Physical properties and electrochemical performance of solid K2FeO43 samples prepared by ex-situ and in-situ electrochemical methods

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	Physical properties and electrochemical performance of solid K2FeO43 samples prepared by ex-situ and in-situ electrochemical methods
	Z. H. Xu; J. M. Wang; H. B. Shao; J. Q. Zhang
	2007
发表期刊	Chinese Journal of Chemical Engineering
ISSN	1004-9541
卷号	15 期号:1 页码:39-43
摘要	K2FeO4 powders were synthesized by the ex-situ and in-situ electrochemical methods, respectively, and characterized by infrared spectrum (IR), scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and BET. Their electrochemical performances were investigated by means of galvanostatic discharge and electrochemical impedance spectroscopy (EIS). The results of physical characterization showed that the two samples have similar structural features, but their surface morphologies and oriented growth of the crystals are different, which results in smaller specific surface area and lower solubility of the ex-situ electrosynthesized K2FeO4 sample. The results of discharge experiments indicated that the ex-situ electrosythesized K2FeO4 electrode has much larger discharge capacity and lower electrode polarization than the in-situ electrosynthesized K2FeO4 electrode. It was found from the results of EIS that lower electrochemical polarization might be responsible for the improvement on the discharge performance of the ex-situ electrosynthesized K2FeO4 electrode.
部门归属	zhejiang univ, dept chem, hangzhou 310027, peoples r china. chinese state key lab corros & protect, shenyang 110015, peoples r china.;wang, jm (reprint author), zhejiang univ, dept chem, hangzhou 310027, peoples r china;wjm@cmsce.zju.edu.cn
关键词	K2feo4 Electrosynthesis Discharge Performance Electrochemical Impedance Spectroscopy (Eis) Super-iron Battery Fe(Vi) Ferrate Fuel-cell Electrolyte Cathodes
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33959
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. H. Xu,J. M. Wang,H. B. Shao,et al. Physical properties and electrochemical performance of solid K2FeO43 samples prepared by ex-situ and in-situ electrochemical methods[J]. Chinese Journal of Chemical Engineering,2007,15(1):39-43.
APA	Z. H. Xu,J. M. Wang,H. B. Shao,&J. Q. Zhang.(2007).Physical properties and electrochemical performance of solid K2FeO43 samples prepared by ex-situ and in-situ electrochemical methods.Chinese Journal of Chemical Engineering,15(1),39-43.
MLA	Z. H. Xu,et al."Physical properties and electrochemical performance of solid K2FeO43 samples prepared by ex-situ and in-situ electrochemical methods".Chinese Journal of Chemical Engineering 15.1(2007):39-43.