Graphene is called 'black gold', 'king of new materials', and even hailed as 'completely changed 21st century black technology'. Research around graphene has been going on, especially in energy batteries. Especially for the battery life of smart phones and the rise of new energy electric vehicles, it accelerates the application of graphene in this aspect.
Recently, there was a message of "charging for 10 minutes and grasping 1000 miles of graphene battery" and sparking hopes, but graphene experts came out at the 2nd International Carbon Materials Conference Facts: One-sided emphasis on fast charge and fast release is just an academic statement, far from the real application is very graphene will contribute to the battery, but the so-called subversive changes can not be seen.
In addition to the application, there are still very serious problems in preparation of graphene itself, which are difficult to prepare and produce serious environmental pollution in the preparation process, all of which are that graphene wants to change from 'carbon' to 'black gold' and can not be bypassed More importantly, experts say graphene standards have not even been formulated and have not been agreed upon.
Graphene power or foam?
Graphene is called 'black gold', 'king of new materials', and even hailed as 'completely changed 21st century black technology.' The reason for this reputation is that graphene is the first discovery of carbon Atomic structure of the new single-lamellar structure of the material due to the arrangement of the special structure of carbon atoms led to graphene has some very amazing features: Graphene is not only the world's hardest material, but also has strong flexibility; and Has high thermal conductivity and ultra-fast carrier mobility.
Any of these features will be used to subvert the current industry technology: such as the transparency of graphene, conductivity and flexibility Applications In the field of electronic devices, you can achieve a flexible touch screen, the phone can be folded like a watch; Graphene impermeability and conductivity can be applied to the protective coating and barrier film; graphene flexibility, transparency and high sensitivity to a variety of physical signals can be made of sensors, applied to multi-functional electronic skin; can also be Graphene electrode materials used to enhance the performance of energy storage devices.
Any kind of application can be described as a disruptive revolution.Renzhong Fei, founder of Huawei, said in an interview that the next ten to twenty years will erupt a technological revolution, graphene era will subvert the silicon era, graphene It is the forefront of technological revolution.
Therefore, the development of graphene more than 10 years, China's research, 'graphene' enterprises are emerging, and even promoted the growth of the concept stocks of graphene .Shen Wanci, Tsinghua University, said: 'China has the world's largest natural graphite industry, graphite mining Selected technology and equipment are also in the world advanced level, Tanzania, Russia, Vietnam and other countries seeking to import graphite from China's mining technology and equipment, our country is from a large country of graphite to graphite power.
Quantitatively speaking, graphene enterprises in China also experienced explosive growth: "2016-2017 Annual Report on Graphene Development in China" released by China Economic Information Network shows that since 2016, more than 700 new graphene enterprises in China have been added , Of which R & D enterprises accounted for about 43%.
However, for this phenomenon, Liu Zhongfan, an academician of the Chinese Academy of Sciences and a professor of chemistry at Peking University, believes that there is a mass movement of "swarming" in the graphene industry in China, similar to the big steelmaking operation during the Great Leap Forward of the year. When concluded: China's graphene industry there are many anomalies. The stock market blind speculation, the use of graphene spin-off; local government blindly launched, enclosure to build industrial park; there are a group of irresponsible graphene players fried concept.
In an interview with Netease Technology, Zhu Hongwei, a professor at Tsinghua University, also said in an interview with China NetEase Technology Co., Ltd. that graphene industry in China is a bit 'too hasty' with a bubble and a mixed bag. However, this phenomenon is an inevitable phenomenon that can be matured and finally applied.
Charging 10 minutes battery life 1000? Academic statement
Obviously, 'black gold' graphene is over-consumed.
Recently, Samsung released a report that has developed a new battery technology based on graphene materials, the battery based on graphene material will be higher than the current average capacity of 45% on the market, to improve Capacity at the same time than the standard charging speed of 5 times faster charging speed, there are media also interpreted as charging 10 minutes to run 1000.
In this regard, Liu Zhong Fan is very fair that the research on the application of graphene on lithium battery has more than 10 years of history, the idea is relatively simple, the basic is about 10% doped graphene in lithium batteries, you can improve Conductive conditions, reduce internal resistance, improve performance, can charge faster, higher capacity.
However, Liu Zhongfan also said that the effect is only a small cell in the lab can do the situation, if the real when used in real time, a lot of battery integration is hard to say such an effect.
'The battery is the most important security issues, if the security can not be guaranteed, one-sided emphasis on multi-block can not be used, this is just an academic claim.' Liu Zhongfan said, 'so far, the application of graphene in the battery there is nothing Breakthroughs are theoretically possible, but the sources of graphene are too complex, different ways of processing, different properties, and even today, different things to do tomorrow.
In this regard, China Graphene Industry Technology Innovation Strategic Alliance Standard Committee Dai Shifeng also bluntly, the battery contains graphene, does not mean that this is a graphene battery.
Graphene has not even reached a consensus on conceptual definitions and standards.
Moreover, although graphene itself is green does not mean that the process of producing graphene is green, graphene preparation process will produce a large number of environmental pollution.Present graphene preparation methods include: mechanical stripping method, epitaxial growth method , Graphite oxide reduction method, vapor deposition method and the like.
"Some preparation methods produce 40 tons of sulfuric acid and 120-150 tons of fresh water for every ton of graphene produced, which will generate a lot of waste acid waste." Related graphene companies disclosed.
Shen Wanci also said that in the management of graphene industry, the graphite enterprises at the beginning of reform and opening up basically did not invest in environmental protection, which made the graphite industry, which did not pollute heavily, cause serious pollution so far.
Graphene high-end applications have not yet been exceeded before, but there have been serious environmental pollution problems.
In this regard, Liu Zhongfan said that enterprises play an important role.Graphene pollution problems caused by the environment, can be solved at the technical level.Therefore, the environmental pollution caused by the preparation of graphene production involves more cost issues.
'The enterprises that mass-produce graphene should shoulder their social responsibilities and promote the development of graphene, and do not over-pursue profits and low prices. This problem can be solved easily.'
As experts in the graphene industry say, there are too many businesses in China that use the concept of graphene to cover up the real thing, and China's graphene needs to be faded away.
