Redox fuel cells
First Claim
1. A redox fuel cell comprising:
- an anode region comprising an anode and a cathode region comprising a cathode, said regions being separated by an ion selective polymer electrolyte membrane;
a fuel passage through which fuel is supplied to the anode region of the cell;
an oxidant inlet that supplies an oxidant to the cathode region of the cell;
an electrical circuit between the anode and the cathode; and
a catholyte solution comprising at least one non-volatile catholyte component flowing in fluid communication with the cathode, the catholyte solution comprising a redox mediator which is at least partially reduced at the cathode in operation of the cell, and at least partially regenerated by, optionally indirect, reaction with the oxidant after such reduction at the cathode, the catholyte solution further comprising a complexed multidentate macrocyclic N-donor ligand as at least one of said redox mediator and a redox catalyst catalysing the regeneration of the said mediator.
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Accused Products
Abstract
This invention provides a redox fuel cell comprising an anode and a cathode separated by an ion selective polymer electrolyte membrane; means for supplying a fuel to the anode region of the cell; means for supplying an oxidant to the cathode region of the cell; means for providing an electrical circuit between the anode and the cathode; a non-volatile catholyte solution flowing in fluid communication with the cathode, the catholyte solution comprising a redox mediator which is at least partially reduced at the cathode in operation of the cell, and at least partially regenerated by, optionally indirect, reaction with the oxidant after such reduction at the cathode, and a transition metal complex of a multidentate macrocyclic N-donor ligand as a redox catalyst catalysing the regeneration of the mediator.
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Citations
45 Claims
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1. A redox fuel cell comprising:
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an anode region comprising an anode and a cathode region comprising a cathode, said regions being separated by an ion selective polymer electrolyte membrane; a fuel passage through which fuel is supplied to the anode region of the cell; an oxidant inlet that supplies an oxidant to the cathode region of the cell; an electrical circuit between the anode and the cathode; and a catholyte solution comprising at least one non-volatile catholyte component flowing in fluid communication with the cathode, the catholyte solution comprising a redox mediator which is at least partially reduced at the cathode in operation of the cell, and at least partially regenerated by, optionally indirect, reaction with the oxidant after such reduction at the cathode, the catholyte solution further comprising a complexed multidentate macrocyclic N-donor ligand as at least one of said redox mediator and a redox catalyst catalysing the regeneration of the said mediator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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Specification