三导电LiNi0.8Co0.15Al0.05O2-δ层状氧化物与SrSc0.2Co0.8O3-δ阴极复合提高低温固体氧化物燃料电池的电化学性能

IF 8.3 2区 工程技术 Q1 CHEMISTRY, PHYSICAL
Dan Zheng , Hui Huang , Yifan Yin , Baoyuan Wang
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引用次数: 0

摘要

为实现固体氧化物燃料电池(SOFC)优异的催化活性、高的电子导电性和良好的稳定性,设计了多种复合阴极。以往的研究表明,Sc3+掺杂可以提高SrCoO3阴极的稳定性,获得优异的电化学性能,但Sc掺杂也会使SrCoO3基材料的电子导电性恶化。为了弥补Sc掺杂导致的电导率下降的缺点,引入具有高电导率的LiNi0.8Co0.15Al0.05O2-δ(NCAL)氧化层,与SrSc0.2Co0.8O3-δ(SS0.2CO)结合形成复合阴极。将SS0.2CO与NCAL按1:2、1:1和2:1的质量比组成,并通过XRD、SEM等表征技术对复合材料的物相和形貌进行分析。利用制备的复合阴极构建Ni-NCAL/SDC/NCAL-SS0.2CO电池,并对其电化学性能和氧化还原反应的催化活性进行了评价。I-V曲线和I-P曲线表明,以1NCAL-1SS0.2CO复合阴极为基极的电池在550℃时的最佳输出功率为764 mW cm - 2,在450℃时的最佳输出功率为400 mW cm - 2。结果表明,与单相SS0.2CO阴极相比,NCAL-SS0.2CO复合阴极的ORR催化活性较差,但电导率较高,证明了NCAL-SS0.2CO复合阴极的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Triple-conducting LiNi0.8Co0.15Al0.05O2-δ layered oxide compositing with SrSc0.2Co0.8O3-δ cathode to improve the electrochemical performance for low-temperature solid oxide fuel cell
Various of composite cathodes are designed to achieve excellent catalytic activity, high electronic conductivity and promising stability for solid oxide fuel cell (SOFC). Previous studies have showed that Sc3+ doping can improve the stability of SrCoO3 cathode and obtained excellent electrochemical performance, but Sc doping also deteriorated the electronic conductivity of SrCoO3 based material. In order to make up the drawback of electronic conductivity caused by Sc doping, LiNi0.8Co0.15Al0.05O2-δ(NCAL) layer oxide with high electronic conductivity was introduced to combine with SrSc0.2Co0.8O3-δ(SS0.2CO) as a composite cathode. SS0.2CO were composed with NCAL according to the weight ratio of 1:2, 1:1 and 2:1, and the phase and morphology of the composite material were analyzed by XRD, SEM and other characterization technology. The prepared composite cathode was used to construct Ni-NCAL/SDC/NCAL-SS0.2CO cell, and the electrochemical performance and catalytic activity for oxidant reduction reaction were evaluated. The I–V and I–P curves show that the cell based on 1NCAL-1SS0.2CO composite cathode has the optimum performance output of 764 mW cm−2 at 550 °C and even 400 mW cm−2 at 450 °C. As the result revealed, NCAL-SS0.2CO composite cathode presented worse ORR catalytic activity but higher electronic conductivity compared with single phase SS0.2CO cathode, which proves the effectiveness of NCAL-SS0.2CO composite cathode.
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来源期刊
International Journal of Hydrogen Energy
International Journal of Hydrogen Energy 工程技术-环境科学
CiteScore
13.50
自引率
25.00%
发文量
3502
审稿时长
60 days
期刊介绍: The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.
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