Ion conductor, power storage device, and method for manufacturing ion conductor
An ion conductor exhibiting high lithium ion conductivity in the form of a molded product without firing is provided. The ion conductor contains an ion conductive powder having lithium ion conductivity and an ionic liquid having lithium ion conductivity. The ionic liquid has an average thickness of 5 nm or more.
1. An ion conductor comprising an ion conductive powder having lithium ion conductivity,
characterized in that the ion conductor further comprises an ionic liquid having lithium ion conductivity, and
the ionic liquid has an average thickness of 5 nm to 210 nm.
2. An ion conductor according to claim 1 , which has a porosity of 30% to 5.5%.
3. An ion conductor according to claim 1 , wherein
the ion conductive powder has a garnet structure or a garnet-like structure containing at least Li, La, Zr, and O.
4. An ion conductor according to claim 1 , which has a lithium ion conductivity of 1.0×10 −5 S/cm to 2.0×10 −3 at 25° C.
5. A power storage device comprising a solid electrolyte layer, a cathode, and an anode, wherein at least one of the solid electrolyte layer, the cathode, and the anode comprises the ion conductor as recited in claim 1 .
6. An ion conductor sheet comprising the ion conductor according to claim 1 , further comprising a binder.
7. A method for producing the ion conductor sheet as recited in claim 6 , the method comprising:
mixing the ion conductive powder with the ionic liquid, to thereby prepare a powder compound; and
after the mixing step, forming the ion conductor sheet from a mixture of the powder compound and a binder.