MATERIAL FOR NEGATIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, METHOD FOR PRODUCING SAID MATERIAL, NEGATIVE ELECTRODE, AND LITHIUM ION SECONDARY BATTERY

摘要

A material for a negative electrode active material for a lithium ion secondary battery, said material comprising porous carbon composed of a carbon matrix, wherein fine pores each having a diameter of 20 nm to 1 μm are formed on the surface of the carbon matrix, and nano fine pores which are respectively communicated with the fine pores and each of which has a diameter of 15 nm or less are formed in the inside of the carbon matrix.