Patent ID: 7510806

Claim:
A lithium secondary battery comprising a positive electrode, a negative electrode, a separator and a nonaqueous electrolyte comprising a solute and a solvent, wherein the separator comprises a glass fiber, the positive electrode is a lithium manganese oxide having a spinel structure, the negative electrode comprises a lithium-aluminum-manganese alloy having a manganese content in a range of 0.5Ëœ5 weight %, the solute of the electrolyte is lithium bis(trifluoromethylsulfonyl)imide, and the solvent of the electrolyte is a mixture of propylene carbonate and a polyethylene glycol dialkyl ether, wherein the polyethylene glycol is selected from the group consisting of diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, diethylene glycol diethyl ether, triethylene glycol diethyl ether.