NEGATIVE ELECTRODE ACTIVE MATERIAL FOR SECONDARY BATTERY, PRODUCTION METHOD OF NEGATIVE ELECTRODE ACTIVE MATERIAL FOR SECONDARY BATTERY, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a negative electrode active material for secondary battery excellent in cycle characteristics and initial charge and discharge efficiency of cycle, and which allows for high capacity when used in a lithium ion secondary battery, and to provide a negative electrode for lithium ion secondary battery using the same, a lithium ion secondary battery, and a production method of a negative electrode active material for secondary battery.SOLUTION: In a negative electrode active material for secondary battery, a plurality of composite particles (A) containing at least one kind selected from SiOand lithium ion conductor, and Si are aggregated. A negative electrode for lithium ion secondary battery uses the same. A lithium ion secondary battery and a production method of a negative electrode active material for secondary battery are also provided.SELECTED DRAWING: Figure 2