Alkali ion conducting plastic crystals
A solid electrolyte represented by general formula Li y SiR x (MO 4 ), where x is an integer from 1 to 3 inclusive, y=4−x, each R present is independently C1-C3 alkyl or C1-C3 alkoxy, and M is sulfur, selenium, or tellurium. Methods of making the solid electrolyte include combining a phenylsilane and a first acid to yield mixture including benzene and a second acid, and combining at least one of an alkali halide, and alkali amide, and an alkali alkoxide with the second acid to yield a product d represented by general formula Li y SiR x (MO 4 ) y . The second acid may be in the form of a liquid or a solid. The phenylsilane includes at least one C1-C3 alkyl substituent or at least one C1-C3 alkoxy substituent, and the first acid includes at least one of sulfuric acid, selenic acid, and telluric acid.
1. A solid electrolyte represented by general formula [AB x−y C y ] y− [M] y + , wherein:
A is tellurium,
x is 6,
y=1 to x −1, inclusive,
each B is independently a halogen, a cyano group, C1 or C2 alkoxy, or acetate,
each C is independently sulfate, selenite, fluorophosphate, or trifluoromethane phosphate,
M is an alkali metal,
and [AB x−y C y ] y− [M] y + is ionically neutral.
2. The solid electrolyte of claim 1 , wherein each B is independently C1 or C2 alkoxy.
3. The solid electrolyte of claim 1 , wherein at least one B is methoxy.
4. The solid electrolyte of claim 1 , wherein at least one B is ethoxy.
5. The solid electrolyte of claim 1 , wherein at least one B is a halogen.
6. The solid electrolyte of claim 1 , wherein at least one B is acetate.
7. The solid electrolyte of claim 1 , wherein y=1.
8. The solid electrolyte of claim 1 , wherein y=2.
9. The solid electrolyte of claim 1 , wherein y=3.
10. The solid electrolyte of claim 1 , wherein y=4.
11. The solid electrolyte of claim 1 , wherein y=5.
12. The solid electrolyte of claim 1 , wherein [AB x−y C y ] y− [M] y + is in the form of a waxy solid.
13. The solid electrolyte of claim 1 , wherein M is lithium.
14. The solid electrolyte of claim 1 , wherein each C is sulfate.