Eulytite solid acid electrolytes for electrochemical devices
AssigneeCalifornia Institute of Technology
InventorsCalum Chisholm, Sossina M. Haile
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Abstract
Improved solid acid electrolyte materials, methods of synthesizing such materials, and electrochemical devices incorporating such materials are provided. The stable electrolyte material comprises a solid acid in a eulytine structure capable of undergoing rotational disorder of oxyanion groups and capable of extended operation at elevated temperatures, that is, solid acids having hydrogen bonded anion groups; a superprotonic disordered phase; and capable of operating at temperatures of ˜100° C. and higher.
Claims28
A compound of Formula I:
- M4aHb(XOc)3a,
- wherein
- M is at least one metal each independently a metal cation;
- X is at least one member each independently selected from the group consisting of P, Si, As, Ge, S, Se, W, Cr and V;
- and
- each of subscript a, b and c are independently a positive real number.
A proton conducting membrane comprising a solid acid of Formula I:
- M4aHb(XOc)3a,
- wherein M is at least one metal each independently a metal cation;
- X is at least one member each independently selected from the group consisting of P, Si, As, Ge, S, Se, W, Cr and V;
- and
- each of subscript a, b and c are independently a positive real number.
A method of making a compound of Formula I:
- M4aHb(XOc)3a,
- wherein M is at least one metal each independently a metal cation;
- X is at least one member each independently selected from the group consisting of P, Si, As, Ge, S, Se, W, Cr and V;
- each of subscript a, b and c are independently a positive real number;
- comprising the steps of:
- a) contacting said metal with a suitable oxyanion and a suitable hydrogen source;
- b) conducting said method of making under appropriate reaction conditions so as to make a compound of Formula I.
Dependencies are inferred from the claim text.