Sanyo Electric Co., Ltd.

Sanyo Energy Tottori Co., Ltd

Satoru Naruse

Masahiro Imanishi

Nobuhiro Nishiguchi

Seiji Morita

Tomoyuki Shose

Yasuo Akai

Masao Kondou

Yoshitaka Minamida

Satoru Fukuoka

Shunsuke Uegaki

Masayuki Muraki

Shin-ichiro Sakaguchi

A positive electrode active material for a nonaqueous electrolyte battery. The positive electrode active material has been manufactured through a mixing step and a heating step. In the mixing step, a mixture is produced by mixing niobium pentoxide (NbO) with lithium hydroxide (LiOH) at a molar ratio of 1:1. In the heating step, the mixture is heated in an atmosphere of air at substantially 800&#xb0; C. The positive electrode active material having been produced through the mixing process and the heating process causes the plateau potential in a discharge to be approximately 1.0 [V] for lithium. And the nonaqueous electrolyte battery using the positive electrode active material can operate at a voltage of approximately 1.0 [V].

Active material containing niobium compound for use in nonaqueous electrolyte battery and nonaqueous electrolyte battery with positive electrode containing the active material

A non-aqueous electrolyte secondary battery uses, as its positive electrode or negative electrode, an electrode containing an active material and a conductive agent, the active material being made of a mixture of a molybdenum dioxide and a lithium titanium oxide in a weight ratio (molybdenum dioxide: lithium titanium oxide) of from 90:10 to 50:50, and the conductive agent containing graphitized vapor grown carbon fiber and massive graphite. The massive graphite has an average particle size of 10 &#x3bc;m or greater.

Non-aqueous electrolyte secondary battery

The present invention provides a cell that does not impair heat resistant safety and electrochemical characteristics such as a discharge characteristic, and enhances long-period reliability. In the cell of the present invention, a nonaqueous solvent has, among compounds represented by the following general formula (1), at least one solvent having a boiling point of 200&#xb0; C. or higher, and has, among compounds represented by the following general formula (1), at least one solvent having a boiling point of lower than 200&#xb0; C.; and the total volume ratio at 23&#xb0; C. of the compounds represented by the following general formula (1) is 95 to 100 percent of the nonaqueous solvent,X&#x2014;(O&#x2014;CH)n-O&#x2014;Y&#x2003;&#x2003;(1)(where X and Y are independently an alkyl group (number of carbons: 1-4), and n is 1-5).

Heat resistant lithium cell

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Osaka, Japan

Satoru Naruse