期刊
JOURNAL OF POWER SOURCES
卷 343, 期 -, 页码 483-491出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2017.01.097
关键词
Sodium ion batteries; Anode material; NiSe2; Electrochemical performance; In situ X-ray diffraction
资金
- Natural Science Foundation of China [51402109]
- Project of Public Interest Research and Capacity Building of Guangdong Province [2014A010106007]
- Pearl River S&T NovaProgram of Guangzhou [201506010030]
- Guangdong Innovative and Entrepreneurial Research Team Program [2014ZT05N200]
- Guangdong Natural Science Funds for Distinguished Young Scholar [2016A030306010]
Reduced graphene oxide (rGO) homogenously wrapped nickel diselenide (NiSe2/rGO) hybrid has been prepared by a facile one-spot hydrothermal method. When investigated as anode material for sodium ion batteries (SIBs), NiSe2/rGO hybrid delivers a high reversible capacity (433 mAh g(-1) at 100 mA g(-1) superior rate performance (406, 386, 366, 347 and 318 mAh g(-1) at 200, 500, 1000, 2000 and 5000 mA g(-1), respectively) and excellent cycling stability (a capacity retention of 346 mAh g(-1) after 1000 cycles at 1000 mA g(-1)) within the 0.4-3.0 V voltage range. In situ XRD analysis and ex situ SEM/TEM measurement reveal that the high capacity of NiSe2/rGO is originated from the combined Na+ intercalation and conversion reactions. These results validate the impact of voltage range on electrochemical property, providing a new route to rationalize the limiting factors that affect the performance of NiSe2 anode material. The facile synthesis and superior electrochemical performance of the NiSe2/rGO hybrid render it a promising anode material for SIBs. (C) 2017 Elsevier B.V. All rights reserved.
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