• 专利标题:   Anode slurry comprises anode active material, binding agent, conductive agent and solvent, where binder is polyvinylidene fluoride, polytetrafluoroethylene, and polyvinyl alcohol, and conductive agent is tubular conductive agents, granular conductive agents, and sheet conductive agents.
  • 专利号:   CN115939383-A
  • 发明人:   HE K, LI F, CHEN P, YUAN X, XU Z
  • 专利权人:   BYD CO LTD
  • 国际专利分类:   H01M004/13, H01M004/62
  • 专利详细信息:   CN115939383-A 07 Apr 2023 H01M-004/62 202338 Chinese
  • 申请详细信息:   CN115939383-A CN11114025 23 Sep 2021
  • 优先权号:   CN11114025

▎ 摘  要

NOVELTY - Anode slurry comprises an anode active material, a binding agent, a conductive agent and a solvent, where the binder is polyvinylidene fluoride, polytetrafluoroethylene, and polyvinyl alcohol, and the conductive agent is tubular conductive agents, granular conductive agents, and sheet conductive agents. The mass m of the binder satisfies the following relationship: 2.2 k ≤ m ≤ 2.6 k, k = 100 B + m 1 × B 1 × d1/(d 1 + d 2)+m 2 ×B 2+m 3 × B3/1781 where B represents the specific surface area of the anode active material, m1, B1, d1, and d2 represent the mass, specific surface area, outer diameter, and inner diameter of the tubular conductive agent, m2, B2 represents the mass and specific surface area of the granular conductive agent respectively, m3 and B3 represent the mass and specific surface area of the sheet-shaped conductive agent respectively, and the units of B, B1, B2 and B3 are m2/g, m, The units of m1, m2, and m3 are g. USE - The anode is useful in anode sheet and battery such as lithium ion battery used in portable electronic device, electric automobile field. ADVANTAGE - The anode has good structure stability and the energy density of the battery is high. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a battery.