| 摘要 |
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.
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