NEGATIVE-ELECTRODE ACTIVE MATERIAL, PRODUCTION PROCESS FOR THE SAME AND ELECTRIC STORAGE APPARATUS

摘要

A negative-electrode active material is used, the negative-electrode active material including: a nanometer-size silicon material produced by heat treating a lamellar polysilane having a structure in which multiple six-membered rings constituted of a silicon atom are disposed one after another, and expressed by a compositional formula, (SiH)n; and the nanometer-size silicon material including silicon, and a halogen element wherein the halogen element is included in a molar fraction of 11.5 or less to a molar amount of the silicon taken as 100. Since the content of halogen has been reduced, an electric storage apparatus using the negative-electrode active material for one of the negative electrodes has an upgraded capacity maintained rate.

主权项

1. A negative-electrode active material comprising a nanometer-size silicon material produced by heat treating a lamellar polysilane having a structure in which multiple six-membered rings constituted of a silicon atom are disposed one after another, and expressed by a compositional formula, (SiH)n; and
the nanometer-size silicon material including silicon, and a halogen element wherein the halogen element is included in a molar fraction of 11.5 or less to a molar amount of the silicon taken as 100.