Analysis: Research status of graphene in the field of supercapacitors

Since the birth of graphene, people have been interested in the research and development and application prospects of this new material, and it has also become the darling of capital and the market. It is also widely used in the fields of electronics, aerospace special, new energy and new materials. On November 25, at the 20th 'Industrial Technology Information' press conference hosted by the Industrial Information Research Center of the Documentation and Information Center of the Chinese Academy of Sciences, the researchers combed the application of graphene in supercapacitors and biosensors in detail. The theme of the release focuses on the same field, and based on the authoritative database analysis, the future development trend of the two is judged.

The following extracts related content in the field of supercapacitors:

Graphene is the thinnest, lightest, hardest, most conductive and most flexible nanomaterial in the world. Its power is often staggering. A one-centimeter-thick graphene plate can make a 5-ton adult elephant stand on it; a mobile phone battery made of graphene can be fully charged in one second; a tablet computer made of graphene, which can be folded into the size of a mobile phone and put in a pocket at will.

Since the birth of graphene, people have been interested in the research and development and application prospects of this new material, and it has also become the darling of capital and the market. It is also widely used in the fields of electronics, aerospace special, new energy and new materials.

Qian Weizhong, a professor at the Department of Chemical Engineering of Tsinghua University, and Shi Jidong, a doctoral student at the National Center for Nanoscience and Technology, participated in the launch event as specially invited experts and discussed with the participants based on their current research work.

Graphene supercapacitor technology: China is in a period of rapid growth

Today's energy and environmental problems are becoming more and more serious, and the development demand for green transportation represented by new energy electric vehicles is increasing. Solving the problem of its braking energy recovery system is one of the keys to the development of the industry. Therefore, the industry has an increasingly urgent demand for electrochemical energy storage devices that take into account both high energy density and high power density. At the same time, supercapacitors have been given great expectations due to their long service life, short charging time, display capacity, unlimited materials, and good low-temperature performance.

Graphene has good electrochemical properties, tensile properties and a structure that is easy to synthesize with other active materials. Similar to activated carbon, it can be used as a good and stable negative electrode material and is gradually applied to supercapacitor capacitor materials. The main research fields of graphene supercapacitors include: transition metal oxides for electrode materials, activated coal, nitrogen-doped graphene, current collector surfaces, etc.; related technologies include graphene oxide monomers, transition metal oxides, nitrogen Doping, coal activation, etc.

With the discovery of the separation and preparation method of graphene by physicists at the University of Manchester in the United Kingdom in 2004, the application of graphene in supercapacitors has gradually begun to develop rapidly. At present, the average number of related technology patents is about 250 per year.