Electrolytes for alkaline metal secondary batteries and alkaline metal secondary batteries
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- TOHOKU UNIV
- Filing Date
- 2021-08-27
- Publication Date
- 2026-06-09
AI Technical Summary
【0010】 本発明によれば、リチウム金属などのアルカリ金属を負極材料として用いたアルカリ金属二次電池において、デンドライトの発生を抑制することができる新規なアルカリ金属二次電池用の電解液と、その電解液を用いたアルカリ金属二次電池を提供することが可能となる。
Smart Images
Figure 0007872051000001 
Figure 0007872051000002 
Figure 0007872051000003
Abstract
Claims
1. Non-aqueous solvents and The alkali metal salt dissolved in the aforementioned non-aqueous solvent, The above comprises an alkaline earth metal salt dissolved in the non-aqueous solvent, The aforementioned non-aqueous solvent is glycol ether, The alkali metal salt is at least one salt selected from the group consisting of bis(trifluoromethylsulfonyl)imide alkali metal salts, bis(trifluoromethylsulfonyl)amide alkali metal salts, and bis(fluorosulfonyl)amide alkali metal salts. The alkaline earth metal salt is at least one salt selected from the group consisting of bis(trifluoromethylsulfonyl)imide alkaline earth metal, bis(trifluoromethylsulfonyl)amide alkaline earth metal salt, and bis(fluorosulfonyl)amide alkaline earth metal salt. An electrolyte for an alkali metal secondary battery, wherein the total concentration of the alkali metal salt and the alkaline earth metal salt is 0.2 mol / L or more and 5.0 mol / L or less.
2. The electrolyte for an alkali metal secondary battery according to claim 1, wherein the alkali metal salt comprises at least one of a lithium metal salt and a sodium metal salt, and the alkaline earth metal salt comprises at least one of a calcium metal salt and a barium metal salt.
3. The electrolyte for an alkali metal secondary battery according to claim 2, wherein the alkaline earth metal salt is at least one salt selected from the group consisting of bis(trifluoromethylsulfonyl)imidocalcium, calcium bis(trifluoromethylsulfonyl)amide, calcium bis(fluorosulfonyl)amide, bis(trifluoromethylsulfonyl)imidobarium, barium bis(trifluoromethylsulfonyl)amide, and barium bis(fluorosulfonyl)amide.
4. The electrolyte for an alkali metal secondary battery according to claim 2 or 3, wherein the alkali metal salt is at least one salt selected from the group consisting of bis(trifluoromethylsulfonyl)imide lithium, lithium bis(trifluoromethylsulfonyl)amide, lithium bis(fluorosulfonyl)amide, bis(trifluoromethylsulfonyl)imide sodium, sodium bis(trifluoromethylsulfonyl)amide, and sodium bis(fluorosulfonyl)amide.
5. The electrolyte for an alkali metal secondary battery according to any one of claims 1 to 4, wherein the anion of the alkali metal salt and the anion of the alkaline earth metal salt are the same.
6. An electrolyte for an alkali metal secondary battery according to any one of claims 1 to 5, A positive electrode containing a positive electrode active material capable of intercalating and releasing alkali metal ions, An alkali metal secondary battery comprising a negative electrode containing an alkali metal.