McDermott Will & Emery LLP
Lithium polymer cell
In a lithium polymer battery of the present invention, a positive electrode, an negative electrode and a separator respectively contain a vinylidene fluoride-hexafluoropropylene copolymer, an electrolyte contains a solvent comprising diethyl carbonate and a solute dissolved in the solvent, and the electrolyte further contains diphenyl ether as an additive.With the use of the above electrolyte, it is possible to improve the thermal stability of the battery containing P(VDF-HFP) in the positive electrode, the negative electrode and the separator and to operate the shutdown function surely, thereby ensuring the excellent safety of the battery.
Matsushita Electric Industrial Co., Ltd.
H Y H H H
H01M Y02E H01M H01M H01M
inventional additional inventional inventional inventional
Shinji Hiroshi Akiko
Mino Yoshizawa Fujino