NEGATIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS SECONDARY BATTERY AND NONAQUEOUS SECONDARY BATTERY

The invention provides a highly reliable negative electrode active material for a nonaqueous secondary battery and a nonaqueous secondary battery. The negative electrode active material for the nonaqueous secondary battery includes graphite containing boron. The graphite has a crystallite size Lc of 100 nm or more in the c-axis direction. In a Raman spectrum of a surface of the graphite, the ratioR of a maximum peak value Id of Raman intensity of a D band appearing at a Raman shift range of 1300 cm-1 or more and 1400 cm-1 or less to a maximum peak value Ig of Raman intensity of a G band appearing at a Raman shift range of 1500 cm-1 or more and 1650 cm-1 or less, R=Id/Ig, is 0.4 or more. 本发明提供可靠性高的非水二次电池用负极活性物质以及非水二次电池。所述非水二次电池用负极活性物质包含含有硼的石墨，所述石墨在c轴方向的微晶的大小Lc为100nm以上，在所述石墨表面的拉曼光谱中，在拉曼位移1300cm～1400cm的范围出现的D带的拉曼强度的最大峰值Id相对于在拉曼位移1500cm～1650cm的范围出现的G带的拉曼强度的最大峰值Ig的比例R＝Id/Ig为0.4以上。