Nonaqueous electrolyte lithium secondary cell
AssigneesGS Yuasa Corporation, The Kansai Electric Power Co., Inc.
InventorsHiroe Nakagawa, Syuichi Izuchi, Takaaki Iguchi, Shigeru Sano, Kenichi Takeuchi, Keiichi Yamamoto
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Abstract
A nonaqueous electrolyte lithium secondary cell comprising a positive electrode (1), a negative electrode (2) and a nonaqueous electrolyte containing a lithium salt is characterized by that the nonaqueous electrolyte contains a room temperature molten salt as a main component, a material wherein a working potential of the negative electrode (2) is nobler by above 1V than a potential of a metallic lithium is used for a negative active material of the negative electrode. This nonaqueous electrolyte lithium secondary cell has excellent safety and cell performance.
Claims7
A nonaqueous electrolyte lithium secondary cell comprising a nonaqueous electrolyte containing a lithium salt, a positive electrode, a negative electrode and a separator characterized by that;
- a material which contains a room temperature molten salt as a main component and is in liquid-state, is provided as the nonaqueous electrolyte,
- the negative electrode contains a negative active material wherein a working potential of the negative electrode is nobler by above 1V than a potential of a metallic lithium, and
- the foregoing liquid-state nonaqueous electrolyte is contained in the positive electrode, the negative electrode and the separator.
A nonaqueous electrolyte lithium secondary cell comprising a nonaqueous electrolyte containing a lithium salt, a positive electrode, a negative electrode and a separator characterized by that;
- a material which contains a room temperature molten salt as a main component and is in liquid-state, is provided as the nonaqueous electrolyte, and a material which contains a room temperature molten salt as a main component and is in solid-state by combining a polymer, is provided as the nonaqueous electrolyte,
- the negative electrode contains a negative active material wherein a working potential of the negative electrode is nobler by above 1V than a potential of a metallic lithium,
- the foregoing liquid-state nonaqueous electrolyte is contained in the positive electrode and the negative electrode, and
- the foregoing solid-state nonaqueous electrolyte is contained in the separator.
Dependencies are inferred from the claim text.