NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, PRODUCTION METHOD FOR NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, NEGATIVE ELECTRODE MATERIAL SLURRY FOR LITHIUM ION SECONDARY BATTERY, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY

摘要

This negative electrode material for lithium ion secondary batteries has a C of 5.5 or less, C being a value obtained from a formula C = (pressure B - pressure A)/(1.70 - 1.35), where pressure A (kN/cm2) is defined as the pressure at which, when a 3.0 g specimen packed into a column space having a diameter of 15 mm is pressed down at a rate of 10 mm/min, a density of 1.35 g/cm3 is obtained, and pressure B (kN/cm2) is defined as the pressure at which a density of 1.70 g/cm3 is obtained.