Energy storage devices including a solid multilayer electrolyte
View Patent ↗Energy storage devices that include a solid multilayer electrolyte are provided. In certain embodiments, the energy storage devices disclosed herein can exhibit behavior analogous to an electrochemical battery at lower voltages, but can transition to electrostatic capacitor behavior as voltages rise. The energy storage devices, methods, and systems disclosed herein can preferably be advantageous by providing a large total energy storage capacity.
1. A method of storing energy, the method comprising:
providing an energy storage device comprising:
an anode;
a cathode; and
a solid multilayer electrolyte disposed between the anode and the cathode and comprising a plurality of layers comprising anionic exchange polymer electrolyte layers and cationic exchange polymer electrolyte layers, wherein at least one anionic exchange polymer electrolyte layer comprises a polymer having a plurality of chemically bound positive ions and a plurality of electrostatically bound negative ions, and at least one cationic exchange polymer electrolyte layer comprises a polymer having a plurality of chemically bound negative ions and a plurality of electrostatically bound positive ions;
applying a field negatively polarized with respect to the cathode and positively polarized with respect to the anode under conditions sufficient to cause substantially all the electrostatically bound positive ions to migrate and be reduced and deposited on the cathode, and substantially all the electrostatically bound negative ions to migrate and be oxidized and deposited on the anode, wherein the residual chemically bound positive ions on the one or more anionic exchange polymer electrolyte layers and the residual chemically bound negative ions on the one or more cationic exchange polymer electrolyte layers form a solid multilayer dielectric comprising directly alternating polarized polymer layers; and
further applying a field negatively polarized with respect to the cathode and positively polarized with respect to the anode under conditions sufficient to electrostatically store charge on surfaces of the electrodes.
2. The method of claim 1 wherein the solid multilayer electrolyte comprises directly alternating anionic exchange polymer electrolyte layers and cationic exchange polymer electrolyte layers, wherein at least one of the anionic exchange polymer electrolyte layers is adjacent the cathode and at least one of the cationic exchange polymer electrolyte layers is adjacent the anode.
3. The method of claim 1 wherein the anode, the cathode, or both comprise a porous metal or carbon plate.
4. The method of claim 1 wherein the anode comprises an anionic exchange polymer electrolyte and a plurality of graphite nanoparticles.
5. The method device of claim 1 wherein the cathode comprises a cationic exchange polymer electrolyte and a plurality of graphite nanoparticles.
6. The method of claim 1 wherein at least one of the anionic exchange polymer electrolyte layers comprises a chloride anionic exchange polymer, and wherein at least one of the cationic exchange polymer electrolyte layers comprises a hydrogen ion cationic exchange polymer.
7. The method of claim 6 further comprising a vacuum source configured to remove gases formed at one or more of the electrodes.
8. The method of claim 1 further comprising a non-electrically conductive polydimethylsiloxane dielectric oil at least partially within the solid multilayer electrolyte.
9. The method of claim 1 wherein the device is configured to be initially charged to store energy in an electrochemical mode, and wherein the device is configured to be further charged to store energy in an electrostatic mode.
10. The method of claim 1 wherein conditions sufficient to form the solid multilayer dielectric comprising directly alternating polarized polymer layers comprise applying a field having a potential of at least 1 volt direct current.
11. The method of claim 1 wherein conditions sufficient to store charge on surfaces of the electrodes comprise applying a field having a potential of greater than 1 volt direct current.
12. The method of claim 1 wherein conditions sufficient to store charge on surfaces of the electrodes comprise applying a field having a potential of no greater than the breakdown voltage of the dielectric.
13. A method of storing energy, the method comprising:
providing an energy storage device comprising:
an anode;
a cathode; and
a solid multilayer electrolyte disposed between the anode and the cathode and comprising a plurality of layers comprising anionic exchange polymer electrolyte layers and cationic exchange polymer electrolyte layers, wherein at least one anionic exchange polymer electrolyte layer comprises a polymer having a plurality of chemically bound positive ions and a plurality of electrostatically bound negative ions, and at least one cationic exchange polymer electrolyte layer comprises a polymer having a plurality of chemically bound negative ions and a plurality of electrostatically bound positive ions, and wherein at least one of the anionic exchange polymer electrolyte layers comprises a chloride anionic exchange polymer, and wherein at least one of the cationic exchange polymer electrolyte layers comprises a hydrogen ion cationic exchange polymer;
applying a field negatively polarized with respect to the cathode and positively polarized with respect to the anode under conditions sufficient to cause substantially all the electrostatically bound positive ions to migrate and be reduced at the cathode and removed as gas, and substantially all the electrostatically bound negative ions to migrate and be oxidized at the anode and removed as gas, wherein the residual chemically bound positive ions on the one or more anionic exchange polymer electrolyte layers and the residual chemically bound negative ions on the one or more cationic exchange polymer electrolyte layers form a solid multilayer dielectric comprising directly alternating polarized polymer layers; and
further applying a field negatively polarized with respect to the cathode and positively polarized with respect to the anode under conditions sufficient to electrostatically store charge on surfaces of the electrodes.
14. The method of claim 13 wherein the gases formed from the reduction of the electrostatically bound positive ions and the oxidation of the electrostatically bound negative ions are removed under vacuum.