Shinshu University

Sumitomo Metal Mining Company, Ltd.

Meijo Nano Carbon Co., Ltd.

Nobuyuki Zettsu

Katsuya Teshima

Satoshi Kanada

Daewook Kim

Takeshi Kimijima

There is provided a positive electrode for a lithium-ion rechargeable battery in which it is possible to achieve both exceptional electrical conductivity and adhesion of an electrode active material to a current collector and it is possible to dramatically improve battery characteristics compared to those in the related art. A positive electrode for a lithium-ion rechargeable battery includes a current collector; and an electrode active material-containing layer provided on the current collector, wherein the electrode active material-containing layer contains active material particles and a conductive material that connects the active material particles to each other; wherein the mass ratio of the active material particles:the conductive material:other components in the electrode active material-containing layer is 95 to 99.7:0.3 to 5:0 to 1, wherein the conductive material includes a first elongated carbon material having a first length and a second elongated carbon material having a second length larger than the first length, and wherein the ratio of the second length to the first length is 2 or more and 50 or less.

Positive electrode for lithium-ion rechargeable battery, lithium-ion rechargeable battery, and method for producing positive electrode for lithium-ion rechargeable battery

A cathode active material that is able to improve storage characteristics without deteriorating charging and discharging capacity is provided. By mixing lithium nickel containing composite oxide particles comprising a layered rock-salt type crystal structure, a lithium compound, and an alkali metal compound; calcining the mixed powder at a temperature range of 800&#xb0; C. to 1000&#xb0; C.; washing and removing alkali metal other than lithium; mixing washed calcined particles with a lithium compound again; calcining the mixture in an oxidizing atmosphere at a temperature range of 600&#xb0; C. to 800&#xb0; C., lithium nickel containing composite oxide comprising a layered rock-salt type crystal structure and a peak intensity ratio of (003) plane with respect to (104) plane of 1.2 or more that are obtained by X-ray powder diffraction using Cu-K&#x3b1; ray as an X-ray source is obtained.

Lithium nickel containing composite oxide and manufacturing method thereof, and nonaqueous-electrolyte secondary battery

Growing community of inventors

Nagano, Japan

Nobuyuki Zettsu