期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 788, 期 -, 页码 407-412出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.02.234
关键词
Rechargeable batteries; Chloride ion batteries; Iron oxychloride; Polypyrrole; Core-shell; Electrochemistry
资金
- National Natural Science Foundation of China [51674147, U1407106]
- Natural Science Foundation of the Jiangsu Higher Education Institutions [16KJA430001]
- Natural Science Foundation of Jiangsu Province [BK20161544]
- QingLan Project of Jiangsu Province
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
Iron oxychloride has been regarded as a promising cathode material for chloride ion batteries ( CIBs). However, it suffers a severe capacity decay during repeated conversion reactions based on chloride ion transfer. Herein, we report an iron oxychloride composite material with a polypyrrole coating ( FeOCl@PPy), which is prepared by a facile and efficient chemical vapor phase polymerization method, as cathode for CIB. The as- prepared FeOCl@PPy cathode material with drastically enhanced charge transfer and chloride ion diffusion shows a stable core- shell structure, which can prevent the FeOCl particles from pulverization during cycling. As a result, a maximum capacity of 187mA h g (-1) and significantly improved cycling stability with 82.9% capacity retention after 30 cycles are obtained. In contrast, the neat FeOCl cathode fades fast and shows only 13.2% capacity retention. (C) 2019 Elsevier B.V. All rights reserved.
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