| abstract |
PROBLEM TO BE SOLVED: To provide a solid electrolyte capable of reducing grain boundary resistance, a method for producing the solid electrolyte, a secondary battery, and an electronic device equipped with the secondary battery. A lithium battery 100 as a secondary battery includes a solid electrolyte 12, a positive electrode active material 11p containing lithium, and a positive electrode active material 11p as an electrode provided on one surface of the positive electrode active material 11. The solid electrolyte 12 includes a negative electrode 30 and a current collector 41 provided on the other surface of the positive electrode mixture material 10. The solid electrolyte 12 is of a garnet type that conducts lithium represented by the following composition formula (1) or (2). It is a lithium mixed metal oxide containing fluorine. (Li 7-3x Ga x) (La 3-y Nd y) Zr 2 O 12-z F z ··· (1) (Li 7-3x+y Ga x )(La 3-y Ca y )Zr 2 O 12-z F z (2) However, 0.1≦x≦1.0, 0<y≦0.2, and 0<z≦1.0 are satisfied. [Selection diagram] Figure 2 |