1. An electrolyte solution comprising:

wherein M¹⁰¹ is P or P═O; R¹⁰¹ is a C1-C11 alkyloxy group, a silyloxy group, a C1-C11 alkylsilyloxy group, a C1-C11 alkoxysilyloxy group, or a C6-C18 arylsilyloxy group; n101 is a number of R¹⁰¹ s binding to M¹⁰¹ and is an oxidation number of M¹⁰¹ minus 1 or an oxidation number of M¹⁰¹ minus 3; when n101 is 2 or greater, R¹⁰¹ s are the same as or different from each other; and R¹⁰² to R¹⁰⁴ are each individually a C1-C11 alkyl group, a C2-C11 alkenyl group, a C1-C11 alkyloxy group, or a C6-C11 aryl group,

wherein R¹¹¹ and R¹¹² are the same as or different from each other and are each a hydrogen atom, a fluorine atom, or an alkyl group optionally containing a fluorine atom; and R¹¹³ is an alkyl group free from a fluorine atom or an organic group containing an unsaturated carbon-carbon bond,

wherein R¹²¹ is an optionally fluorinated C1-C7 alkyl group, an optionally fluorinated C2-C8 alkenyl group, an optionally fluorinated C2-C9 alkynyl group, or an optionally fluorinated C6-C12 aryl group, and optionally contains at least one selected from the group consisting of O, Si, S, and N in a structure,

wherein R¹³¹ and R¹³² are (i) each individually H, F, an optionally fluorinated C1-C7 alkyl group, an optionally fluorinated C2-C7 alkenyl group, an optionally fluorinated C2-C9 alkynyl group, or an optionally fluorinated C5-C12 aryl group, or (ii) hydrocarbon groups binding to each other to form a 5-membered or 6-membered hetero ring with a nitrogen atom; and R¹³¹ and R¹³² each optionally contain at least one selected from the group consisting of O, S, and N in a structure, the formula (11-4) being:

wherein Rf¹⁴¹ is CF₃—, CF₂H—, or CFH₂—; and R¹⁴¹ is an optionally fluorinated C2-C5 alkenyl group or an optionally fluorinated C2-C8 alkynyl group and optionally contains Si in a structure.