Inorganic coordination polymers as gelling agents
Use of a compound of formula (I) wherein R 1 and R 2 are selected independently from each other from C1-C10 alkyl, which may be substituted by one or more F, or wherein R 1 and R 2 are linked and jointly selected from C2-C3 alkanediyl forming together with the group —OPO—a five- or six-membered heterocycle which may be substituted by one or more substituents selected from F and optionally fluorinated C 1 -C 10 alkyl, as gelling agent in an aprotic organic solvent or solvent mixture.
1. A method for preparing a gel electrolyte composition, comprising adding a compound of formula (I) to an aprotic organic solvent or to a mixture of aprotic organic solvents, to obtain a gel electrolyte composition
wherein
R 1 and R 2 are each independently C 1 -C 10 alkyl, which may be substituted by one or more F,
or wherein R 1 and R 2 are linked and are jointly C 2 -C 3 alkanediyl forming together with the group —OPO— a five- or six-membered heterocycle which may be substituted by one or more substituents selected from the group consisting of F and optionally fluorinated C 1 -C 10 alkyl.
2. The method according to claim 1 , wherein at least one of R 1 and R 2 in the compound of formula (I) is substituted by at least one F.
3. The method according to claim 1 , wherein at least one of R 1 and R 2 in the compound of formula (I) is substituted by at least three F.
4. The method according to claim 1 , wherein at least one of R 1 and R 2 in the compound of formula (I) contains at least one CF 3 -group.
5. The method according to claim 1 , wherein R 1 and R 2 are each independently C 1 -C 4 alkyl which is substituted by one or more F, or wherein R 1 and R 2 are linked and are jointly C 2 -alkanediyl which may be substituted by one or more substituents selected from the group consisting of F and optionally fluorinated C 1 -C 10 alkyl.
6. The method according to claim 1 , wherein the compound of formula (I) is selected from the group consisting of LiOOP(OCH 2 CF 3 ) 2 , LiOOP(OCH(CF 3 ) 2 ) 2 , LiOOP(On-C 4 F 9 ) 2 , and LiOOP(OC(CF 3 ) 3 ) 2 .
7. The method according to claim 1 , wherein the compound of formula (I) is present in the gel electrolyte composition in a concentration range of 0.01 to 5 mol/L based on the total volume of the composition.
8. The method according to claim 1 , wherein the aprotic organic solvent or mixture of aprotic organic solvents comprises a cyclic or a noncyclic organic carbonate.
9. The method according to claim 1 , wherein the aprotic organic solvent or mixture of aprotic organic solvents further comprises at least one conducting salt.
10. A process for preparing a compound of formula (I)
wherein
R 1 and R 2 are each independently C 1 -C 10 alkyl, which may be substituted by one or more F,
or wherein R 1 and R 2 are linked and are jointly C 2 -C 3 alkanediyl forming together with the group —OPO— a five- or six-membered heterocycle which may be substituted by one or more substituents selected from the group consisting of F and optionally fluorinated C 1 -C 10 alkyl,
the process comprising: reacting LiOR 1 , LiOR 2 and/or LiOR 1 R 2 OLi with phosphorus pentoxide.