Preparation and Characterization of La0.6Sr0.4Co0.2Fe0.8O3-δ-based Composite Anode for Solid Oxide Electrolysis Cell

doi:10.3724/SP.J.1077.2011.01049

Abstract

Abstract: La_0.6Sr_0.4Co_0.2Fe_0.8O_3-_δ (LSCF) based composite anode with SDC interlayer for solid oxide electrolysis cell was prepared by screen printing technique. Electrochemical performance of the electrode at 800℃ was examined by linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) methods. The result of EIS analysis suggestes that the oxidation kinetics of O^2- to O₂ is controlled by three electrode procedures, including charge transfer at the electrode/interlayer interface, charge transfer at the interlayer/electrolyte interface and oxygen desorption/diffusion. Scanning electron microscope analysis shows that composite anode layer, SDC interlayer and the electrolyte are integrated and well-combined. In terms of anode polarization, LSCF based material exhibites a better application perspective rather than traditional LSM-YSZ composite material for SOEC anode.

Key words: solid oxide electrolysis cell, composite anode, screen printing, electrochemical performance

CLC Number:

TQ174

KONG Jiang-Rong, ZHOU Tao, LIU Peng, ZHANG Yong, XU Jing-Ming. Preparation and Characterization of La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ-based Composite Anode for Solid Oxide Electrolysis Cell[J]. Journal of Inorganic Materials, 2011, 26(10): 1049-1052.

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Preparation and Characterization of La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ-based Composite Anode for Solid Oxide Electrolysis Cell

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