Cerium-zinc redox flow battery: Positive half-cell electrolyte studies
来源期刊：Journal of Rare Earths2011年第6期
论文作者：谢志鹏 周德璧 熊凤姣 张世明 黄可龙
文章页码：567 - 573
摘 要：Experimental work was performed to evaluate the Ce3+/Ce4+ redox couple in methane sulfonic acid （MSA） electrolyte for use in redox flow battery （RFB） technology. The electrochemical behaviour of the Ce3+/Ce4+ in MSA media was investigated using cyclic voltammetry, linear sweep voltammetry, chronoamperometry and rotating disc electrode. The standard rate constant of the Ce3+/Ce4+ redox reaction on graphite electrode in MSA was 4.06×10-4 cm/s. The diffusion coefficient of Ce3+ in MSA was 5.87-6.15×10?6 cm2/s, and was 2.56-2.68×10?6 cm2/s for Ce4+. The energy efficiency of a cerium-zinc test cell was 74.8%. The high stability of cerium salts in MSA media and relatively fast redox kinetics of the Ce3+/Ce4+ redox reaction at graphite ectrode indicated that the Ce3+/Ce4+ might be well suited for use in RFB technology.
谢志鹏1,2，周德璧1，熊凤姣1，张世明1，黄可龙1
1. College of Chemistry and Chemical Engineering, Central South University2. College of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology
摘 要：Experimental work was performed to evaluate the Ce3+/Ce4+ redox couple in methane sulfonic acid （MSA） electrolyte for use in redox flow battery （RFB） technology. The electrochemical behaviour of the Ce3+/Ce4+ in MSA media was investigated using cyclic voltammetry, linear sweep voltammetry, chronoamperometry and rotating disc electrode. The standard rate constant of the Ce3+/Ce4+ redox reaction on graphite electrode in MSA was 4.06×10-4 cm/s. The diffusion coefficient of Ce3+ in MSA was 5.87-6.15×10?6 cm2/s, and was 2.56-2.68×10?6 cm2/s for Ce4+. The energy efficiency of a cerium-zinc test cell was 74.8%. The high stability of cerium salts in MSA media and relatively fast redox kinetics of the Ce3+/Ce4+ redox reaction at graphite ectrode indicated that the Ce3+/Ce4+ might be well suited for use in RFB technology.
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