NEGATIVE ELECTRODE FOR NONAQUEOUS SECONDARY BATTERY, NONAQUEOUS SECONDARY BATTERY, NEGATIVE ELECTRODE ACTIVE MATERIAL AND MANUFACTURING METHOD THEREFOR, COMPOSITE INCLUDING NANO SILICON, CARBON LAYER AND CATIONIC POLYMER LAYER, AND METHOD FOR MANUFACTURING COMPOSITE INCLUDING NANO SILICON AND CARBON LAYER

摘要

To enhance the cycle characteristic of a nonaqueous secondary battery.SOLUTION: An active material comprising first and second active materials is used in a negative electrode. The first active material includes nano silicon taking on a structure in which six-membered rings constituted by silicon atoms are arranged in a row, and manufactured by performing a thermal treatment on a layered polysilane expressed by the composition formula, (SiH)n. The second active material includes graphite. The active material enables the relaxation of a stress caused by expansion and contraction during charge and discharge, and enhances cycle characteristics.SELECTED DRAWING: None