Failsafe Liquefied Gas Electrolytes with Solidifying Agents

An ionically conducting electrolyte is disclosed that includes a mixture of a liquefied gas solvent, a solidifying agent, and a salt. The liquefied gas solvent has a vapor pressure above 100 kPa at 293.15K. The solidifying agent may be a solid, liquid, or a gas at 100 kPa and 293.15K. The salt is soluble in the ionically conducting electrolyte at 100 kPa and 293.15K, thereby maintaining the ionically conducting electrolyte in a liquid phase. The salt and solidifying agent create a solid material at 100 kPa and 293.15K when the liquified gas solvent is removed from the mixture. Also disclosed are electrochemical devices including two electrodes in contact with this electrolyte. The device has a housing enclosing the electrolyte and electrode.