Preparation and application of a multi-stage structure composite electrode material

By preparing multi-level nanostructured composite electrode materials, the three-phase interface was expanded, solving the problems of limited catalytic reaction rate and poor resistance to CO2 poisoning in solid oxide electrolyzers, and realizing efficient carbon dioxide utilization and energy conversion.

CN117684198BActive Publication Date: 2026-07-24DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
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Patent Information

Application Number
CN202211074054.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-09-02
Publication Date
2026-07-24
Estimated Expiration
2042-09-02

AI Technical Summary

Technical Problem

In existing solid oxide electrolyzers, the lack of a three-phase interface limits the catalytic reaction rate, and commonly used electrode materials have insufficient resistance to poisoning in CO2 environments, making it difficult to effectively utilize carbon dioxide resources.

Method used

A multi-level nanostructured composite electrode material, including perovskite-fluorite structured oxides and nanoparticles, is prepared by a self-propagating combustion method. This method expands the three-phase interface, increases reaction sites, and exhibits good electrical conductivity and resistance to CO2 poisoning. It also possesses catalytic activity for both oxygen evolution reaction and carbon dioxide reduction reaction.

Benefits of technology

It effectively expands the three-phase interface, improves reaction efficiency, enhances the resistance of electrode materials to CO2 poisoning, increases current density and Faraday efficiency, simplifies the preparation process, and improves energy utilization efficiency.

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Abstract

The application discloses preparation and application of a multi-level structure composite electrode material. The electrode material comprises a perovskite-fluorite structure oxide and nanoparticles; the chemical formula of the perovskite-fluorite structure oxide is Pr 1‑x Ba x Co 1‑y‑z Fe y Ti z O 3‑δ ‑Ln 0.2 Ce 0.8 O 2‑δ , wherein Ln=Gd, Sm, La, 0 3‑δ <0.5, and the oxygen vacancy content is δ; the loading of the nanoparticles is 0-10 wt.%, and the end value 0 is excluded. The electrode material has a multi-level nanostructure, can effectively expand a three-phase interface, increase reaction sites, has good conductivity and CO2 poisoning resistance, and has catalytic activity of both oxygen evolution reaction and carbon dioxide reduction reaction, and can be used as both an anode material and a cathode electrode material of a SOEC.
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