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Electrolyte separator and method of making the electrolyte separator

  • US 9,368,774 B2
  • Filed: 03/24/2010
  • Issued: 06/14/2016
  • Est. Priority Date: 03/24/2010
  • Status: Active Grant
First Claim
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1. An electrolyte separator structure comprising:

  • a graded integral structure, wherein the graded integral structure comprises a monolithic structure comprising an ion-conducting first ceramic at a first end and an electrically insulating second ceramic at a second end;

    wherein the electrically insulating second ceramic comprises one or more of alpha-alumina, yttria, yttria stabilized zirconia, yttrium aluminum garnet, magnesia alumina spinel, and yttrium aluminate perovskite;

    wherein the difference in the coefficient of thermal expansion of the ion-conducting first ceramic and the electrically insulating second ceramic is less than or equal to about 5 parts per million per degrees Centigrade; and

    wherein at least one of the first ceramic or the second ceramic comprises a strengthening agent that comprises an oxide, a nitride, or a carbide of at least one element selected from the group consisting of group IIIA elements, group IIIB elements, group IVB elements, and group IVB elements.

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