期刊
JOURNAL OF POWER SOURCES
卷 379, 期 -, 页码 182-190出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2018.01.051
关键词
Anode; Lithium-ion batteries; Tin chalcogenide; High electrochemical performance; In-situ XRD
资金
- Shenzhen Fundamental Research Program of Subject Distribution [JCYJ20170413102735544]
- National Natural Science Foundation of China [51622202, 21503009, U1507107]
- Fundamental Research Program of the 4th introduced innovative and entrepreneurial team of Guangdong of Dongguan McNair Technology Co., LTD [2013N079]
As an advanced anode material for lithium-ion batteries, tin-chalcogenides receive substantial attention due to their high lithium-ion storage capacity. Here, tin chalcogenide (SnSe0.5S0.5) nanoplates are synthesized using a facile and quick polyol-method, followed by heating at different temperatures. Results show that the as-prepared of SnSe0.5S0.5 heated at temperature of 180 degrees C exhibits the best electrochemical performance with an outstanding discharge specific capacity of 1144 mA h g(-1) at 0.1 A g(-1) after 100 cycles and 682 mA h g(-1) at 0.5 A g(-1) after 200 cycles with a high coulombic efficiency (CE) of 98.7%. Even at a high current density of 5 A g(-1), this anode material delivers a specific capacity of 473 mA h g(-1). The high electrochemical performance of SnSe0.5S0.5 is shown by in-situ XRD analysis to originate from an enhanced Li+ intercalation and an alloy conversion process.
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