Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/76638
Title: Superior potassium ion storage via vertical MoS2 “Nano-rose” with expanded interlayers on graphene
Authors: Xie, K
Yuan, K
Li, X
Lu, W 
Shen, C
Liang, C
Vajtai, R
Ajayan, P 
Wei, B
Keywords: Anodes
Composites
Graphene
K-ion batteries
MoS2
Issue Date: 2017
Publisher: Wiley-VCH
Source: Small, 2017, v. 13, no. 42, 1701471, p. 2 How to cite?
Journal: Small 
Abstract: Potassium has its unique advantages over lithium or sodium as a charge carrier in rechargeable batteries. However, progresses in K-ion battery (KIB) chemistry have so far been hindered by lacking suitable electrode materials to host the relatively large K+ ions compared to its Li+ and Na+ counterparts. Herein, molybdenum disulfide (MoS2) “roses” grown on reduced graphene oxide sheets (MoS2@rGO) are synthesized via a two-step solvothermal route. The as-synthesized MoS2@rGO composite, with expanded interlayer spacing of MoS2, chemically bonded between MoS2 and rGO, and a unique nano-architecture, displays the one of the best electrochemical performances to date as an anode material for nonaqueous KIBs. More importantly, a combined K+ storage mechanism of intercalation and conversion reaction is also revealed. The findings presented indicate the enormous potential of layered metal dichalcogenides as advanced electrode materials for high-performance KIBs and also provide new insights and understanding of K+ storage mechanism.
URI: http://hdl.handle.net/10397/76638
ISSN: 1613-6810
EISSN: 1613-6829
DOI: 10.1002/smll.201701471
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