Matsushita Electric Industrial Co., Ltd.

Tatsuo Mori

Nobuharu Koshiba

Takashi Akiyama

Akira Kakinuma

Tadayoshi Takahashi

Kenichi Takata

Emi Asaka

Atsushi Ohtsuka

Shinichi Waki

The present invention relates to an organic electrolyte battery configured by sealing power generating elements comprising an organic electrolyte by a positive can, a negative can and a gasket, wherein said organic electrolyte includes a lithium salt containing a sulfonic acid group as a solute and at least one selected from a group consisting of sulfolane, 3-methyl sulfolane and Tetraglyme as a solvent. The aim of the invention is to provide an organic electrolyte battery having an excellent discharge performance in a low temperature environment and a superior reliability during long term storage, as well as a high temperature resistance which enables the battery to be mounted onto a substrate according to the Reflow method.

Organic electrolyte battery

The invention provides a lithium secondary battery with improved withstanding overcharge and overdischarge characteristics which employs a cathode active material of lithium-containing manganese dioxide having a crystal structure of the Ramsdellite-type. An electrolyte combined with the cathode includes LiN(CF.sub.3 SO.sub.2).sub.2 as a solute. The solute is preferably dissolved in ethylene carbonate. A graphite or LiAl alloy is applied for an anode. LiAl alloy is corrosion-resistant, thereby improving high temperature as well as charge-discharge cycle life characteristics.

Organic electrolyte lithium secondary battery

The subject invention is a lithium battery comprising a positive electrode mainly of vanadium pentoxide, a negative electrode mainly of lithium doped niobium pentoxide, and, an electrolyte mainly of an anhydrous solvent with dissolved lithium salt. By using for the said niobium pentoxide a mixture of T type and H type crystals heat treated at 850.degree. to 1300.degree. C., preferably 850.degree. to 1100.degree. C., a lithium battery having superior charging cycle characteristics and also having high discharge voltage is obtained.

Lithium rechargeable battery and method of making the same

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Ibaraki, Japan

Tatsuo Mori