Lithium battery-conductive agent

Conductive agent has two main functions in the whole battery: conduct electrons and absorb electrolyte; so after adding conductive agent, it can improve rate, cycle, reduce internal resistance and increase battery capacity; conductive agent cannot be added more or less, more This will not only affect the energy density, but also affect the performance of the positive electrode gram capacity and the production process; the disadvantages of missing it are needless to say. Conductive agents are divided into metal conductive agents and carbon-based conductive agents according to their substances. At present, carbon-based conductive agents are mainly used, mainly: Super-P, acetylene carbon black, graphite, VGCF, CNT, etc. In terms of resistivity, CNT has the smallest resistivity, followed by VGCF, and Super-P has the largest resistivity; however, the problems faced by VGCF and CNT are dispersion and price issues; some domestic manufacturers are studying dispersed conductive liquids, such as Beitri’s nano conductive liquid, Beijing Tiannai’s conductive liquid, and Shenzhen Nanoport’s conductive liquid; I have evaluated them, and the results are not very good, and the price/performance ratio is not cost-effective. Therefore, Super-P and conductive graphite are the most used conductive agents at present; the main supplier is Timical; the agents are Jiejin Chemical and Shanghai Huipu. In addition, acetylene carbon black is also effective. It is processed by Japanese manufacturers and domestically. It is mainly nano superconducting acetylene carbon black. Adding a small amount can greatly improve the conductivity. At present, most manufacturers of lithium ion battery processing companies use composite conductive agents, that is, a mixture of several conductive agents: the commonly used combination is SP+KS series; or SP+VGCF, etc.; even some manufacturers use 3 components Conductive agent. In the future, composite conductive agents will be the focus of research on conductive agents. 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: Lithium Battery-High Temperature Adhesive Paper