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US 11,791,108 B2Granted
Electrode and a pseudo-capacitor based on the electrode
AssigneeB.G. Negev Technologies and Applications Ltd., At Ben-Gurion University
InventorsAhiud Morag, Raz Jelinek
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Abstract
The invention provides a process for preparing an electrode, comprising: electrodeposition of metallic ruthenium/ruthenium oxide (Ru(0)/RuO2) coating onto a progressively etched nickel surface; and partial electrochemical oxidation of said metallic ruthenium to ruthenium oxide. The electrode produced and a pseudo-capacitor based on the electrode are also disclosed.
Claims21
A process for preparing an electrode, comprising:
- electrodeposition of metallic ruthenium/ruthenium oxide (Ru(0)/RuO2) coating onto a progressively etched nickel surface;
- and partial electrochemical oxidation of said metallic ruthenium to ruthenium oxide,
- wherein the electrodeposition and subsequent partial electrochemical oxidation are achieved with the aid of cyclic voltammetry, and
- wherein the electrodeposition is achieved with the aid of cyclic voltammetry of a nickel working electrode in Ru3+-containing deposition solution in the presence of added sulfate salt, between switching potentials in the range from 0 to −1.1 V versus reference electrode.
1 more element
An electrode comprising:
- a nickel-containing base;
- and
- a coating comprising metallic ruthenium/ruthenium oxide (RU(0)/RuO2) applied onto the nickel-containing base,
- wherein the nickel-containing base consists of 5 to 100 μm thick nickel foil and the Ru(0)/RuO2-containing coating is up to 500 nm thick.
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An electrode comprising:
- a nickel-containing base;
- and
- a coating comprising metallic ruthenium/ruthenium oxide (RU(0)/RuO2) applied onto the nickel-containing base,
- wherein an Ru(0) layer is interposed between the nickel-containing base and an outermost RuO2-containing layer, such that the ruthenium oxide is preferentially located atop of said Ru(0) layer.
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An electrode comprising:
- a nickel-containing base;
- and
- a coating comprising metallic ruthenium/ruthenium oxide (RU(0)/RuO2) applied onto the nickel-containing base,
- wherein the proportion between Ru0 and RuO2 on the surface of the coating, as determined by the intensity of peaks assigned to Ru0 and RuO2 in a deconvoluted X-ray photoelectron emission spectrum (XPS), varies from 7:1 to 1:7.
1 more element
An electrode comprising:
- a nickel-containing base;
- and
- a coating comprising metallic ruthenium/ruthenium oxide (RU(0)/RuO2) applied onto the nickel-containing base,
- wherein the coating comprises Ni(0)Ru(0) alloy phase applied onto the nickel-containing base, with RuO2 surface layer on said alloy.
1 more element
Dependencies are inferred from the claim text.