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US 8,617,770 B2Granted
Electrodes containing oxygen evolution reaction catalysts
AssigneeGM Global Technology Operations LLC
InventorsSusan G. Yan, Hubert A. Gasteiger, Paul Taichiang Yu, Wenbin Gu, Jingxin Zhang
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Abstract
One embodiment of the invention includes a method including providing a cathode catalyst ink comprising a first catalyst, an oxygen evolution reaction catalyst, and a solvent; and depositing the cathode catalyst ink on one of a polymer electrolyte membrane, a gas diffusion medium layer, or a decal backing.
Claims16
A method comprising:
- providing a polymer electrolyte membrane comprising a first face and a second face;
- providing a cathode electrode over the first face of the polymer electrolyte membrane, wherein the cathode electrode comprises an oxygen reduction reaction first catalyst supported on graphitized carbon and an Iridium oxide oxygen evolution reaction catalyst having the formula IrOx supported on graphitized carbon, where x has a numeric value between 0 (not including 0) and 2, and wherein the oxygen evolution catalyst is present in an amount ranging from about 0.1 wt % to 2 wt % of the oxygen reduction reaction first catalyst, and wherein the oxygen reduction reaction first catalyst and the oxygen evolution reaction catalyst of the cathode electrode are in the form of finely divided particles and the cathode electrode further comprises a proton conducting ionomer intermingled with at least the oxygen reduction reaction first catalyst particles, and wherein the ratio of the ionomer to graphitized carbon is between 0.6 and 2.0;
- providing a first microporous layer over the cathode electrode;
- providing first gas diffusion media layer over the first microporous layer;
- providing an anode electrode over the second face of the polymer electrolyte;
- providing a second microporous layer over the anode electrode;
- and
- providing a second gas diffusion media layer over the second microporous layer.
5 more elements
A method comprising:
- providing a polymer electrolyte membrane comprising a first face and a second face;
- providing an Iridium oxide oxygen evolution reaction catalyst having the formula IrOx supported on graphitized carbon over the first face of the polymer electrolyte membrane;
- wherein x has a numeric value between 0 (not including 0) and 2, and
- providing a cathode electrode comprising a first catalyst supported on graphitized carbon over the oxygen evolution reaction catalyst, wherein the oxygen evolution reaction catalyst is present in an amount ranging from about 0.1 wt % to 2 wt % of the first catalyst, wherein the first catalyst and the oxygen evolution reaction catalyst of the cathode electrode are in the form of finely divided particles and the cathode electrode further comprises a proton conducting ionomer intermingled with at least the first catalyst particles, and wherein the ratio of the ionomer to graphitized carbon is between 0.6 and 2.0.
1 more element
A method comprising:
- providing a polymer electrolyte membrane comprising a first face and a second face;
- providing an Iridium oxide oxygen evolution reaction catalyst having the formula IrOx supported on graphitized carbon over the first face of the polymer electrolyte membrane;
- wherein x has a numeric value between 0 (not including 0) and 2, and providing a cathode electrode comprising a first catalyst over the oxygen evolution reaction catalyst, wherein the oxygen evolution reaction catalyst is present in an amount ranging from about 0.1 wt % to 2 wt % of the first catalyst, wherein the first catalyst and the oxygen evolution reaction catalyst of the cathode electrode are in the form of finely divided particles and the cathode electrode further comprises a proton conducting ionomer intermingled with at least the first catalyst particles, and wherein the ratio of the ionomer to graphitized carbon is between 0.6 and 2.0, and wherein the cathode electrode further comprises an electrically conductive material for supporting the first catalyst in the form of particles having solid or hollow cores.
A method comprising:
- providing a polymer electrolyte membrane comprising a first face and a second face;
- providing a cathode electrode over the first face of the polymer electrolyte membrane, wherein the cathode electrode comprises an oxygen reduction reaction first catalyst and an Iridium oxide oxygen evolution reaction catalyst having the formula IrOx supported on graphitized carbon, where x has a numeric value between 0 (not including 0) and 2, and wherein the oxygen evolution catalyst is present in an amount ranging from about 0.1 wt % to 2 wt % of the oxygen reduction reaction first catalyst, and wherein the oxygen reduction reaction first catalyst and the oxygen evolution reaction catalyst of the cathode electrode are in the form of finely divided particles and the cathode electrode further comprises a proton conducting ionorner intermingled with at least the oxygen reduction reaction first catalyst particles, and wherein the ratio of the ionomer to graphitized carbon is between 0.6 and 2.0, and wherein the cathode electrode further comprises an electrically conductive material for supporting the oxygen reduction reaction first catalyst in the form of particles having solid or hollow cores;
- providing a first microporous layer over the cathode electrode;
- providing a first gas diffusion media layer over the first microporous layer;
- providing an anode electrode over the second face of the polymer electrolyte;
- providing a second microporous layer over the anode electrode;
- and
- providing a second gas diffusion media layer over the second microporous layer.
5 more elements
Dependencies are inferred from the claim text.