Patent ID: 7097944

Claim:
A nonaqueous secondary cell comprising: a positive electrode capable of absorbing and releasing lithium; a negative electrode capable of absorbing and releasing lithium; and an electrolyte comprising a nonaqueous solvent and a lithium salt dissolved therein, wherein said electrolyte contains a vinyl ethylene carbonate compound represented by the general formula (1), wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 represent each independently a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms, said electrolyte contains at least a compound selected from the group consisting of a cyclic sulfonic acid ester, a cyclic sulfuric acid ester, and a cyclic acid anhydride, and said electrolyte contains the cyclic sulfonic acid ester, wherein said cyclic sulfonic acid ester comprises 1,3-propene sultone.