NON-AQUEOUS SOLVENT AND NON-AQUEOUS ELECTROLYTE FOR AN ELECTRICITY STORAGE DEVICE, NON-AQUEOUS ELECTRICITY STORAGE DEVICE EMPLOYING THE SAME, SUCH AS LITHIUM SECONDARY BATTERY OR ELECTRIC DOUBLE-LAYER CAPACITOR

A nonaqueous solvent for an electricity storage device according to the present invention comprises fluorine-containing cyclic saturated hydrocarbon having a structure which is represented by general formula (1) below and in which one or two substituents R are introduced into a cyclohexane ring (in general formula (1), R is represented by C n X 2n+1 , n is an integer of 1 or greater, at least one of (2n+1) pieces of X's is F, and the other X's are F or H).