Integrable redox-active polymer batteries
View Patent ↗The disclosed technology relates generally to apparatuses and methods of fabricating solid-state electrochemical cells having redox-active polymers. In one aspect, an electrochemical cell comprises a negative electrode including a first redox-active polymer and configured to be reversibly oxidized during a discharging operation and further configured to be reversibly reduced during a charging operation. The electrochemical cell additionally comprises a positive electrode including a second redox-active polymer and configured to be reversibly reduced during the discharging operation and further configured to be reversibly oxidized during the charging operation. The electrochemical cell further comprises an electrolyte including a solid ion-exchange polymer, the electrolyte interposed between positive and negative electrodes and configured to conduct ions therebetween. The electrochemical cell is configured to store energy for an associated device or apparatus and further configured to provide structural features of the associated device or apparatus. The electrochemical cell may constitute a part of the casing, packaging or containment of the device.
1. An electrochemical cell comprising:
a negative electrode comprising a first redox-active polymer and configured to be reversibly oxidized during a discharging operation and further configured to be reversibly reduced during a charging operation;
a positive electrode comprising a second redox-active polymer and configured to be reversibly reduced during the discharging operation and further configured to be reversibly oxidized during the charging operation, wherein the second redox-active polymer includes one or both of poly(1-naphthol) and poly(10-hexylphenothiazine-3,7-diyl); and
an electrolyte comprising a solid ion-exchange polymer, the electrolyte interposed between the positive and negative electrodes and configured to conduct ions therebetween.
2. The electrochemical cell of claim 1 , wherein the electrochemical cell comprises at least a portion of a packaging, casing or containment of the associated device or apparatus.
3. The electrochemical cell of claim 1 , wherein the electrochemical cell is formed by injection molding manufacturing processes.
4. The electrochemical cell of claim 1 , wherein the electrochemical cell is formed by additive manufacturing processes.
5. The electrochemical cell of claim 1 , wherein the electrochemical cell is formed collectively with the associated device or apparatus.
6. The electrochemical cell of claim 1 , wherein the electrochemical cell is formed collectively with the associated device or apparatus by injection molding manufacturing processes.
7. The electrochemical cell of claim 1 , wherein the electrochemical cell is formed collectively with the associated device or apparatus by additive manufacturing processes.
8. The electrochemical cell of claim 1 , wherein at least one of the positive and negative electrodes comprises a copolymer.
9. The electrochemical cell of claim 1 , wherein at least one of the positive and negative electrodes comprises a polymer blend.
10. The electrochemical cell of claim 1 , wherein at least one of the positive and negative electrodes comprises at least one of a copolymer or polymer blend, configured to provide mechanical stability during fabrication.
11. The electrochemical cell of claim 1 , wherein at least one of the positive and negative electrodes comprises at least one of a copolymer or polymer blend, configured to provide stability during long-term charge-discharge cycling.
12. The electrochemical cell of claim 1 , wherein at least one of the positive and negative electrodes comprises at least one selected from the group consisting of a copolymer, polymer blend and plasticizing agent, configured to facilitate an injection molding manufacturing process.
13. The electrochemical cell of claim 1 , wherein at least one of the positive and negative electrodes comprises a copolymer or polymer blend, configured to increase electrical conductivity.
14. The electrochemical cell of claim 1 , wherein at least one of the positive and negative electrodes comprises a copolymer or polymer blend, configured to improve adhesion to a substrate or surface.
15. The electrochemical cell of claim 1 , wherein at least one of the positive and negative electrodes comprises a dopant.
16. The electrochemical cell of claim 1 , wherein at least one of the first and second redox-active polymers includes a quinoid structure.
17. The electrochemical cell of claim 1 , wherein the first redox-active polymer is selected from the group consisting of polyaniline, poly(aminoanthraquinone), polyvinylanthraquinone, poly(l-aminoanthraquinone), poly(3,7-dialkylbenzo[1,2-b:4,5-b′]dithiophene-4,8-dione-2,6-diyl), and combinations thereof.
18. The electrochemical cell of claim 1 , wherein at least one of the positive and negative electrodes comprises a protective compound adapted to protect at least one of the first and second redox-active polymers from over-charging or over-discharging, the protective compound selected from the group consisting of a phenothiazine, iodine, tri-iodine, benzoquinone, naphthoquinone, and anthraquinone, their derivatives and combinations thereof.
19. The electrochemical cell of claim 1 , wherein at least one of the first and second redox-active polymers comprises an electrically conductive polymer backbone with a functional side group having redox activity, wherein the functional side group is selected from the group consisting of alkanes, alkenes, benzenes, styrenes, alcohols, ketones, esters, ethers, amines, amides, imines, imides, alkylamines, pyridines, thiols, thiophenes, thiones, thials, phenothiazines, sulfides, sulfoxides, phosphines, phosphones, halides, quinones, their derivatives and combinations thereof.
20. The electrochemical cell of claim 1 , wherein at least one of the first and second redox-active polymers comprises an electrically conductive polymer backbone with a functional side group having redox activity, wherein the backbone is selected from the group consisting of polypyrrole, polyaniline, polydiphenylamine, poly(o-phenyldiamine), polythiophenes, poly(3,4-ethylenedioxythiophene), polyphenazines, polycarbazoles, polyfluorenes, polyindoles, polyphenylenes, polypyrenes, polyazulenes, polynaphthalenes, polyazepines, poly(p-phenylene sulfide), derivatives and combinations thereof.