Claims
- 1. An electrolyte tile consisting essentially of a Li/Na carbonate with a Li.sub.2 CO.sub.3 mole percent selected from the group consisting of about 30 to 40 and 55 to 80.
- 2. The electrolyte tile as defined in claim 1 further including about 70 to 60 and 45 to 20 mole percent Na.sub.2 CO.sub.3, respectively relative to the Li.sub.2 CO.sub.3 mole percent.
- 3. The electrolyte tile as defined in claim 1 wherein the mole percent of Li.sub.2 CO.sub.3 is about 55 to 80 mole percent Li.sub.2 CO.sub.3.
- 4. The electrolyte tile as defined in claim 1 wherein the mole percent of Li.sub.2 CO.sub.3 is about 60 to 75 mole percent Li.sub.2 CO.sub.3.
- 5. The electrolyte tile as defined in claim 3 further including about 45 to 25 mole percent Na.sub.2 CO.sub.3.
- 6. The electrolyte tile as defined in claim 4 further including about 40 to 25 mole percent Na.sub.2 CO.sub.3.
- 7. The electrolyte tile as defined in claim 1 wherein said Li/Na carbonate includes at least one phase selected from the group consisting of solid Li.sub.2 CO.sub.3, solid Na.sub.2 CO.sub.3, molten Li.sub.2 CO.sub.3 and molten Na.sub.2 CO.sub.3.
- 8. The electrolyte tile as defined in claim 7 wherein the electrolyte tile is at a temperature between about 550.degree. to 750.degree. C.
- 9. The electrolyte tile as defined in claim 1 further including an electrolytic cell which includes the carbonate electrolyte wherein an impedance of the cell is about 50% less than for an electrolytic cell having a eutectic Li/Na carbonate electrolyte.
- 10. The electrolyte tile as defined in claim 1 further including an alkaline earth carbonate.
- 11. An electrolyte tile consisting essentially of a CaBaLiNa carbonate having Ca carbonate and Ba carbonate less than about 15 mole percent each and more than about 1 mole percent.
- 12. The electrolyte tile as defined in claim 11 wherein said carbonate has a composition positioned along a quaternary eutectoid surface.
- 13. The electrolyte tile as defined in claim 11 further including an alkaline earth carbonate.
- 14. The electrolyte tile as defined in claim 11 wherein the Ca carbonate has an equivalent mole percent to Ba carbonate.
- 15. The electrolyte tile as defined in claim 11 having a melting point of about 450.degree. C.
- 16. A fuel cell comprised of:
- a cathode;
- an anode; and
- an electrolyte tile consisting essentially of a carbonate selected from the group consisting of a Li/Na carbonate having a Li.sub.2 CO.sub.3 mole percent of about 60-75 and a CaBaLiNa carbonate having Ca and Ba mole percents of about 2-10.
- 17. The fuel cell as defined in claim 16 wherein the Li.sub.2 CO.sub.3 is greater than about 50 m/o.
CONTRACTUAL ORIGIN OF THE INVENTION
The United States Government has rights in this invention pursuant to Contract No. W-31-109-ENG-38 between the U.S. Department of Energy and the University of Chicago, representing Argonne National Laboratory.
US Referenced Citations (3)