METHOD FOR USING SILICON GRAPHITE COMPLEX PARTICLES, MATERIAL FOR IMPROVEMENT OF DISCHARGE CAPACITY OF GRAPHITE NEGATIVE ELECTRODE FOR NONAQUEOUS SECONDARY BATTERY, MIX PARTICLE, ELECTRODE AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To increase a charge/discharge capacity of a negative electrode for a nonaqueous electrolyte secondary battery without remarkably worsening charge and discharge cycle characteristics.SOLUTION: In a method for using silicon graphite complex particles according to the invention, the silicon graphite complex particles are used as a material for improvement of a discharge capacity of a graphite negative electrode for a nonaqueous secondary battery. The "silicon graphite complex particles" herein include scale-like graphite particles and silicon particles. The scale-like graphite particles are arrayed in a layer form. The silicon particles are held between the scale-like graphite particles. In such a case, it is preferable that the silicon graphite complex particles are added so that the mass ratio thereof falls within a range of 0.1-2.4 to the graphite particles.SELECTED DRAWING: Figure 4