期刊
ELECTROCHIMICA ACTA
卷 151, 期 -, 页码 8-15出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.11.009
关键词
Tin oxide; Reduced graphene oxide; Sodium-ion battery; Electrochemical performance; Solid electrolyte interface
资金
- National Basic Research Program of China [2013CB934001]
- National Natural Science Foundation of China [51101139]
- Fundamental Research Funds for the Central Universities [2014XZZX002-03]
- Key Science and Technology Innovation Team of Zhejiang Province [2010R50013]
- Program for Innovative Research Team in University of Ministry of Education of China [IRT13037]
Na-ion Battery is attractive alternative to Li-ion battery due to the natural abundance of sodium resource. Searching for suitable anode materials is one of the critical issues for Na-ion battery due to the low Nastorage activity of carbon materials. In this work, we synthesized a nanohybrid anode consisting of ultrafine SnO2 anchored on few-layered reduced graphene oxide (rGO) by a facile hydrothermal route. The SnO2/rGO hybrid exhibits a high capacity, long cycle life and good rate capability. The hybrid can deliver a high charge capacity of 324 mAh g(SnO2)(-1) at 50 mA g(-1). At 1600 mA g(-1) (2.4C), it can still yield a charge capacity of 200 mAh g(SnO2)(-1). After 100 cycles at 100 mA g(-1), the hybrid can retain a high charge capacity of 369 mAh g(SnO2)(-1). X-ray photoelectron spectroscopy, ex situ transmission electron microscopy and electrochemical impedance spectroscopy were used to investigate the origin of the excellent electrochemical Na-storage properties of SnO2/rGO. (C) 2014 Elsevier Ltd. All rights reserved.
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