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    • 4. 发明授权
    • Positive electrode active material for lithium ion electric storage device, and lithium ion electric storage device using the same
    • 锂离子蓄电装置用正极活性物质及使用其的锂离子蓄电装置
    • US08310811B2
    • 2012-11-13
    • US12623106
    • 2009-11-20
    • Tsutomu FujiiOsamu Hatozaki
    • Tsutomu FujiiOsamu Hatozaki
    • H01G9/00H01M4/88
    • H01M4/587H01M10/052H01M10/0569
    • [Problem] The present invention aims to enhance a characteristic of a lithium ion electric storage device upon charging or discharging with high load, and increasing a working temperature range thereof.[Means for Solving Problem] In a positive electrode active material used for a lithium ion electric storage device, the BET specific surface area is 1500 m2/g or more and 3000 m2/g or less, the ratio A of the pore volume within the range of the pore diameter of 0.6 nm or more and less than 1 nm to the pore volume within the range of the pore diameter of 0.6 nm or more and 200 nm or less in the active material satisfies 0≦A≦0.80, and the ratio B of the active material of the pore volume within the range of the pore diameter of 1 nm or more and 6 nm or less to the pore volume within the range of the pore diameter of 0.6 nm or more and 200 nm or less in the active material satisfies 0.20≦B≦1.0. By virtue of this structure, the lithium ion electric storage device can be provided that is excellent in the charging/discharging characteristic when it is given a high load, and that can satisfactorily operate even under an environment of −30° C.
    • 本发明旨在提高锂离子蓄电装置在高负荷充放电时的特性,提高其工作温度范围。 解决问题的手段在锂离子蓄电装置的正极活性物质中,BET比表面积为1500m 2 / g以上3000m 2 / g以下, 在活性物质的孔径为0.6nm以上且200nm以下的范围内的孔径为0.6nm以上且小于1nm的孔径的范围满足0< nlE; A≦̸ 0.80, B的孔体积的活性物质在孔径为1nm以上且6nm以下的范围内的孔体积在活性物质的孔径为0.6nm以上且200nm以下的范围内 材料满足0.20≦̸ B≦̸ 1.0。 通过这样的结构,能够提供充电/放电特性优异的锂离子蓄电装置,即使在-30℃的环境下也能令人满意地进行充电。