| abstract |
A solid electrolyte capable of ensuring grain boundary resistance even when sintered at a relatively low temperature, and a lithium ion battery using the solid electrolyte. A first electrolyte 31 that is a garnet-type or garnet-like type crystalline material and a second electrolyte 32 that is an ion-conductive amorphous material, and the first electrolyte is 13 or more in a third period. Lithium composite oxide containing one kind of first metal element selected from group elements, and the second electrolyte is Li, a group 5 element of the fifth period or more, or a group 15 element of the fifth period or more. A solid electrolyte containing at least two second metal elements selected from: A solid electrolyte that preferably further includes an amorphous third electrolyte 33 made of an oxide containing Li and B. Since the first electrolyte 31 that is crystalline and the second electrolyte 32 that is amorphous are joined, compared to the case where the first electrolytes that are crystalline are joined directly to each other, the crystal interface is closer. An effect of reducing the generated resistance can be obtained. [Selection] Figure 4 |