LITHIUM ION SECONDARY BATTERY

PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery which is superior in cycle and input characteristics and safety.SOLUTION: A lithium ion secondary battery comprises: a positive electrode; a negative electrode; and an electrolytic solution. The negative electrode includes easily graph...

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Bibliographische Detailangaben
Hauptverfasser:	ABE MIE, XING XIANJIANG
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery which is superior in cycle and input characteristics and safety.SOLUTION: A lithium ion secondary battery comprises: a positive electrode; a negative electrode; and an electrolytic solution. The negative electrode includes easily graphitizable carbon as a negative electrode active material. The electrolytic solution includes: a cyclic carbonate and a chain carbonate as a nonaqueous solvent; and lithium bis(oxalato)borate and vinylene carbonate as an additive agent. The content of each of the lithium bis(oxalato)borate and vinylene carbonate is 0.1-1.5 mass% relative to a total amount of the electrolyte.SELECTED DRAWING: None 【課題】サイクル特性、入力特性及び安全性に優れるリチウムイオン二次電池を提供する。【解決手段】正極、負極、電解液と、を備えるリチウムイオン二次電池であって、負極は易黒鉛化炭素を負極活物質として含み、電解液は、非水系溶媒として環状カーボネート、鎖状カーボネート及び添加剤としてリチウムビス（オキサラト）ボレート及びビニレンカーボネートを含む。リチウムビス（オキサラト）ボレート及びビニレンカーボネートのそれぞれ含有量は、電解液の全量に対して、０．１質量％〜１．５質量％であるリチウムイオン二次電池。【選択図】なし