| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high-capacity type nonaqueous electrolyte secondary battery exhibiting satisfactory cycle characteristics, even when charge termination voltage is raised by using a positive electrode active material Li(NiCoMn)O<SB>2</SB>containing a less quantity of Ni, in order to set the irreversible capacity of a positive electrode to be smaller than that of the negative electrode. <P>SOLUTION: This nonaqueous electrolyte secondary battery comprises the positive and negative electrodes, a separator and a nonaqueous electrolyte; the positive electrode contains a Ni-containing active material, represented by Li(Ni<SB>a</SB>Mn<SB>b</SB>Co<SB>1-a-b</SB>)<SB>1-c</SB>N<SB>c</SB>O<SB>2</SB>; and its charge termination voltage is 4.25 to 4.50 V. In the Formula, 0.1≤a≤0.5, 0.2≤b≤0.4, 0.003≤c≤0.05 and N is one or more kinds selected from among Y, Zr and Mo. <P>COPYRIGHT: (C)2007,JPO&INPIT |
