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US 10,096,839 B2Granted
Preparation of advanced CCMs for AMFCs by amination and cross-linking of the precursor form of the ionomer
AssigneePocell Tech Ltd.
InventorsDario Dekel, Shimshon Gottesfeld
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Abstract
In an AMFC, in the formation of a CCM, the anode catalyst layer is selectively cross-linked while the cathode catalyst layer is not cross-linked. This has been found to provide structural stabilization of the CCM without loss of initial power value for a CCM without cross-linking.
Claims7
An alkaline membrane fuel cell comprising:
- an anode electrode;
- a membrane electrolyte configured to conduct hydroxyl (OH—) anion constructed from a poly-hydrocarbon or poly-perfluorocarbon backbone and OH— anion carrying units, the membrane having an interface in physical contact with the anode electrode on a first surface of the membrane;
- a cathode electrode in physical contact with a second opposite surface of the membrane;
- the anode electrode and the cathode electrode each having a catalyst layer;
- wherein an ionomer component of the catalyst layer on the anode electrode is cross-linked to achieve structural stabilization without loss of cell power and wherein the cathode electrode is retained in a non-cross-linked form, and
- wherein preparation of the cross-linked ionomer component of the catalyst layer is completed by amination and cross-linking using a cross-linking agent, the cross-linking agent is a diamine, or mixture of diamines.
3 more elements
An alkaline membrane fuel cell comprising;
- an anode electrode;
- a membrane electrolyte configured to conduct hydroxyl (OH—) anion constructed from a poly-hydrocarbon or poly-perfluorocarbon backbone and OH— anion carrying units, the membrane having an interface in physical contact with the anode electrode on a first surface, of the membrane;
- a cathode electrode in physical contact with a second opposite surface of the membrane;
- the anode electrode and the cathode electrode each having a catalyst layer;
- wherein an ionomer component of the catalyst layer on the anode electrode is cross-linked to achieve structural stabilization without loss of cell power;
- wherein the cathode electrode is retained in a non-crosslinked form;
- wherein the anode side of the fuel cell includes a polymer in both membrane and electrode in precursor form;
- wherein amination and cross-linking have been applied to the precursor form using a non-aqueous solvent toluene;
- and
- wherein the cross-linking is performed by using a cross-linking agent, the cross-linking agent is a diamine, or mixture of diamines, where the diamines serve in mixture with monoamine, or by themselves.
7 more elements
Dependencies are inferred from the claim text.