Patent ID: 8451584

Claim:
A solid state energy storage device comprising: a first electrode; a second electrode; a separator membrane between the first electrode and the second electrode; a first electrolyte in contact with the first electrode and the separator membrane, the first electrolyte comprising dissociated salt ions, a mediator and a substantially solid solvent, the mediator of the first electrolyte being comprised of a reduced species of a molecule and an oxidized species of the molecule in a ratio of ten reduced molecules to one oxidized molecule; and a second electrolyte in contact with the second electrode and the separator membrane, the second electrolyte comprising dissociated salt ions, a mediator and a substantially solid solvent, the mediator of the second electrolyte being comprised of a reduced species of a molecule and an oxidized species of the molecule in a ratio of one reduced molecule to ten oxidized molecules; wherein the separator membrane is non-conductive, permeable to the dissociated salt ions and impermeable to the mediator.