| 摘要 |
To provide a lithium-ion conductor that exhibits excellent ion conductive property, and an all-solid lithium-ion secondary battery using the same. The lithium-ion conductor contains a crystal structure whose composition formula is represented by Li 7+2x P 1-x B x S 6 (0 < x ‰¤ 1). The crystal structure contains a LiS 4 tetrahedron (11) and a BS 4 tetrahedron (12b), a triangle window (30) of the LiS 4 tetrahedron (11) through which lithium ions pass becomes large caused by the BS 4 tetrahedron (12b), and an ionic conductive path is expanded. Furthermore, lithium ions being a conductive carrier are added corresponding to B quantity x. Consequently, a lithium-ion conductor that exhibits excellent ion conductive property is realized. By using the lithium-ion conductor for a solid electrolyte, an all-solid lithium-ion secondary battery with high characteristics is realized. |
