Sony Corporation

Sony Computer Entertainment Inc.

Fumiko Hara

Tsuyoshi Sugiyama

Michiko Komiyama

Fumito Kameyama

Kenichi Kawase

Taku Sugawara

Takahiro Fujii

Mashio Shibuya

Shinji Kimura

Yusuke Fujishige

Carsten Schwesig

Display panel or screen with an animated graphical user interface

The present invention uses a mixture of spherical carbonaceous materials having different average particle sizes as an anode active material in an anode composite mixture layer of an anode. The spherical carbonaceous material of large particle size decreases the reaction with non-aqueous electrolyte solution to suppress the decrease in battery capacity, form clearances having suitable sizes in the anode composite mixture layer, and retain the non-aqueous electrolyte solution. The clearances in the anode composite mixture layer are efficiently filled with the carbonaceous material of small particle size while spaces capable of suitably retaining the non-aqueous electrolyte solution are left unfilled. Thus, the volume density of the anode composite mixture layer is improved and the battery capacity is increased. Accordingly, energy density can be increased without deteriorating battery characteristics.

Nonaqueous electrolyte battery

A non-aqueous electrolyte secondary battery has a positive electrode having a positive electrode collector, on which a positive electrode active material layer containing a positive electrode active material as a complex oxide of Li and transition metals are formed, and a negative electrode having a negative collector, on which a negative electrode active material layer is formed. The non-aqueous electrolyte secondary battery is a gel or solid non-aqueous electrolyte secondary battery having a battery device in which a positive electrode and a negative electrode are laminated with an electrolyte layer therebetween in a film-state packaging member constructed by metal foil laminated films, and containing a lithium salt, a non-aqueous solvent, and a polymer material. The concentration in mass ratio of a free acid in the electrolyte layer is 60 ppm and less. Average particle diameter of the positive electrode active material lies in a range from 10 to 22 &#x3bc;m, the minimum particle diameter is 5 &#x3bc;m or larger, the maximum particle diameter is 50 &#x3bc;m or smaller, and specific surface of the positive electrode active material is 0.25 m/g or smaller. Lithium carbonate (LiCO) contained in the positive electrode active material is 0.15 percent by weight and less. Moisture contained in the positive electrode active material is 300 ppm and less.

Non-aqueous electrolyte secondary battery

Growing community of inventors

Fukushima, Japan

Fumiko Hara