A method of depositing an anion exchange polymer on an electrode substrate, said method comprising: a) contacting an electrode substrate with an anion exchange polymer in ionic form, wherein the polymer comprises a quaternary ammonium group as the anion exchange group, and b) treating the polymer, so as to render it insoluble on the substrate.
The present invention relates to a method of depositing an anion exchange polymer on an electrode substrate. The present invention also relates to an electrode for use in an electrical device, for example an electrochemical device, such as a fuel cell.
A fuel cell is an electrochemical device that produces electricity from a fuel and an oxidant. Various types of fuel cells are known. For example, in an alkaline anion exchange membrane (AAEM) fuel cell, an AAEM is located between the anode and cathode of the cell. A fuel, such as hydrogen, is supplied to the anode of the fuel cell, while an oxidant, such as oxygen, is supplied to the cathode. At the anode, the hydrogen is oxidised according to the half reaction:
H2 + 20H<~> -> 2H2O + 2e<~>
At the cathode, oxygen is reduced according to the half reaction:
1/2O2 + H2O + 2e<~> -> 2OH<">
VARCOE JOHN [GB]; POYNTON SIMON [GB]; SLADE ROBERT [GB]; HANDSEL JENNIFER [GB]
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