LITHIUM ION SECONDARY BATTERY

To provide a technique which has high strength, excellent ionic conductivity, and excellent electrical characteristics.SOLUTION: A lithium ion secondary battery includes a positive electrode, a negative electrode, and a polymer electrolyte. The polymer electrolyte contains a lithium salt, an ionic l...

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Bibliographische Detailangaben
Hauptverfasser:	TOZAKI TETSUYA, NISHIKAWA AKIYOSHI, KAJI SOKI, HOSHIHARA YUJI
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:	To provide a technique which has high strength, excellent ionic conductivity, and excellent electrical characteristics.SOLUTION: A lithium ion secondary battery includes a positive electrode, a negative electrode, and a polymer electrolyte. The polymer electrolyte contains a lithium salt, an ionic liquid, and a high molecular polymer, and the ionic liquid contains a bis (fluorosulfonyl) imide anion as an anion component. The content of the lithium salt is equal to 2 mol/kg or more and 6 mol/kg or less with respect to the sum of the contents of the ionic liquid and the high molecular polymer. The content of the high molecular polymer is equal to 25% by mass or more and 40% by mass or less with respect to the sum of the contents of the ionic liquid and the high molecular polymer.SELECTED DRAWING: None 【課題】強度が高いとともに、イオン伝導度に優れ、電気特性に優れる技術を提供する。【解決手段】リチウムイオン二次電池は、正極と、負極と、高分子電解質と、を備えるリチウムイオン二次電池であって、前記高分子電解質は、リチウム塩と、イオン液体と、高分子ポリマーと、を含み、前記イオン液体は、アニオン成分として、ビス（フルオロスルホニル）イミドアニオンを含み、前記リチウム塩の含有量は、前記イオン液体と前記高分子ポリマーとの含有量の和に対して、２ｍｏｌ／ｋｇ以上６ｍｏｌ／ｋｇ以下であり、前記高分子ポリマーの含有量は、前記イオン液体と前記高分子ポリマーとの含有量の和に対して、２５質量％以上４０質量％以下であることを特徴とする。【選択図】なし