Graphene-based lithium batteries are of concern to the Shenzhen stock exchange

On July 24, 2016, Shenzhen exchange issued a letter of concern. According to the letter of concern, during July 18, solstice and July 22, 2016, the stock price of dongxu photoelectric increased continuously, with an increase of 40.16% and that of dongxu B reached 14.65%. Meanwhile, the trading volume was obviously enlarged. In response, on July 25, Dong xuguang announced the suspension of its stock self-examination, in July 27 to resume trading and produced a sustained rise after the first drop.

The Shenzhen stock exchange focus falls on the "king of olefinic graphene base lithium battery third-party authority inspection report, to this, the reporter contacted the Tianjin 18, Germany Rhine TUV, etc by third-party authoritative testing institutions, each other have said there is no specific graphene based detection scheme of lithium battery, but you can test the traditional battery parameters. On July 27, dong xu announced that the company has carried out technical testing on Wang, and has a corresponding battery performance test report, but has not invited a third party testing institutions for testing.

The "king of graphene" caused the graphene plate to soar

On July 8, 2016, Dong xuguang announced the "king of graphene" graphene-based lithium battery. On July 9, dong released three announcements related to graphene's use in lithium batteries.

Among them, the announcement on the investment and construction of Taizhou graphene-based lithium battery project indicates that the company's holding subsidiary Shanghai cnyuanhuigu has signed the graphene-based lithium battery project agreement with the management committee of Taizhou new energy industrial park. The project is divided into two phases. In the first phase, a single graphene production line with an annual output of 3 tons of low-cost and high-quality graphene and a production line with an annual output of 300 tons of lithium battery positive and negative material will be built. Phase ii construction annual output of 150 million Wh power cell and pack production plant.

Graphene-based lithium battery attracted the attention of the Shenzhen stock exchange, dong Xuguang electronic trading resumed the first drop

Applications of graphene in various fields

Since then, the stock has continued to rise by the daily limit of over 40%. As a result, the graphene sector as a whole has gained 25% on average in the last four weeks, while the index has only gained 8% in the same period. The graphene sector as a whole is far from the index. In response, on July 24, 2016, the Shenzhen stock exchange issued a letter of concern to the company's board of directors, asking them to explain the recent surge in the company's stock price. In the letter, see focused on the recent release of the "king" graphene-based lithium battery technology information.

'king of alkene' causes stock market volatility by 'strength' OR 'gimmick'

The graphene-based lithium battery released by dong xudian is to add graphene to the positive electrode material, so as to improve the electrical conductivity of the positive electrode. The graphene-based lithium battery can be fully charged in 6 minutes at 10C(C is the ratio of the current when the battery is charged or discharged, which is the multiplier), which is 24 times more than conventional batteries, dong said at the press conference. Life of 3,500 times, the lithium iron phosphate battery is only about 2,000 times; which able to adapt to the working environment of -30-80 degrees Celsius.

Graphene-based lithium battery attracted the attention of the Shenzhen stock exchange, dong xuguang electronic trading resumed the first drop

Application of graphene to electrodes

According to the information released at the press conference, the technology of "enwang" graphene-based lithium battery is still of great breakthrough significance, but the authenticity of the parameters still needs to be tested. About detecting a problem, the reporter interviewed professor huang xuejie of group leader of research group of solid state ion of institute of physics of Chinese academy of sciences.

According to Huang xuejie's introduction, battery electrical performance mainly includes: specific energy, energy density, charge and discharge rate, cycle life, calendar life, safety, self-discharge rate, working temperature range, etc., which can be designed according to different application requirements. In the press conference, dong xu mentioned only three parameters, such as charge/discharge ratio, service life and operating temperature range. This method of separately proposing several parameters is generally applicable to scientific research papers. If it is a product, all parameters of battery performance must be discussed.

"It is unlikely that a true graphene battery will emerge in the next few years. At present, adding a small amount of graphene to the positive electrode can increase the electronic conductance of the positive electrode and improve the discharge rate characteristic of the battery. However, generally, the amount of addition is less than 1%. At present, the charging rate characteristic of lithium ion battery is determined by the negative electrode. Under the condition that the negative electrode material remains unchanged, thin negative electrode sheet design is generally adopted to improve the charging rate characteristic of the battery. 10C charging can be achieved, but the specific energy of the battery will be significantly reduced. In the absence of detailed test report data, it is difficult for me to make an in-depth interpretation, "Huang said.

On the evening of July 26, 2016, dong xu announced immediately after self-inspection: "Taizhou graphene-based lithium battery project still needs to go through one or two years of construction cycle, and the products still need to be certified. The future sales depend on the recognition and acceptance of the market, as well as the company's market development. The graphene-based lithium battery business will not have a significant impact on the company's performance this year. We would like to invite investors to view the graphene-based lithium battery project objectively and pay attention to the investment risks.

On July 27, when it resumed trading, the stock fell on its first day of trading. On the same day, dong xudian immediately announced that "enwang" has "battery performance test report," but did not release the details of the report. As mentioned before, there is no specific detection for graphene-based lithium battery at present, and it is predicted that the traditional battery detection scheme will be used. Specific technical analysis can only be carried out after the test report is published by dong xu photoelectric. It is hoped that the complete report of eight parameters is brought by dong xu photoelectric in this test report, instead of the three parameters of charge and discharge ratio, service life and operating temperature range.

Why can graphene move the stock market?

Graphene is a two-dimensional carbon atom structure. Professor Zhang yuanbo from fudan university has been working on the research and development of two-dimensional materials and is the earliest graphene researcher in China. As for graphene, Zhang said, "previously discovered carbon structures were stacked in three dimensions, while graphene is a two-dimensional ring structure, which is a planar structure. "Graphene has the advantages of light weight, high strength, strong toughness, good electrical conductivity, etc. In general terms, graphene can be compared to a piece of paper with very high strength and toughness.

Graphene-based lithium battery attracted the attention of the Shenzhen stock exchange, dong xuguang electronic trading resumed the first drop

Graphene material structure

Because of these advantages, graphene has very good prospects in various fields. Therefore, graphene has become a hot investment field for investors. Any technological breakthrough in graphene can cause considerable investment fluctuations.

This time, the release of "Wang" graphene-based lithium battery by dong xu power has caused more stock market fluctuations. Although Wang has the "battery performance test report" at present, this report is the self-inspection of the company, not from a third-party authoritative testing institution. Taizhou graphene-based lithium battery project will also take about two years to build, which means that the "king of ene" will not be able to achieve mass production within two years. As for the technical indicators of "enwang", we will bring you the follow-up analysis after the "enwang" battery performance test report is published.

The page contains the contents of the machine translation.