US 7,510,806 B2
Lithium secondary battery including a lithium bis(trifluoromethylsulfonyl)imide electrolyte and a glass fiber separator
Seiji Yoshimura, Kobe (Japan); Naoki Imachi, Kobe (Japan); Keiji Saishou, Kobe (Japan); and Masanobu Takeuchi, Kobe (Japan)
Assigned to SANYO Electric Co., Ltd., Osaka (Japan)
Filed on May 10, 2004, as Appl. No. 10/841,823.
Claims priority of application No. 2003-131948 (JP), filed on May 09, 2003.
Prior Publication US 2004/0234863 A1, Nov. 25, 2004
Int. Cl. H01M 2/16 (2006.01); H01M 4/58 (2006.01); H01M 6/04 (2006.01)
U.S. Cl. 429—247  [429/231.95; 429/341] 4 Claims
OG exemplary drawing
 
1. 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 0.5˜5 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.