| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain an enough charge-discharge cycle property with charge-discharge efficiency improved by restraining degradation of a negative electrode active material separated in a columnar shape and generated on a surface of a negative electrode collector by charging and discharging in a lithium secondary cell equipped with a positive electrode, a negative electrode using an alloying material with lithium for a negative electrode active material and a nonaqueous electrolyte using a nonaqueous electrolytic solution with a solute dissolved in a nonaqueous solvent. <P>SOLUTION: The lithium secondary cell is equipped with a positive electrode 12, a negative electrode 13 using an alloying material with lithium for a negative electrode active material and a nonaqueous electrolyte using a nonaqueous electrolytic solution with a solute dissolved in a nonaqueous solvent. A negative electrode provided with a thin layer of the above negative electrode active material on a surface of the negative electrode collector 13a is used, and also, a heterocyclic compound including S and/or O in its ring is added to the above nonaqueous electrolytic solution. <P>COPYRIGHT: (C)2004,JPO |
