Lithium-ion conducting oxide, solid electrolyte secondary battery and battery pack
According to one embodiment, a solid electrolyte secondary battery includes a positive electrode, a negative electrode and a solid electrolyte layer. The solid electrolyte layer includes a lithium-ion conducting oxide containing at least one element selected from the group consisting of B, N, F and S, wherein a total content of the element in the lithium-ion conducting oxide is 0.05% by mass or more and 1% by mass or less.
1. A solid electrolyte secondary battery comprising a positive electrode, a negative electrode and a solid electrolyte layer,
wherein the solid electrolyte layer comprises a lithium-ion conducting oxide which has a perovskite structure and expressed by Li 3x La 2/3-x TiO 3 , where x is 0<x<2/3, or which has a garnet structure and expressed by Li 5+x La 3 M 2-x Zr x O 12 , where M is at least one of Nb and Ta, and x is 0≦x≦2, or which is LISICON, LIPON, or NASICON, and
the lithium-ion conducting oxide includes at least one element selected from the group consisting of B, N, F and S, a total content of the element in the lithium-ion conducting oxide being 0.05% by mass or more and 1% by mass or less.
2. The solid electrolyte secondary battery of claim 1 , wherein the negative electrode comprises an active material, the active material being a titanium composite oxide, a silicon composite oxide, or an iron oxide.
3. A solid electrolyte secondary battery comprising a positive electrode, a negative electrode and a solid electrolyte layer,
wherein the solid electrolyte layer comprises a lithium-ion conducting oxide which has a perovskite structure and expressed by Li 3x La 2/3-x TiO 3 , where x is 0<x<2/3, or which has a garnet structure and expressed by Li 5+x La 3 M 2-x Zr x O 12 , where M is at least one of Nb and Ta, and x is 0≦x≦2, or which is LISICON, LIPON, or NASICON,
the lithium-ion conducting oxide includes at least one element selected from H and C, a total content of the element in the lithium-ion conducting oxide being 0.05% by mass or more and 0.2% by mass or less.
4. The solid electrolyte secondary battery of claim 3 , wherein the negative electrode comprises an active material, the active material being a titanium composite oxide, a silicon composite oxide, or an iron oxide.
5. A battery pack comprising the solid electrolyte secondary battery according to claim 1 .
6. A battery pack comprising the solid electrolyte secondary battery according to claim 3 .
7. The solid electrolyte secondary battery of claim 1 , wherein lithium-ion conducting oxide has a perovskite structure and expressed by Li 3x La 2/3-x TiO 3 , where x is 0<x<2/3.
8. The solid electrolyte secondary battery of claim 1 , wherein lithium-ion conducting oxide has a garnet structure and expressed by Li 5+x La 3 M 2-x Zr x O 12 , where M is at least one of Nb and Ta, and x is 0≦x≦2.
9. The solid electrolyte secondary battery of claim 1 , wherein a total content of the element in the lithium-ion conducting oxide is 0.05% by mass or more and 0.6% by mass or less.
10. The solid electrolyte secondary battery of claim 1 , wherein the positive electrode comprises an active material, the active material being a lithium manganese composite oxide, a lithium manganese nickel composite oxide having a spinel structure, a lithium nickel composite oxide, a lithium cobalt composite oxide, a lithium nickel cobalt composite oxide, a lithium manganese cobalt composite oxide, a lithium nickel cobalt manganese composite oxide, or a lithium iron phosphate.
11. The solid electrolyte secondary battery of claim 3 , wherein lithium-ion conducting oxide has a perovskite structure and expressed by Li 3x La 2/3-x TiO 3 , where x is 0<x<2/3.
12. The solid electrolyte secondary battery of claim 3 , wherein lithium-ion conducting oxide has a garnet structure and expressed by Li 5+x La 3 M 2-x Zr x O 12 , where M is at least one of Nb and Ta, and x is 0≦x≦2.
13. The solid electrolyte secondary battery of claim 3 , wherein a total content of the element in the lithium-ion conducting oxide is 0.05% by mass or more and 0.1% by mass or less.
14. The solid electrolyte secondary battery of claim 3 , wherein the positive electrode comprises an active material, the active material being a lithium manganese composite oxide, a lithium manganese nickel composite oxide having a spinel structure, a lithium nickel composite oxide, a lithium cobalt composite oxide, a lithium nickel cobalt composite oxide, a lithium manganese cobalt composite oxide, a lithium nickel cobalt manganese composite oxide, or a lithium iron phosphate.