NEGATIVE ELECTRODE ACTIVE MATERIAL, NEGATIVE ELECTRODE ACTIVE MATERIAL MIXED MATERIAL, NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES, LITHIUM ION SECONDARY BATTERY, METHOD FOR PRODUCING NEGATIVE ELECTRODE ACTIVE MATERIAL, AND METHOD FOR MANUFACTURING LITHIUM ION SECONDARY BATTERY

摘要

The present invention is directed to a negative electrode active material containing particle of the negative electrode active material, wherein the particle of the negative electrode active material contains particle of a silicon compound which contains a silicon compound (SiO_x: 0.5≤ x≤ 1.6), the particle of the silicon compound contains lithium, and the particle of the negative electrode active material has a total content rate of a polyphenylene compound component and a polycyclic aromatic component measured by TPD-MS of 1 ppm by mass or more and 4,000 ppm by mass or less. As a result, a negative electrode active material capable of improving cycle characteristics and initial charge/discharge characteristics can be provided when it is used as a negative electrode active material of a lithium ion secondary battery.