Electrolytic solution for fluoride ion battery and fluoride ion battery
View Patent ↗An electrolytic solution for a fluoride ion battery includes: a fluoride salt; and a solvent for dissolving the fluoride salt, in which the solvent is an ether-containing material having a cation and an anion, and in the cation, an ether group represented by —CH 2 —O—R (where R represents an alkyl group or a fluoroalkyl group) binds to a cation central element which is N or P.
1. A fluoride ion battery comprising:
a positive electrode active material layer;
a negative electrode active material layer; and
an electrolyte layer that is formed between the positive electrode active material layer and the negative electrode active material layer,
wherein the electrolyte layer comprises an electrolytic solution comprising:
a fluoride salt; and
a solvent for dissolving the fluoride salt, wherein
the solvent comprises:
a cation that comprises an ether group, an R1 group, an R2 group, and an R3 group; and
an anion,
wherein, in the cation,
the ether group is represented by —CH 2 —O—R and binds directly to a cation central element that is N or P,
R1 to R3 directly bind to the cation central element and are an alkyl group having 1 or 2 carbons or fluoroalkyl group having 1 or 2 carbons, or R1 is an alkyl group having 1 or 2 carbons or fluoroalkyl group having 1 or 2 carbons and R2 and R3 combine to form a cyclic structure, and
R represents an alkyl group or a fluoroalkyl group, and
a concentration of the fluoride salt in the electrolyte solution is ranges from 0.7 mol % to 10 mol %.
2. The fluoride ion battery according to claim 1 , wherein the ether-containing material is an ionic liquid.
3. The fluoride ion battery according to claim 1 , wherein the cation central element is N.
4. The fluoride ion battery according to claim 1 , wherein the cation has a cyclic structure containing the cation central element.