Electrochemical cell magnetic electrocatalyst
AssigneeRobert Bosch GmbH
InventorsDaniil A Kitchaev, Nathan Craig, Matthias Hanauer, Ulrich Berner, Charles Tuffile
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Abstract
An electrochemical cell includes a membrane, a catalyzed electrode facing the membrane, the electrode including a magnetic electrocatalyst in contact with an ionomer, an electromagnet, and a controller programmed to activate the electromagnet to form an oscillating magnetic field arranged to selectively increase temperature of the magnetic electrocatalyst, based on one or more conditions, to increase kinetics of a reaction at the catalyzed electrode or remove water from the electrode.
Claims20
An electrochemical cell comprising:
- a membrane;
- a catalyzed electrode facing the membrane, the electrode including a magnetic electrocatalyst in contact with an ionomer;
- an electromagnet;
- and
- a controller programmed to activate the electromagnet to form an oscillating magnetic field arranged to selectively and locally increase a temperature of the magnetic electrocatalyst to a predetermined temperature, forming one or more hot spots within the electrode based on one or more conditions, to increase kinetics of a reaction at the catalyzed electrode or remove water from the electrode, wherein the hot spots have a temperature higher than that of the ionomer.
An electrochemical system comprising:
- a cell including:
- an anode and a cathode separated by a membrane including an ionomer;
- the cathode including a magnetic electrocatalyst;
- an electromagnet;
- and
- a controller programmed to operate the electromagnet, responsive to the cell output, to selectively increase, decrease, and/or maintain the electrocatalyst temperature to accelerate cathodic reactions.
An electrochemical cell comprising:
- a selective hot-spot forming system including:
- an electromagnet arranged to form an oscillating electromagnetic field;
- and
- an electrode arranged within a radius of the oscillating electromagnetic field and having a magnetic electrocatalyst material whose temperature depends on a status of the electromagnet such that
- when the electromagnet is activated, the oscillating electromagnetic field increases the temperature of the magnetic electrocatalyst material to a first predetermined temperature, forming one or more localized hot spots within the electrode, and
- when the electromagnet is deactivated, the oscillating electromagnetic field ceases to increase the temperature of the magnetic electrocatalyst material and the magnetic electrocatalyst material has a second temperature, the predetermined first temperature being higher than the second temperate.
Dependencies are inferred from the claim text.