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US 6,274,021 B1Granted
Method for making layer electrodes
AssigneesStadtwerke Karlsruhe GmbH, EnBW Regional GmbH
InventorHans Juergen Pauling
Life of this patent
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Abstract
The invention relates to a method and an apparatus for producing an electrode coating. The fundamental idea of the invention is to regulate in a time-defined manner at any instant during an electrolytic deposition process the concentration of the electrolyte constituents and additives in that in the electrolytic bath are provided additional electrodes, through which specific electrolyte constituents and/or additives can be taken up and/or delivered in time-controlled manner.
Claims16
Method for the production of a coating for an electrode, having the steps of:
- introducing a deposit support electrode into an electrolyte space filled with an electrolyte and with a counterelectrode configuration,
- introducing additional electrodes in the electrolyte space, the additional electrodes being capable of transferring electrolyte additives from the solution of the electrolyte to the additional electrodes and dissolving electrolyte additives from the additional electrodes into the electrolyte upon the application of current to the additional electrodes,
- electrical connection of the deposit support electrode to the counterelectrode configuration by means of a current source,
- electrical connection of the additional electrodes to the current source,
- electrolyte deposition of a coating on the deposit support electrode by supplying current and voltage for a predetermined time to at least the deposit support electrode and counterelectrode configuration,
- during said electrolyte deposition step, controlling the composition and structure of the coating deposited on the deposit support electrode by supplying the additional electrodes with current in a time-controlled matter to take up electrolyte additives from the electrolyte and to deliver electrolyte additives to the electrolyte,
- separating the coated deposit support electrode from the counterelectrode configuration,
- following said separating step, removing the coated deposit support electrode from the electrolyte space,
- following said step of removing the coated deposit support electrode removing the deposited coating from the deposit support electrode, and
- following said step of removing the deposited coating, transferring the removed coating and pressing it on a separate support.
7 more elements
Dependencies are inferred from the claim text.