LITHIUM ION SECONDARY BATTERY

PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery in which an increase in internal resistance is suppressed.SOLUTION: A lithium ion secondary battery includes a positive electrode, a negative electrode, a separator and an electrolyte in a battery container. In the lithium ion secondar...

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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
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery in which an increase in internal resistance is suppressed.SOLUTION: A lithium ion secondary battery includes a positive electrode, a negative electrode, a separator and an electrolyte in a battery container. In the lithium ion secondary battery, a cyclic sulfate ester compound, vinylene carbonate (VC), and tris(trimethylsilyl)phosphate are contained in the electrolyte, graphitizable carbon is contained as a negative electrode active material, and the total amount of the cyclic sulfate ester compound, the vinylene carbonate (VC), and the tris(trimethylsilyl)phosphate is 0.6-2.2 mass% with respect to the total amount of the electrolyte.SELECTED DRAWING: Figure 1 【課題】内部抵抗の増加を抑制するリチウムイオン二次電池を提供する。【解決手段】正極、負極およびセパレータと、電解液と、を電池容器内に備えるリチウムイオン二次電池であって、前記電解液に環状硫酸エステル化合物、ビニレンカーボネート（ＶＣ）およびリン酸トリス（トリメチルシリル）を含み、負極活物質として易黒鉛化炭素を含有し、環状硫酸エステル、ビニレンカーボネート及びリン酸トリス（トリメチルシリル）の合計量は、電解液全量に対して０．６〜２．２質量％であるリチウムイオン二次電池。【選択図】図１