Hitachi Maxell, Limited

Hideki Nishihama

Noriyuki Yabushita

Atsushi Yamano

Tetsuo Kawai

Tadashi Sakata

Ryo Nagai

Jinbao Zhao

Shoko Ibuki

A non-aqueous electrolyte battery of the present invention includes a non-aqueous electrolyte containing a lithium salt, a cyclic sultone derivative, and an acid anhydride, wherein the non-aqueous electrolyte contains the cyclic sultone derivative in an amount of 0.3 to 3% by mass and the non-aqueous electrolyte contains the acid anhydride in an amount of 0.3 to 3% by mass. Furthermore, the non-aqueous electrolyte battery includes at least one selected from a cyclic sultone derivative and an acid anhydride, and an electrolyte salt. The electrolyte salt contains lithium salt A and lithium salt B. The lithium salt A is at least one selected from LiBF, LiPF, LiAsF, and LiSbF, and the lithium salt B is a lithium salt other than the lithium salt A. The electrolyte contains the lithium salt A in an amount of 2 mol % or more.

Non-aqueous electrolyte battery

By eliminating a part of sulfur atoms of the polysulfide segment of the formula: &mdash;S &mdash; (m&gE;3) of an organic sulfur compound, a carbon polysulfide is synthesized, which comprises carbon and sulfur as constitutive elements and contains at least 67 wt. % of sulfur and at least 95 wt. % of carbon and sulfur in total, and which has a disulfide linkage formed by most of the sulfur atoms in the molecule and also has a highly uniform structure. A nonaqueous electrolytic battery which has a high capacity and shows a small decrease in capacity in association with cyclic charge and discharge is provided using this carbon polysulfide as an active material for the positive electrode.

Polycarbon sulfide, process for preparing the same and nonaqueous electrolyte battery comprising the same

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Osaka, Japan

Hideki Nishihama