Electric Power Co., Ltd. belongs to the downstream application of industrial chain, and cooperates with Shanghai Xinchi New Energy to develop high-performance graphene lead-acid batteries and lithium batteries.

3. Fangda Carbon: The company is the world's leading production and supply base of high-quality carbon products and the research and production base of nuclear-related carbon materials; The leading products include various power graphite electrodes, microporous carbon bricks, semi-graphite carbon bricks and so on. , covering 4 series, 38 varieties, 126 specifications. There are high-grade graphite minerals in the upstream field, with an annual output of graphite carbon products 18/80,000 tons. At the end of 18, Sichuan Mingyuan Graphene Technology Co., Ltd. was established as a shareholder to engage in the incubation of new material development machine technology and expand productivity.

4. Zhongtian Technology: It belongs to the middle and lower reaches of the industrial chain. In terms of midstream preparation, it was announced on the evening of June 5, 2007 that Shanghai Zhongtian Aluminum Wire, a wholly-owned subsidiary, had made an important breakthrough in graphene preparation. In terms of downstream applications, Shanghai Zhongtian Aluminum Wire, a wholly-owned subsidiary, has made an important breakthrough in the application of new metal-based graphene composites.

5. Aixu shares: 20 13 In March, Shengxing Industry, the major shareholder of the company, intends to transfer its shares accounting for 8.06% of the company's total share capital to Nanjiang Group. Nanjiang Group has been involved in the investment and development of graphene industry, mainly in the initial stage of production and R&D, and the expected income in the future is uncertain.

6. Xinhuajin: Xinhuajin Group, the major shareholder, is rich in graphite mineral resources and cooperates with the Key Laboratory of Qingdao University to prepare graphene. (Xinhua Jin said that graphene is a resource of Xinhua Jin Group and has nothing to do with listed companies. At present, it is not known whether the Group has any plans to inject assets into listed companies.

7. Zheng Tai: On March 65, 1965, at 438+06, 65, 438+07, Chairman Nan Cunhui said at the forum with the central mainstream media that Zheng Tai was developing the world's first graphite dilute polymer battery using Spanish GrabatEnergy. The efficiency of the battery is 10 times that of the lithium battery, and it can run in 8 minutes when applied to new energy vehicles 1000 km.

List of leading graphene stocks

The leading stocks of graphene are: Zhongke Electric (300035), Anjie Technology (002635), Xinjiang Zhonghe (600888), Baotailong (60101) and Xu Dong Optoelectronics (00041).

The name of the leading stock is related to the industry category of the plate. Zhongke Electric 30035 Gemei Chemical's main business includes the development of traditional graphite anode materials such as artificial graphite, natural graphite and composite graphite, as well as the development of graphite electrode and cathode materials for electrostatic graphite plasma batteries; Xingcheng Graphite, an upstream subsidiary, is mainly engaged in the processing of graphite mineral products and graphite powder with international advanced technology. Gleiter is an advanced graphene processing service provider in China, a wholly-owned subsidiary of Midstream Equipment, and adopts the graphene laboratory preparation method. Xingcheng graphite subsidiary's main business includes research and development, production and sales of graphene materials; By the end of September, 2065438, the workshop of 20000 tons/year anode material and 10000 tons/year graphitization production line and its ancillary buildings had been completed. The company provides graphite radiator, graphene film radiator and other heat dissipation products. At present, the company is still developing heat dissipation products that are more suitable for 5G mobile phones. Xinjiang Zhonghe 600888 Shanghai Nonferrous 5 1. Xinjiang Elektronium Technology owns 00% interests and is engaged in the research and development and production of graphene aluminum alloy and alloy powder. The preparation method of graphene aluminum matrix composites has been patented.

What are the leading stocks of graphene concept?

Graphene concept leading stocks are:

1, Tongcheng new material 603650: The company holds the equity of Beijing Graphene Research Institute Co., Ltd. 16%, which is mainly engaged in the basic research and industrial application of graphene technology.

2. Yulong 60 1028: It belongs to the downstream of the industrial chain. Yulong plans to invest in Tianjin Yuhanyao Graphene Energy Storage Materials Technology Co., Ltd. by means of equity transfer and cash capital increase, with a total investment of 790 million yuan, and holds 33.34% equity of Yuhanyao after the investment. Yu Hanyao's main products are ternary cathode materials, modified ternary cathode materials and modified composite conductive paste.

3. del future 00263 1: It belongs to the upstream and downstream of the industrial chain. In terms of upstream graphene, the holding group has 60 million tons of graphite ore; In terms of upstream equipment, Encheng Technology owns 60% of the market share of vapor deposition graphene preparation equipment. Downstream, Elektronix's graphene thermal conductive plastic and thermal conductive film are both blue ocean markets.

In addition, graphene concept stocks include: Baichuan 002455, Gorgeous Family 600503, Hangdian 6036 18, Dongfang Material 60310, Wei Xing New Material 002372, Le Tong Stock 0023 19 and china baoan 00009.

Five leading companies of graphene in the future

Xinjiang Zhonghe 600888: the leading stock of graphene. In the first quarter of 20021the company's total operating income was181300 million, up by 97.26% year-on-year; Gross profit is 207.3 million yuan and net profit is 65.438+34 million yuan.

The preparation method of graphene aluminum-based composite material of subsidiary Xinjiang Olefin Oil Ink Technology Co., Ltd. has been patented.

Meg 002340: the leading stock of graphene. In the first quarter of 20021,the company's total operating income was 3.73 billion, up 62.21%year-on-year; Gross profit is 770 1 10,000, and net profit is 254 million yuan.

From 2065438 to September 2005, the company and Shenzhen Amway Hao Company established the Intrinsic Equation Graphene Company. And Shenzhen Amway Hao invested 20 million yuan respectively, accounting for 20% of the equity of the joint venture company, and invested 60 million yuan with their patented technology in the graphene field, accounting for 60% of the equity of the company.

Fangda Carbon 6005 16: The company is the world's leading production and supply base for high-quality carbon products and a research and development and production base for nuclear-related carbon materials; The leading products include various power graphite electrodes, microporous carbon bricks, semi-graphite carbon bricks and so on. , covering 4 series, 38 varieties, 126 specifications. There are high-grade graphite minerals in the upstream field, with an annual output of graphite carbon products 18/80,000 tons. At the end of 18, Sichuan Mingyuan Graphene Technology Co., Ltd. was established as a shareholder to engage in the incubation of new material development machine technology and expand productivity.

Baotailong 60 10 1 1: It is the only resource stock with its own graphene mine in the graphene plate, the largest graphene mine resource stock in China, and a real graphene theme stock, with good hype!

Gorgeous family 600503: The current market value is 5.944 billion. On July 6, the gorgeous family opened at 3.75 yuan today. As of 10: 37, the stock fell 2.96% to 3.6 1 yuan.

What are the advantages and disadvantages of graphene batteries for electric vehicles?

1. Advantages of graphene battery:

The storage capacity is three times that of the best products on the market at present. The specific energy of lithium battery (whichever is the most advanced) is 180Wh/kg, while that of graphene battery exceeds 600Wh/kg. This battery-driven electric car has a mileage of 1000 km and a charging time of less than 8 minutes. The service life is 4 times that of traditional hydrogenated batteries and 2 times that of lithium batteries. The characteristics of graphene can reduce the weight of a battery to half that of a traditional battery and improve the efficiency of a machine equipped with the battery.

Compared with traditional batteries, graphene has more advantages. Its service life is twice that of lithium batteries and four times that of hydrogenated batteries. The charging speed is faster, and it is more durable than lithium battery at high temperature.

2. Disadvantages of graphene battery:

At present, graphite dilution has not reached the practical stage, and there is still a long way to go before mass production. These graphene batteries on the market are not pure graphene batteries, but are based on lithium batteries and doped with some graphene related technologies. Compared with traditional lithium batteries and batteries, their performance has only improved a little. In addition, the cost of graphene is very high, and its manufacturing process is also very high. The manufacturing process of graphene battery is not mature enough, and it is still in the laboratory stage, so it cannot reach the mass production level.

Incompatible process characteristics. That is to say, because the specific surface area of graphene is too large, it will bring many technical problems to the existing process, such as dispersion and homogenization of lithium-ion batteries. The surface properties of graphene are greatly influenced by chemical state, and there are many problems in batch stability and cycle life. At present, it can't meet many detailed requirements of lithium battery production.

3. Advantages of lithium battery

The energy density is high, and its volume energy density and mass energy density can reach 450 w h/dm3 and150 w h/kg respectively, and are still increasing. The average output voltage is high (about 3.6V), which is three times that of Ni-Cd and Ni-MH batteries. High output power. Self-discharge is less than 10% per month, which is less than half of nickel cadmium and nickel milliliter. There is no memory effect like Ni-Cd and Ni-MH batteries, and the cycle performance is superior. It can be charged and discharged quickly, and the capacity of 1C can reach more than 80% of the nominal capacity when charging.

High charging efficiency, basically 100% after the first cycle. The working temperature range is wide, from -30 to 45, and there are many leading stocks of lithium batteries. With the improvement of electrolyte and positive electrode, it is expected to be widened to -40 to 70, and the low temperature may be expanded to -60. No maintenance required. It is "friendly" to the environment and is called green battery. Long service life, 100%DOD can be charged and discharged for more than 900 times; When using shallow depth (30%DOD) to charge and discharge, the number of cycles has exceeded 5000.

4. Disadvantages of lithium batteries

The high cost is mainly due to the high price of cathode material LiC002. With the continuous development of cathode technology, LiMn204 and LiFeP04 can be used as cathode, which is expected to greatly reduce the cost of lithium-ion batteries. There must be a special protection circuit to prevent overcharging or overdischarge; Poor compatibility with ordinary batteries, because lithium-ion batteries can only be replaced with three ordinary batteries (3.6V).