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CN102544572A 锂离子二次电池、正极活性物质、正极、电动工具、电动车辆及电力储存系统 有权 转让

锂离子二次电池、正极活性物质、正极、电动工具、电动车辆及电力储存系统
Abstract:
本发明涉及锂离子二次电池、正极活性物质、正极、电动工具、电动车辆及电力储存系统。更具体地，本发明的锂离子二次电池包括正极、负极和电解液，其中正极包含第一锂复合氧化物和由下式(1)表示的第二锂复合氧化物作为正极活性物质，以及第二锂复合氧化物在第一循环的充放电期间的单位体积充电容量(相对于锂金属)比第一锂复合氧化物大，并且第二锂复合氧化物在第一循环的充放电期间的放电电压(相对于锂金属)比第一锂复合氧化物低，Li1+a(MnbCocNi1-b-c)1-aO2… (1)其中，a、b和c满足0＜a≤0.25、0.5≤b＜0.7以及0≤c＜1-b的关系。
Abstract(English):

A lithium ion secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution, wherein the positive electrode includes a first lithium composite oxide and a second lithium composite oxide expressed by the following equation (1), as a positive electrode active material, and a charge capacity (vs lithium metal) per unit volume during a charge and discharge of a first cycle is larger in the second lithium composite oxide compared to the first lithium composite oxide, and a discharge voltage (vs lithium metal) during the charge and discharge of the first cycle is lower in the second lithium composite oxide compared to the first lithium composite oxide, Li1+a(MnbCocNi1-b-c)1-aO2 . . . (1), where a, b, and c satisfy relationships of 0

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