| CPC H01M 10/0562 (2013.01) [H01M 10/0525 (2013.01); H01M 2300/008 (2013.01)] | 9 Claims |

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1. A solid electrolyte material comprising:
Li, Ca, Y, Gd, and X, wherein
X is at least one element selected from the group consisting of F, Cl, Br, and I.
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