An electrolyte comprising: a non-aqueous solvent; a lithium salt (A); and at least one compound (B) selected from the group consisting of the following compounds: a compound represented by the following formula , wherein X represents a Li atom or a hydrogen atom; and R 1 and R 2 each independently represent a group selected from the group consisting of an OH group, an OLi group, an alkyl group having 1 to 10 carbon atoms, which may have a substituent, an alkoxy group having 1 to 10 carbon atoms, which may have a substituent, an aryl group having 6 to 10 carbon atoms, which may have a substituent, an aryloxy group having 6 to 10 carbon atoms, which may have a substituent, and an siloxy group having 3 to 10 carbon atoms, a compound represented by the following formula wherein X represents a Li atom or a hydrogen atom; and R 3 represents a group represented by formula or a group represented by formula , wherein Y represents a Li atom or a hydrogen atom; and R4 represents a hydrocarbon group having 1 to 19 carbon atoms, which may have a substituent; wherein R 5 represents a hydrocarbon group having 1 to 13 carbon atoms, which may have a substituent; and R 6 a hydrocarbon group having 1 to 6 carbon atoms, which may have a substituent or a trialkylsilyl group having 3 t 6 carbon atoms, which may have a substituent, and a compound represented by the following: a non-aqueous solvent; a lithium salt (A); and at least one compound (B) selected from the group consisting of the following compounds: a compound represented by the following formula , wherein X represents a Li atom or a hydrogen atom; and R 1 and R 2 each independently represent a group selected from the group consisting of an OH group, an OLi group, an alkyl group having 1 to 10 carbon atoms, which may have a substituent, an alkoxy group having 1 to 10 carbon atoms, which may have a substituent, an aryl group having 6 to 10 carbon atoms, which may have a substituent, an aryloxy group having 6 to 10 carbon atoms, which may have a substituent, and an siloxy group having 3 to 10 carbon atoms, a compound represented by the following formula wherein X represents a Li atom or a hydrogen atom; and R 3 represents a group represented by formula or a group represented by formula , wherein Y represents a Li atom or a hydrogen atom; and R4 represents a hydrocarbon group having 1 to 19 carbon atoms, which may have a substituent; wherein R 5 represents a hydrocarbon group having 1 to 13 carbon atoms, which may have a substituent; and R 6 a hydrocarbon group having 1 to 6 carbon atoms, which may have a substituent or a trialkylsilyl group having 3 t 6 carbon atoms, which may have a substituent, and a compound represented by the following: a compound represented by the following formula , wherein X represents a Li atom or a hydrogen atom; and R 1 and R 2 each independently represent a group selected from the group consisting of an OH group, an OLi group, an alkyl group having 1 to 10 carbon atoms, which may have a substituent, an alkoxy group having 1 to 10 carbon atoms, which may have a substituent, an aryl group having 6 to 10 carbon atoms, which may have a substituent, an aryloxy group having 6 to 10 carbon atoms, which may have a substituent, and an siloxy group having 3 to 10 carbon atoms, a compound represented by the following formula wherein X represents a Li atom or a hydrogen atom; and R 3 represents a group represented by formula or a group represented by formula , wherein Y represents a Li atom or a hydrogen atom; and R4 represents a hydrocarbon group having 1 to 19 carbon atoms, which may have a substituent; wherein R 5 represents a hydrocarbon group having 1 to 13 carbon atoms, which may have a substituent; and R 6 a hydrocarbon group having 1 to 6 carbon atoms, which may have a substituent or a trialkylsilyl group having 3 t 6 carbon atoms, which may have a substituent, and a compound represented by the following: <EOS>