Nippon Chemi-con Corporation

Prime Planet Energy & Solutions, Inc.

Masaki Koike

Shuichi Ishimoto

Satoshi Kubota

Noriyuki Miyamoto

Katsuhiko Naoi

Kenji Tamamitsu

Wako Naoi

Yasuo Ikeda

Yoshihiro Minato

Sekihiro Takeda

Masashi Otsuka

Seiichi Sakuramoto

Yuzo Suzuki

Makoto Ochi

Yasuyoshi Shiraishi

Keiichiro Kobayashi

Takahide Takeda

Kosyo Abe

Yasushi Tsuchida

Kosuke Iwase

Mio Takeno

Provided is a conductive carbon mixture which is to be used together with an electrode active material in manufacturing an electrode of an electricity storage device and enables the manufacture of the electricity storage device having a good cycle life. The conductive carbon mixture for manufacturing an electrode of an electricity storage device comprises an oxidized carbon having electrical conductivity and a different conductive carbon which is different from the oxidized carbon, wherein the oxidized carbon covers the surface of the different conductive carbon. The conductive carbon mixture is characterized in that the ratio of the peak intensity of the 2D band to the peak intensity of the D band in a Raman spectrum of the conductive carbon mixture is 55% or less relative to the ratio of the peak intensity of the 2D band to the peak intensity of the D band in a Raman spectrum of the different conductive carbon. This conductive carbon mixture covers the surface of the electrode active material in a particularly good manner and thus prolongs the cycle life of the electricity storage device.

Conductive carbon mixture and method for manufacturing same, electrode using conductive carbon mixture and method for manufacturing same, and electricity storage device provided with electrode

Provided is an electrode which gives an electric storage device that has high energy density and good cycle life. This electrode for an electric storage device is characterized by having an active material layer that contains: an electrode active material particle; and a paste-like conductive carbon that is derived from an oxidized carbon obtained by giving an oxidizing treatment to a carbon raw material with an inner vacancy and covers a surface of the electrode active material particle. The paste-like conductive carbon derived from the oxidized carbon is densely filled not only into a gap that is formed between the electrode active material particles adjacent to each other but also into a pore that exists on the surface of the active material particle, so that the electrode density is increased, thereby improving the energy density of the electric storage device. In addition, since the paste-like conductive carbon suppresses dissolution of the active material, the cycle characteristics of the electric storage device are improved.

Electrode, method for producing said electrode, electricity storage device provided with said electrode, and conductive carbon mixture for electricity storage device electrode

Growing community of inventors

Tokyo, Japan

Masaki Koike