Composite fuel electrode for high temperature electrolytic cell and preparation method thereof

Abstract

The invention discloses a composite fuel electrode for a high temperature solid oxide CO2 electrolytic cell and a preparation method thereof. The structure of the composite fuel electrode is that an LSCrFe or LSCrFe-GDC base layer covers an electrolyte layer of the semi-electrolytic cell sheet, and an active catalytic layer covers the base layer. LSCrFe and LSCrFe-GDC powders are prepared by a combustion method or a co-synthesis method, the fuel electrode base layer is prepared by a screen printing method, slurry coating method or spin coating method, then the active catalyst layer of the nanofuel electrode is prepared by an impregnation method, and the composite fuel electrode for the high temperature solid oxide CO2 electrolytic cell is obtained after high temperature sintering. The prepared composite fuel electrode for the high temperature solid oxide CO2 electrolytic cell has good electrochemical performance for high-temperature CO2 electrolysis, the performance and operational stability of the solid oxide electrolysis cell can be significantly improved, and the composite fuel electrode has a good development prospect. The invention is applicable to the field of high-temperature carbon dioxide reduction, the technical of clean carbon fuel preparation and the technical field of energies and fuel cells.

Description

technical field [0001] The invention relates to the technical fields of energy and fuel cells, in particular to a composite fuel electrode for an electrolytic cell and a preparation method thereof. Background technique [0002] With the rapid growth of global fossil energy consumption, how to effectively control greenhouse gas emissions and slow down global warming has become a common problem facing the sustainable development of human society. As the most potential large-scale control CO 2 Emission technology, CO 2 Capture, utilization and storage technology has been highly valued by governments. However, efficient and low-cost CO 2 Electrochemical conversion technology is effectively promoting CO 2 At the same time of capture and utilization, the storage of renewable energy power can be realized, which is a path to alleviate energy crisis and environmental problems at the same time. [0003] A solid oxide electrolysis cell (SOEC) is an electrochemical device that conv...

AI Technical Summary

Problems solved by technology

[0004] at high temperature CO 2 In the electrolytic cell, the traditional fuel electrode is usually a porous electrode composed of metal Ni and YSZ, but its high temperature CO 2 There are still some unresolved problems in the application of electrolysis: such as poor oxygen reduction stability, a certain concentration of reducing gas is required to prevent the Ni in the electrode from being oxidized to NiO, and Ni particles are agglomerated at high temperature, volatilized at high temperature, and susceptible to various impurity elements. Lead to battery performance degradation, as well as carbon deposits and other issues