Non-aqueous electrolyte lithium secondary battery
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United States of America Patent
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Aug 14, 2001
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N/A
app pub date -
Aug 21, 1997
filing date -
Aug 27, 1996
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Abstract
A non-aqueous electrolyte lithium secondary battery comprising a negative electrode of spinel-type lithium-titanium oxide with improved overcharge and overdischarge characteristics is disclosed. In this battery, the rechargeable electric capacity of the negative electrode is adjusted to be smaller than that of the positive electrode. In a preferable mode, the negative electrode may further comprise a material which has more negative potential than that of the lithium-titanium oxide, and shows electrochemical reversibility. An electrolyte comprising ethylene carbonate and LiN(CF.sub.3 SO.sub.2).sub.2 or LiN(C.sub.2 F.sub.5 SO.sub.2).sub.2 is preferable.
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