NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    2.
    发明公开

    公开(公告)号:EP4459728A1

    公开(公告)日:2024-11-06

    申请号:EP22915462.0

    申请日:2022-10-14

    摘要: Disclosed is a non-aqueous electrolyte secondary battery including: a negative electrode that includes a negative electrode active material; a separator; a positive electrode that is provided to oppose the negative electrode with the separator interposed therebetween; and a non-aqueous electrolyte. The negative electrode active material includes 3 mass% or more of a silicon-containing material. The silicon-containing material includes carbon composite particles. Each of the carbon composite particles includes a carbon phase and a silicon phase dispersed in the carbon phase. The non-aqueous electrolyte contains a 5- or 6-membered sulfur-containing cyclic ester compound that has a carbon-carbon unsaturated bond and a structure represented by -O-S(= O)n-O-, where n is 1 or 2.