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    • 5. 发明授权
    • Nonaqueous electrolyte secondary battery
    • 非水电解质二次电池
    • US08021782B2
    • 2011-09-20
    • US12397467
    • 2009-03-04
    • Shinya MiyazakiTatsuyuki Kuwahara
    • Shinya MiyazakiTatsuyuki Kuwahara
    • H01M4/48
    • H01M4/131H01M4/1391H01M4/485H01M4/505H01M4/525H01M10/0525H01M2004/028
    • The present invention provides a nonaqueous electrolyte secondary battery with an excellent packing property and remarkably improved high-temperature cycle characteristics and thermal stability. The nonaqueous electrolyte secondary battery 10 includes a positive electrode plate 11 having a positive electrode active material able to absorb and desorb lithium ions, a negative electrode plate having a negative electrode active material capable of absorption and desorption of lithium ions, and a nonaqueous electrolyte, and the positive electrode active material includes a mixture of material A: LiwNixCoyMnzO2 (where 1.00≦w≦1.30, x+y+z=1, 0.40≦x≦0.50, and 0.30≦y≦0.40) and material B: LiwNixCoyMnzO2 (where 1.00≦w≦1.30, x+y+z=1, 0.30≦x≦0.35, and 0.30≦y≦0.35).
    • 本发明提供一种具有优异的包装性能和显着提高的高温循环特性和热稳定性的非水电解质二次电池。 非水电解质二次电池10包括具有能够吸收和解吸锂离子的正极活性物质的正极板11,具有能够吸收和解吸锂离子的负极活性物质的负极板和非水电解质, 正极活性物质包括材料A:LiwNixCoyMnzO2(其中1.00≦̸ w≦̸ 1.30,x + y + z = 1,0.40& nl; x< lE; 0.50和0.30≦̸ y≦̸ 0.40)和材料B: LiwNixCoyMnzO2(其中1.00≦̸ w≦̸ 1.30,x + y + z = 1,0.30≦̸ x≦̸ 0.35和0.30≦̸ y≦̸ 0.35)。