What are the advantages of graphene, a negative electrode material for lithium batteries?

Advantages of graphene as a negative electrode material for lithium batteries 1. The graphene sheets are flexible and can effectively buffer the volume expansion of metal electrode materials; 2. The excellent conductivity of graphene can enhance the electron transmission capacity of metal electrode materials; 3. Graphene surface The activated nucleus point can control the metal oxide particles grown on the surface to maintain the nanometer size and improve the rate performance of the material; 4. The specific capacity of the composite material is greatly improved relative to the pure graphene; the new type of lithium battery anode material graphene The application prospects of the battery using graphene as the negative electrode material is three times the current market's best product. An electric vehicle powered by this battery can travel up to 1,000 kilometers, and the charging time is less than 8 minutes. The cost of graphene batteries with such excellent performance is not high. It is 77% lower than ordinary lithium batteries, which is completely within the consumer's range. In the positive electrode composite material, the special structure of graphene with two-dimensional high specific surface area and excellent electron transport ability can effectively improve the conductivity of the positive electrode material and improve the diffusion and transport ability of lithium ions. Compared with traditional conductive additives, the advantage of graphene conductive agent is that it can use a smaller amount of addition to achieve better electrochemical performance. Pure graphene materials can not replace the current commercial carbon materials directly used as lithium battery anode materials due to the low first-cycle Coulomb efficiency, high charge and discharge platform, and poor cycle stability. However, graphene can be used as an excellent matrix material to play a greater role in lithium battery composite electrode materials. Combining graphene with natural graphite, carbon nanotubes, fullerenes and other carbon materials can use the special sheet structure of graphene to improve the mechanical properties and electron transmission capabilities of the material. At the same time, the interlayer spacing of the doped graphene sheets increases, providing more lithium storage space. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What are the advantages of polymer lithium batteries and ternary lithium batteries?