Phosphorus electrolytic solution containing magnesium ions

An electrolytic solution for a magnesium battery, formed by mixing a compound represented by the following general formula (I), a Lewis acid or a compound represented by the following general formula (A), and a solvent:

• in the formula, m represents 0 or 2, n represents 2 in a case of m=0 and represents 0 or 1 in a case of m=2, X1 represents a chlorine atom or a bromine atom, two R1' s each independently represent a magnesium chloride oxy group (—OMgCl);
• a magnesium bromide oxy group (—OMgBr);
• an alkyl group having 1 to 6 carbon atoms, which may have a halogeno group or an alkoxy group as a substituent;
• an alkoxy group having 1 to 6 carbon atoms;
• an aryl group having 6 to 10 carbon atoms, which may have a halogeno group, an alkyl group, a halogenoalkyl group, or an alkoxy group as a substituent;
• an aryloxy group having 6 to 10 carbon atoms, which may have a halogeno group, an alkyl group, a halogenoalkyl group, or an alkoxy group as a substituent;
• or a group represented by the following general formula (1), and two R1's may form the following general formula (2):
• in the formula, a represents an integer of 1 to 3, X2 represents a chlorine atom or a bromine atom, and a pieces of R2's each independently represent a magnesium chloride oxy group (—OMgCl);
• a magnesium bromide oxy group (—OMgBr);
• an alkyl group having 1 to 6 carbon atoms, which may have a halogeno group or an alkoxy group as a substituent;
• an alkoxy group having 1 to 6 carbon atoms;
• an aryl group having 6 to 10 carbon atoms, which may have a halogeno group, an alkyl group, a halogenoalkyl group, or an alkoxy group as a substituent;
• or an aryloxy group having 6 to 10 carbon atoms, which may have a halogeno group, an alkyl group, a halogenoalkyl group, or an alkoxy group as a substituent;
• and
• in the formula, b represents an integer of 1 to 3, and R2 is the same as described above;
• and
• Mg[N(SO2R10)2]2 (A)
• in the formula, four R10's each independently represent an alkyl group having 1 to 6 carbon atoms, a perfluoroalkyl group having 1 to 6 carbon atoms, a phenyl group, or a perfluorophenyl group.