| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a means for preventing the generation of a hydrofluoric acid in the case that an LiMnNi oxide is used for a lithium secondary battery. <P>SOLUTION: The battery includes a negative electrode that permits the storage and release of lithium, a positive electrode containing an active substance expressed by a chemical formula as shown below, and an electrolyte in which an aziridine compound having one or more aziridine rings is added to a nonaqueous electrolyte solution. The composition of the above-mentioned active substance in the positive electrode is Li<SB>x</SB>Ni<SB>1-y-z</SB>Co<SB>y</SB>M<SB>z</SB>A<SB>2</SB>. Where elements M are one or more elements out of a transition metal or a lanthanoid metal selected from Al, Cr, Mn, Fe, Mg, La, Ce, Sr and V. The element A is one or more elements selected from O, F, S and P. Symbols x, y and z that represent the foregoing composition ratios are 1.0≤x≤1.1, 0.01≤y≤0.1, 0.01≤z≤0.5. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
