期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 777, 期 -, 页码 127-134出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.10.371
关键词
Iron oxides; Electrospinning; Binder-free anodes; Lithium ion batteries; Sodium ion batteries
资金
- Natural Science Foundation of Jiangsu Province [17KJB430028, BK20170341, BK20161209]
- Postdoctoral Science Foundation of China [2017M611899, 2018T110544]
- National Thousands Young Talents Program of China
- Suzhou Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies
A facile strategy of electrospinning has been employed to fabricate freestanding anodes of gamma-Fe2O3/porous carbon fibers (gamma-Fe2O3/PCF) for both lithium and sodium ion batteries, in which gamma- Fe2O3 nanoparticles ranging from 50 to 150 nm were in-situ formed and embedded in the porous carbon fibers. The thus obtained composite delivers highly reversible discharge capacities of 980 mAh g(-1) in lithium ion batteries and 291 mAh g(-1) in sodium ion batteries, corresponding to high capacity retentions of 97 and 78%, respectively. The superior electrochemical performance of the binder-free anodes can be attributed to the unique composite structure with gamma-Fe2O3 nanoparticles homogenously dispersed in the porous carbon fibers, which should help alleviate the volumetric fluctuation, promote the wettability of electrolyte, and enhance the electronic conductivity, demonstrating a promising candidate as the flexible anode material for high-performance energy storage devices. (C) 2018 Elsevier B.V. All rights reserved.
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