Is the prospect of graphene as a new energy storage material?

Graphene has a large specific surface area, good electrical conductivity and thermal conductivity, and is a potential energy storage material. Graphene as an energy storage material has the following advantages:

Graphite raw materials are abundant and cheap, and the cost of graphene prepared by chemical method is low; the low-temperature expansion method invented by our research group has greatly reduced the cost. After optimizing and amplifying the process, the chemically prepared functional graphene material is expected to become a very competitive energy storage material.

Graphene has good electrical conductivity and an open surface, giving it good energy storage power characteristics. The macroscopic texture is formed by overlapping micron-sized and conductive graphene sheets to form an open large-aperture system. Such a structure provides a very low barrier to the entry of electrolyte ions, ensuring the material. Good power characteristics.

Graphene has a large theoretical specific surface area. The large specific surface area determines its high energy density. At present, the specific surface area (200-1200 m2/g) of graphene materials is far from the theoretical prediction value. How to control the texture of graphene so that the surface of graphene can be completely infiltrated by electrolyte solution is an important issue at present. .

The characteristics of graphene are similar to those of activated carbon and graphite materials. If used as an electrode material, it can be compatible with existing supercapacitors and lithium ion batteries. Graphene materials have electrical and thermal conductivity properties, and can form a thickness-regulated graphene film, which can construct very good thin-film batteries and energy storage devices.

As a basic material of sp2 hybrid materials, graphene can be constructed by secondary modification and recombination, and by constructing “nano-architecture”. By optimizing the structure, materials with high storage capacity can be obtained. Studies have shown that single-walled porous carbon obtained by twisting a single layer of graphene sheets can be prepared in the microporous pores of molecular sieves, and very good high-power characteristics can be obtained by heat treatment.

In summary, graphene materials have excellent energy storage properties and also show good application prospects. At present, the research of graphene has yet to be deepened. After systematic research and development to solve scientific problems and technological problems, it is expected to become an electrode material with huge market potential.

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