The recent material science community, because of the combination of graphene and a Chinese company, Huawei, has become very lively.
Since it was first produced artificially 12 years ago, it has become a global goal to bring graphene, which has broad application prospects in the fields of electronic information, new materials, new energy, and biomedicine, into the industrialized production field.
Therefore, when Huawei's Central Research Institute Watt Lab announced at the 57th Japan Battery Conference that it would "launch the industry's first high-temperature long-life graphene-based lithium-ion battery," the country was boiling. Despite the facts, this "graphene-based battery" is not a "graphene battery", but it does not affect the expectations of Huawei in the field of graphene.
Is the graphene battery a "bubble"?
Since October 23, 2015, Huawei and the University of Manchester have reached a graphene application research project. Everyone is looking forward to Huawei's "subversive" results, but everyone understands that it is not so easy.
In fact, Huawei announced at the Japan Battery Conference the innovation of “graphene-assisted high-temperature lithium-ion batteryâ€. The research results come from the Watt Lab, which aims to break through the key technologies and enhance the performance ceiling of existing lithium batteries. Applied research project from the University of Manchester.
According to Li Yangxing, chief scientist of Huawei's Watt Lab, Huawei plans to use mobile network base stations for high temperature and extreme environments such as desert and direct sunlight. In high-temperature batteries, graphene plays a role in efficient heat dissipation instead of batteries. Positive or negative electrode material.
It is understood that in the high-temperature battery, graphene is mainly matched with the positive and negative electrodes, and an electrically and thermally conductive scaffold is built inside the electrode material, which reduces the internal resistance and improves the heat dissipation. For example, adding steel to the concrete to increase the strength, MSG is added to the dish to enhance the taste, and graphene is combined with the positive and negative materials to make the energy storage function better.
Although this is not a graphene battery, according to information provided by Huawei, the performance of this new battery has been able to kill most of the lithium batteries currently on the market. "Experimental results show that new high temperature resistant technology based on graphene can be used for lithium. The upper limit of the ion battery is increased by 10 ° C and the service life is twice that of a normal lithium ion battery."
Huawei's high-temperature battery has given people a new yearning for graphene batteries. Graphene batteries are already a "super battery" in the eyes of the masses and the media, but Wu Xiaowen, marketing director of a new energy company, said: "Graphite The olefin battery has not been strictly defined until now. I dare not conclude in other directions. In the battery field, especially the direction of lithium batteries, 'graphene battery' is basically a paranoia."
There are countless advances in graphene batteries, many of which claim to be about to develop molded products, and even have molded products, but then there is no following. Wu Xiaowen said that the use of graphene as a battery material, whether it is cost or process, there are still many internal and external problems to be solved, and as a result, graphene batteries have been published numerous times, and many times have disappeared.
Graphene industry is expected to enter the blowout period
Although graphene batteries are not optimistic, its application prospects in other fields are worth looking forward to.
For example, graphene materials are of great significance to mobile phones. If a large number of mobile phones use graphene technology, it means a revolution like a smart machine instead of a functional machine.
According to the industry's prospects, if the mobile phone chip is made of graphene material, the performance will be greatly improved and the power consumption will be greatly reduced. If graphene is used for the two poles of the mobile phone battery , the battery life will be more than ten times that of the ordinary battery. Charging will become a history; if a capacitor device is made of graphene, its charging and discharging speed is 100 times to 1000 times that of a lithium battery, and the smartphone can be charged in a few minutes; graphene has light, thin, almost complete light transmission, and high strength. , flexible and so on, if used on mobile phones, we will be able to use the flexible screen rolled up.
Although all this is just an imagination, industry leaders are all committed to graphene technology.
In 2014, Ren Zhengfei said in an interview with the media that there will be a technological revolution in the next 10 to 20 years. "I think the biggest subversion in this era is the era of silicon in the graphene era." "The chip now has a limit width, silicon. The limit is seven nanometers, and it is near the border. Graphite is at the forefront of the technological revolution. It is the foreseeable future of 10 to 20 years, and this is the real revolution."
More than just Huawei, Samsung, Apple, and Nokia have become increasingly fierce in the graphene field. The most eye-catching application of Nokia's patents is the use of graphene to make high-performance ultra-thin camera sensors (graphene is sensitive to light search). The degree is more than a thousand times that of the imaging sensor currently used by the camera).
At the World Mobile Congress Graphene Summit this year, the head of the Global Trade Association GSMA, which represents the interests of global communications operators, said: "The current global graphene production capacity has reached 100 tons, and the GSMA Alliance expects that in the next five to ten years, The annual production capacity of graphene will reach 1,000 tons. By 2020, the scale of graphene industrialization will make a breakthrough. Among them, the new energy market will exceed 53.4 billion yuan, and the composite materials market will exceed 37.2 billion yuan. Will exceed 26.7 billion yuan."
China's graphene industry technology innovation alliance released in July this year's "2016 global graphene industry research report" (hereinafter referred to as "Report") said that graphene research and development results transformation and industrialization has developed rapidly, so far, a considerable number of research and development projects It has been successfully completed and entered the commercial preparation period, and the graphene industry is expected to enter the development period of the blowout.
China is in the boom of graphene “gold rushâ€
The China Graphene Industry Technology Innovation Alliance predicts that the graphene industry is still in its infancy. It is expected that by 2020, the global graphene will form a complete industrial chain, the market scale will reach 100 billion yuan, and China will account for 50% to 80%. It will play a leading and central role in the global graphene industry.
Since 2011, Chinese scholars have published the first academic papers on graphene, and the patents for graphene in China have accounted for 40% of the global total. At the same time, China is also leading the industrialization movement of graphene materials. According to incomplete statistics, there are currently more than 300 companies engaged in the development of graphene products and production equipment, mainly focusing on graphene raw materials, lithium ion battery conductive additives, super Capacitors , anti-corrosion coatings, electric heating and health equipment, touch screens and other fields.
However, Liu Zhongfan, the chairman of the Zhongguancun Graphene Industry Alliance, academician of the Chinese Academy of Sciences, and director of the Center for Nanoscience and Technology Research at Peking University, expressed his concern about the “enes flowing†in the domestic graphene industry on one occasion. Graphene has a bright future, but now we need patience and persistence, and we need to make steady efforts.
Academician Liu Zhongfan said at the China International Carbon Materials Conference held on December 8th: "Although China has the largest research and development team of graphene, the research and development strength is relatively scattered, and the small workshop-style disorder has become the main factor in the current graphene industry. Features. The construction of industrial parks also appears to be blindly advancing, with simple repetitions."
China is in the middle of graphene gold rush, and graphene industrial parks are being built all over the country. According to the data provided by Academician Liu Zhongfan on the keynote report of the Fifth China Science and Technology Policy Forum on September 12, according to incomplete statistics, there are nearly 20 industrial parks with graphene flags, and there are developed regions and underdeveloped regions. It is called a graphene industrialization movement.
"Although China's graphene market is very hot, overall, it only pays attention to low-end output and despise the focus on the future core technology of graphene industry." Liu Zhongfan stressed that due to insufficient research and development cooperation capabilities, key preparation technologies have not been resolved. The development and application level is low-end, which restricts the application of graphene in more fields.
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