NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

In order to ease the lowering of electron conductivity due to fine particles pulverized by repeated charging/discharging when composite particles containing Si or Sn are used for a cathode, a particle size ratio Dc/Da between the median diameter Da of a cathode material and the median diameter Dc of a conductive material is set to 0.02 to 0.5.