AMORPHOUS CARBON MATERIAL AND GRAPHITE CARBON MATERIAL FOR NEGATIVE ELECTRODES OF LITHIUM ION SECONDARY BATTERIES, LITHIUM ION SECONDARY BATTERY USING SAME, AND METHOD FOR PRODUCING CARBON MATERIAL FOR NEGATIVE ELECTRODES OF LITHIUM ION SECONDARY BATTERIES

摘要

An amorphous carbon material is used as a negative electrode material for a lithium ion secondary battery, and has a circularity of 0.7 or more and 0.9 or less, an average particle diameter of 1 占 퐉 or more and 30 占 퐉 or less, Is 700 ppm or more and 2500 ppm or less.