Adchemco Corporation

Kenshi Noda

Masayasu Nagoshi

Tetsuo Shiode

Takaaki Kondo

Hiromi Okamoto

Kunio Miyazawa

Yasuhiro Mogi

Kazuteru Tabayashi

Hidetoshi Morotomi

Boron-substituted graphite, which contains N-bonded boron atoms in a small proportion relative to whole substituted boron atoms, is produced by heating a feed fine particulate mixture of an infusibilized carbonaceous material and a boron compound such that the carbonaceous material is carbonized into a carbon structure, raising a temperature of the resulting heated fine particulate mixture promptly to a graphitization treatment temperature in an inert atmosphere unreactive with boron, retaining the graphitization treatment temperature for a time sufficient to allow graphitization of the carbon structure to proceed to a desired extent, and then quickly cooling the resulting graphitized mixture. The boron-substituted graphite is useful as a negative electrode in a lithium-ion secondary battery.

Production process of material for lithium-ion secondary batteries, material obtained by the process, and batteries

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Tokyo, Japan

Kenshi Noda