| abstract |
Problem of the present invention is to provide the secondary cell making electrolyte not burning, fail safe higher.Secondary cell of the present invention has: comprise absorption, discharge the positive pole of the oxide of lithium ion; Comprise absorption, discharge the negative pole of the material with carbon element of lithium ion; And electrolyte, electrolyte comprises the lithium salts of more than 1.5mol/L or comprises the lithium salts of more than 1.0mol/L and the phosphate derivative of 20 more than volume %. |