Adams & Wilks
Non-aqueous electrolyte secondary battery
 A 1.5 V non-aqueous electrolyte secondary battery having high energy density, excellent charge and discharge characteristics and long cycle life is provided. The non-aqueous electrolyte secondary battery uses, as the negative electrode active material, lithium-containing silicon oxide represented by the compositional formula Li.sub.x SiO.sub.y and defined such that the lithium content x and oxygen amount y are satisfied with 1.5.ltoreq.x.ltoreq.4.5 and 0<y<2, respectively, and also uses, as the positive electrode, lithium-containing titanium oxide represented by the general formula Li.sub.x Ti.sub.y O.sub.4 wherein 0.ltoreq.x.ltoreq.3 and 1.6.ltoreq.y.ltoreq.2.2 or lithium-containing iron sulfide represented by the general formula Li.sub.x FeS.sub.y wherein x.ltoreq.1.1 and 0.5.ltoreq.y.ltoreq.2.5, so that a secondary battery of about 1.5 V having high energy density, less inner resistance and excellent charge and discharge characteristics can be obtained. The non-aqueous electrolyte secondary battery has high charge and discharge efficiency, does not cause defect such as inner short-circuit due to formation of dendrite, and it is very stable with a long cycle life. 
Seiko Instruments Inc.
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inventional inventional additional additional additional inventional inventional
Hideharu Shinichi Kensuke Tsugio Akifumi Shunji
Onodera Takasugi Tahara Sakai Sakata Watanabe