NONAQUEOUS ELECTROLYTE SOLUTION, AND NONAQUEOUS ELECTROLYTE BATTERY USING THE SAME

To provide a nonaqueous electrolyte secondary battery in which a good comprehensive performance balance is achieved as to functions, such as a durability performance, a capacity, a resistance, and output characteristics.SOLUTION: A nonaqueous electrolyte battery comprises: positive and negative elec...

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Hauptverfasser: KOTADO MINORU, NAKAZAWA EIJI, OHASHI YOICHI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide a nonaqueous electrolyte secondary battery in which a good comprehensive performance balance is achieved as to functions, such as a durability performance, a capacity, a resistance, and output characteristics.SOLUTION: A nonaqueous electrolyte battery comprises: positive and negative electrodes capable of occluding and releasing metal ions; and a nonaqueous electrolyte solution. The nonaqueous electrolyte solution contains: an electrolyte; a nonaqueous solvent, and at least one compound selected from a group consisting of lithium fluorosulfonate, lithium bis(fluorosulfonyl)imide and lithium difluorophosphate. The negative electrode has a negative electrode active material including Si or Si metal oxide and graphite particles.SELECTED DRAWING: None 【課題】 非水系電解液二次電池において、耐久性能と容量、抵抗、出力特性等の性能につき、総合的な性能のバランスのよい電池を提供すること。【解決手段】 金属イオンを吸蔵・放出しうる正極及び負極、非水系電解液を備える非水系電解液電池であって、該非水系電解液が電解質及び非水系溶媒とともに、フルオロスルホン酸リチウム、リチウムビス(フルオロスルホニル)イミド、ジフルオロリン酸リチウムからなる群より選ばれる少なくとも1種の化合物を含有し、かつ、該負極がSi又はSi金属酸化物と黒鉛粒子とを含有する負極活物質を有することを特徴とする非水系電解液電池とする。【選択図】なし