Nonaqueous electrolyte solution, nonaqueous sodium-ion battery, nonaqueous potassium-ion battery, method for producing nonaqueous sodium-ion battery, and method for producing nonaqueous potassium-ion battery

The present invention provides: a non-aqueous electrolyte solution for a sodium ion battery or a potassium ion battery; a non-aqueous sodium ion battery and a non-aqueous potassium ion battery using the non-aqueous electrolyte solution; a method for producing a non-aqueous sodium ion battery; and a method for producing a non-aqueous potassium ion battery. The present invention relates to a non-aqueous solvent composition containing (I) a non-aqueous organic solvent, (II) a solute as an ionic salt, and (III) at least one selected from the group consisting of organochlorine compounds, phosphorus compounds having a P-Cl bond, sulfone compounds having an S (= O) 2-Cl bond, sulfoxide compounds having an S (= O)-Cl bond, and silicon compounds having an Si-Cl bond. 本发明提供一种非水电解液、使用了该非水电解液的非水钠离子电池及非水钾离子电池、以及非水钠离子电池的制造方法及非水钾离子电池的制造方法，所述非水电解液为用于钠离子电池或用于钾离子电池的非水电解液，其包含(I)非水有机溶剂、(II)作为离子盐的溶质、(III)选自由有机氯化合物、具有P-Cl键的磷化合物、具有S(＝O)2-Cl键的砜化合物、具有S(＝O)-Cl键的亚砜化合物及具有Si-Cl键的硅化合物组成的组中的至少一种。