期刊
APPLIED SURFACE SCIENCE
卷 566, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2021.150645
关键词
SnS2; In-situ sulfuration; Hexagonal nanosheet; Anode; Lithium storage
类别
资金
- Natural Science Foundation of Shaanxi Province [2019JQ-911, 2019JQ-916]
- National Natural Science Foundation of China [5187010644]
- Natural Science Basic Research Plan in Shaanxi Province of China [2020JM-631]
- Young Talent fund of University Association for Science and Technology in Shaanxi, China [20200430]
- Undergraduate Innovation and Entrepreneurship Training Program [S202011736028]
- Science Foundation of the Science and Technology Bureau of xi 'an, Shanxi Province [2019217314GXRC009CG010-GXYD9.1]
SnS2/CNTs composite exhibits better cycling and rate performances as an anode material for LIBs, attributed to its easier Li+ storage and transfer characteristics compared to SnO2/CNTs.
SnS2/CNTs composite with hexagonal SnS2 nanosheet growing along carbon nanotube (CNTs) by C-S bonding is synthesized via in-situ sulfuration of prefabricated SnO2/CNTs in the liquid environment. When they are used as Li ion batteries (LIBs) anode materials, the SnS2/CNTs exhibits much better cycling and rate performances than that of SnO2/CNTs. Through in-situ XRD characterization, SnS2/CNTs electrode possesses an additional Li+ intercalation reaction besides conversion and alloying/dealloying reaction in the first cycle. Further analysis by density functional theory (DFT) computations finds that hexagonal SnS2 exhibits lower Li+ adsorption energies and migration barrier than tetragonal structured SnO2, suggesting that Li+ storage and transfer in the SnS2/CNTs electrode is much easier and faster than SnO2/CNTs. As a consequence, SnS2/CNTs composite is more favorable for Li+ storage and is a promising anode material for LIBs.
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