Overview of Approaches to Increase the Electrochemical Activity of Conventional Perovskite Air Electrodes

Abstract

The progressive research trends in the development of low-cost, commercially competitive solid oxide fuel cells with reduced operating temperatures are closely linked to the search for new functional materials as well as technologies to improve the properties of established materials traditionally used in high-temperature devices. Significant efforts are being made to improve air electrodes, which significantly contribute to the degradation of cell performance due to low oxygen reduction reaction kinetics at reduced temperatures. The present review summarizes the basic information on the methods to improve the electrochemical performance of conventional air electrodes with perovskite structure, such as lanthanum strontium manganite (LSM) and lanthanum strontium cobaltite ferrite (LSCF), to make them suitable for application in second generation electrochemical cells operating at medium and low temperatures. In addition, the information presented in this review may serve as a background for further implementation of developed electrode modification technologies involving novel, recently investigated electrode materials.

Correction: Filonova, E.; Pikalova, E. Overview of Approaches to Increase the Electrochemical Activity of Conventional Perovskite Air Electrodes. Materials 2023, 16, 4967

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Influence of drying conditions and plasticizer‐to‐binder ratio on the water‐based tape casting of La0.6Sr0.4Co0.2Fe0.8O3−δ

“…La 1− x Sr x Co y Fe 1− y O 3− δ (LSCF) is one of the most studied perovskite materials to be used as a cathode in solid oxide fuel cells (SOFC) or as oxygen transport membrane (OTM) in many mass‐production industries, due to its high mixed ionic and electronic conductivity, good catalytic activity, and high stability toward oxidation, even at low‐intermediate temperatures (<800°C) 1 …”

Design of Mixed Ionic-Electronic Materials for Permselective Membranes and Solid Oxide Fuel Cells Based on Their Oxygen and Hydrogen Mobility

“…The environmentally and economically efficient production of hydrogen and syngas for the above-mentioned polygeneration systems [ 27 ] and the dominant strategy to reduce the operating temperature of SOFCs [ 28 ] require the development of high-performance construction materials. They can be used for the design of electrodes [ 29 , 30 , 31 , 32 , 33 , 34 , 35 ] and electrolytes [ 36 , 37 , 38 , 39 , 40 , 41 ] in SOFCs and for the design of gas separation membranes [ 42 , 43 , 44 , 45 , 46 ] as well as in catalytic membrane reactors [ 47 , 48 , 49 ]. Oxide materials with mixed ionic-electronic conductivity (or mixed ionic electron conductors, MIECs) are considered as a prospective class of multifunctional materials and are widely investigated for their use in both SOFCs and membrane reactors [ 50 , 51 , 52 , 53 , 54 , 55 , 56 ].…”