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发明公开
CN110024198A 非水电解质二次电池 有权

非水电解质二次电池
摘要：
本发明的目的之一在于，抑制使用镍含有率高的正极活性物质的电池之间的开路电压的波动。本发明涉及一种非水电解质二次电池，其具备：正极，其包含正极合剂；负极；和，非水电解质，其包含非水溶剂和溶解于前述非水溶剂的锂盐，前述正极合剂包含正极活性物质和磷酸盐，前述正极活性物质包含用式(1)：LixNi1-yM1yO2(式中，0.9≤x≤1.1、0≤y≤0.7，M1为选自由Co、Mn、Fe、Ti、Al、Mg、Ca、Sr、Zn、Y、Yb、Nb、Cr、V、Zr、Mo、W、Cu、In、Sn和As组成的组中的至少一种元素。)表示的锂-镍复合氧化物，前述非水溶剂包含用式(2)：F3C-CH2-CO-O-R1(式中，R1为C1-3烷基。)表示的三氟丙酸酯。
摘要（英）：

One purpose of the present invention is to suppress variation of the open-circuit voltage among batteries that use a positive electrode active material having a high nickel content. The present invention relates to a nonaqueous electrolyte secondary battery which is provided with a positive electrode containing a positive electrode mixture, a negative electrode, and a nonaqueous electrolyte containing a nonaqueous solvent and a lithium salt that is dissolved in the nonaqueous solvent, and wherein: the positive electrode mixture contains a positive electrode active material and a phosphate salt; the positive electrode active material contains a lithium-nickel composite oxide represented by formula (1) LixNi1-yM1yO2 (wherein 0.9 <= x <= 1.1, 0 <= y <= 0.7 and M1 represents at least one element selected from the group consisting of Co, Mn, Fe, Ti, Al, Mg, Ca, Sr, Zn, Y, Yb, Nb, Cr, V, Zr, Mo, W, Cu, In, Sn and As); and the nonaqueous solvent contains a trifluoropropionic acid ester represented by formula (2) F3C-CH2-CO-O-R1 (wherein R1 represents a C1-3 alkyl group).

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