| abstract |
The present invention relates to a method for producing a solid electrolyte having a arginite type crystal structure, comprising a mixing step of mixing raw materials such that lithium (Li), phosphorus (P), sulfur (S), oxygen (O) and The halogen (X) satisfies the following formulae (11) to (14); the heating step is to heat the mixture obtained by the mixing step. 4.8≤Li/P≤5.3...(11)3.8≤S/P≤4.4...(12)0<O/P≤0.8...(13)1.0<X/P≤2.0...(14) (formula (11) is The molar ratio of Li to P, formula (12) is the molar ratio of S to P, formula (13) is the molar ratio of O to P, and formula (14) is the molar ratio of halogen (X) to P) . |