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    • 6. 发明授权
    • Non-aqueous electrolyte secondary battery
    • 非水电解质二次电池
    • US08067119B2
    • 2011-11-29
    • US12096262
    • 2007-05-18
    • Masaki DeguchiTooru MatsuiHiroshi Yoshizawa
    • Masaki DeguchiTooru MatsuiHiroshi Yoshizawa
    • H01M6/04H01M6/16
    • H01M10/4235H01M2/16H01M4/505H01M4/525H01M10/0525H01M10/0567
    • A non-aqueous electrolyte secondary battery of the present invention includes a positive electrode including an active material absorbing and desorbing lithium ions, a negative electrode including an active material absorbing and desorbing lithium ions, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The separator includes a material containing a substituent group with electron-withdrawing property. The non-aqueous electrolyte includes a non-aqueous solvent and a solute dissolved therein, and the non-aqueous solvent includes at least one selected from the group consisting of a fluorine-containing aromatic solvent, a fluorine-containing cyclic carbonic acid ester, and a fluorine-containing cyclic carboxylic acid ester.The combination of the foregoing separator and the foregoing non-aqueous electrolyte makes it possible to suppress the deterioration in the rate performance of the battery even when the battery is stored under high voltage and high temperature.
    • 本发明的非水电解质二次电池包括:包含吸收和解吸锂离子的活性物质的正极,包含吸收和解吸锂离子的活性物质的负极;插入正极和负极之间的隔膜; 和非水电解质。 隔膜包括含有具有吸电子性的取代基的材料。 非水电解质包含非水溶剂和溶解于其中的溶质,非水溶剂包括选自含氟芳香族溶剂,含氟环状碳酸酯和含氟环状碳酸酯中的至少一种, 含氟环状羧酸酯。 上述隔膜和上述非水电解液的组合使得即使在高电压和高温下储存电池的情况下也可以抑制电池的速率性能的劣化。