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

摘要

A negative electrode active material for lithium ion secondary batteries, which is imparted with a desired electrical conductivity, can be provided by using a negative electrode active material for lithium ion secondary batteries containing silicon nanowires that are doped with an impurity and have an electrical conductivity of 10 S/m or more. The characteristics of a lithium ion secondary battery can be improved by using this negative electrode active material for lithium ion secondary batteries in the lithium ion secondary battery.