Review on zirconate-cerate-based electrolytes for proton-conducting solid oxide fuel cell
By N. Rashid, A. Samat, A. A. Jais, M. R. Somalu, A. Muchtar, N. A. Baharuddin, Wan Nor Roslam Wan Isahak. Ceramics International, 2019
168 citations recorded by the source corpus.
Abstract The performance of low-to-intermediate temperature (400–800 °C) solid oxide fuel cells (SOFCs) depends on the properties of electrolyte used. SOFC performance can be enhanced by replacing electrolyte materials from conventional oxide ion (O2-) conductors with proton (H+) conductors because H+ conductors have higher ionic conductivity and theoretical electrical efficiency than O2- conductors within the target temperature range. Electrolytes based on cerate and/or zirconate have been proposed as potential H+ conductors. Cerate-based electrolytes have the highest H+ conductivity, but they are chemically and thermally unstable during redox cycles, whereas zirconate-based electrolytes exhibit the opposite properties. Thus, tailoring the properties of cerate and/or zirconate electrolytes by doping with rare-earth metals has become a main concern for many researchers to further improve the ionic conductivity and stability of electrolytes. This article provides an overview on the properties of four types of cerate and/or zirconate electrolytes including cerate-based, zirconate-based, single-doped cerate–zirconate and hybrid-doped cerate–zirconate. The properties of the proton electrolytes such as ionic conductivity, chemical stability and sinterability are also systematically discussed. This review further provides a summary of the performance of SOFCs operated with cerate and/or zirconate proton conductors and the actual potential of these materials as alternative electrolytes for proton-conducting SOFC application.
Subfields: Electronic, Optical and Magnetic Materials, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/4e420caa83d66a3ba686ca204b81d5555879e901
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Citations in the corpus
- Direct ammonia solid-oxide fuel cells: A review of progress and prospects (2021, background): “Electrolyte materials, which have been extensively studied [35,36], transport the oxide ions or protons between anode and cathode to complete the electrochemical reactions.”