Jnc Corporation

Jnc Petrochemical Corporation

Keiichiro Kanao

Tetsuro Kizaki

Yoshihito Takano

Hirotsuna Yamada

Miwako Nishimura

Soichiro Sato

A composition for a secondary battery negative electrode including a carbonaceous material (a) and a silicon oxide structure (b), wherein the silicon oxide structure (b) includes a silicon oxide framework containing Si and O in its atomic composition and silicon-based nanoparticles that are chemically bonded to the silicon oxide framework as components, wherein the silicon oxide structure (b) is contained in a proportion of 15 mass % or more with respect to a total amount of the carbonaceous material (a) and the silicon oxide structure (b), and wherein the silicon oxide structure (b) satisfies the following conditions (i) to (iii): (i) having an atomic composition represented by a general formula SiOH(0.3&#x3c;x2&#x3c;1.5, 0.01&#x3c;y2&#x3c;0.35), (ii) having Si&#x2014;H bonds, and (iii) being essentially free of carbon.

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Chiba, Japan

Keiichiro Kanao