US9728771B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9728771-B2 |
| Application number | US-201313900820-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 23, 2013 |
| Priority date | May 23, 2013 |
| Publication date | Aug 8, 2017 |
| Grant date | Aug 8, 2017 |
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An apparatus comprises an anode formed of graphene oxide from an acidic pH; a cathode from a pH greater than the acidic pH of the anode; and charge collectors deposited on the anode and the cathode. The anode comprises graphene oxide, the graphene oxide comprising an ink and having a pH of about 1 to about 4.
Opening claim text (preview).
What is claimed is: 1. An apparatus, comprising: an anode formed of graphene oxide from an acidic pH; a cathode from a pH greater than the acidic pH of the anode; and charge collectors deposited on the anode and the cathode; wherein the anode comprises graphene oxide, the graphene oxide comprising an ink and having a pH of about 1 to about 4; wherein a difference between the acidic pH of the graphene oxide and a higher pH dissociates protons coupled to the graphene oxide to cause the protons to migrate from the graphene oxide of the anode to the cathode to regenerate the apparatus; wherein the cathode is formed of graphene oxide from inks and has a pH of about 13 to about 14. 2. The apparatus of claim 1 , wherein an electrolyte comprising a synthetic ionomer is positioned between and in contact with each of the anode and the cathode. 3. The apparatus of claim 2 , wherein the synthetic ionomer comprises sulfonated tetrafluoroethylene-based fluoropolymer-copolymer. 4. The apparatus of claim 1 , wherein the charge collectors comprise one or more of Au, Cr, Ag, Al, Cu, and indium tin oxide. 5. The apparatus of claim 1 , wherein the charge collector deposited on the anode comprises Au, the cathode comprises graphene oxide, the charge collector deposited on the cathode comprises Au, and an electrolyte has a relative humidity of about 15%.
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