ALL-SOLID-STATE LITHIUM-ION SECONDARY BATTERY AND PRODUCTION METHOD THEREOF

1 . An all-solid-state lithium-ion secondary battery comprising:

an anode;

a cathode;

a solid electrolyte layer disposed between the anode and the cathode; and

at least one of a first mixed region formed at an interface between the anode and the solid electrolyte layer and containing a constituent material of the anode and a constituent material of the solid electrolyte layer, and a second mixed region formed at an interface between the cathode and the solid electrolyte layer and containing a constituent material of the cathode and a constituent material of the solid electrolyte layer.

2 . The all-solid-state lithium-ion secondary battery according to claim 1 , wherein the first mixed region and the second mixed region contain at least a constituent material containing an anion, among constituent materials of the solid electrolyte layer.

3 . An all-solid-state lithium-ion secondary battery comprising:

an anode;

a cathode; and

a solid electrolyte layer disposed between the anode and the cathode;

wherein the solid electrolyte layer and at least one of the anode and the cathode are obtained by applying a sol solid electrolyte layer precursor for formation of the solid electrolyte layer, and at least one of a sol anode precursor for formation of the anode and a sol cathode precursor for formation of the cathode, in multiple layers in an undried state and thereafter firing the precursors.

4 . The all-solid-state lithium-ion secondary battery according to claim 1 , wherein the anode contains at least one of at least one metal selected from the group consisting of Sn, Si, Al, Ge, Sb, Ag, Ga, In, Fe, Co, Ni, Ti, Mn, Ca, Ba, La, Zr, Ce, Cu, Mg, Sr, Cr, Mo, Nb, V, and Zn, an alloy of two or more metals selected from the group, an oxide of said metal, and an oxide of said alloy.

5 . The all-solid-state lithium-ion secondary battery according to claim 3 , wherein the anode contains at least one of at least one metal selected from the group consisting of Sn, Si, Al, Ge, Sb, Ag, Ga, In, Fe, Co, Ni, Ti, Mn, Ca, Ba, La, Zr, Ce, Cu, Mg, Sr Cr, Mo, Nb, V, and Zn, an alloy of two or more metals selected from the group, an oxide of said metal, and an oxide of said alloy.

6 . The all-solid-state lithium-ion secondary battery according to claim 4 , wherein the anode contains a composite material in which at least one of said metal, said alloy, the oxide of said metal, and the oxide of said alloy is supported in a pore of a porous carbon material.

7 . The all-solid-state lithium-ion secondary battery according to claim 5 , wherein the anode contains a composite material in which at least one of said metal, said alloy, the oxide of said metal, and the oxide of said alloy is supported in a pore of a porous carbon material.

8 . The all-solid-state lithium-ion secondary battery according to claim 1 , wherein the cathode contains an oxide of at least one transition metal selected from the group consisting of Co, Ni, Mn, and Fe.

9 . The all-solid-state lithium-ion secondary battery according to claim 3 , wherein the cathode contains an oxide of at least one transition metal selected from the group consisting of Co, Ni, Mn, and Fe.

10 . The all-solid-state lithium-ion secondary battery according to claim 1 , wherein the solid electrolyte layer contains at least one of an oxide, sulfide, or phosphate compound of at least one element selected from the group consisting of Ti, Al, La, Ge, Si, Ce, Ga, In, P, and S.

11 . The all-solid-state lithium-ion secondary battery according to claim 3 , wherein the solid electrolyte layer contains at least one of an oxide, sulfide, or phosphate compound of at least one element selected from the group consisting of Ti, Al, La, Ge, Si, Ce, Ga, In, P, and S.

12 . The all-solid-state lithium-ion secondary battery according to claim 1 , comprising a current collector on at least one of a surface of the anode on the opposite side to the solid electrolyte layer and a surface of the cathode on the opposite side to the solid electrolyte layer.

13 . The all-solid-state lithium-ion secondary battery according to claim 3 , comprising a current collector on at least one of a surface of the anode on the opposite side to the solid electrolyte layer and a surface of the cathode on the opposite side to the solid electrolyte layer.

14 . The all-solid-state lithium-ion secondary battery according to claim 1 , comprising a plurality of single cells each of which includes the anode, the cathode, and the solid electrolyte layer.

15 . The all-solid-state lithium-ion secondary battery according to claim 3 , comprising a plurality of single cells each of which includes the anode, the cathode, and the solid electrolyte layer.

16 . A method for producing an all-solid-state lithium-ion secondary battery comprising:

an anode;

a cathode; and

a solid electrolyte layer disposed between the anode and the cathode;

the method comprising: a step of applying a sol solid electrolyte layer precursor for formation of the solid electrolyte layer, and at least one of a sol anode precursor for formation of the anode and a sol cathode precursor for formation of the cathode, in multiple layers in an undried state, and thereafter firing the precursors.

17 . The method according to claim 16 , wherein the sol anode precursor contains an ion of at least one metal selected from the group consisting of Sn, Si, Al, Ge, Sb, Ag, Ga, In, Fe, Co, Ni, Ti, Mn, Ca, Ba, La, Zr, Ce, Cu, Mg, Sr, Cr, Mo, Nb, V, and Zn; a hydroxy acid; and a glycol.

18 . The method according to claim 16 , wherein the sol cathode precursor contains an ion of at least one transition metal selected from the group consisting of Co, Ni, Mn, and Fe.

19 . The method according to claim 16 , wherein the sol solid electrolyte layer precursor contains at least one element selected from the group consisting of Ti, Al, La, Ge, Si, Ce, Ga, In, P, and S.

20 . The method according to claim 16 , wherein the firing is carried out at a temperature of 500° C. or more in the presence of oxygen.