• 文献标题:   Three-dimensional interconnected network few-layered MoS2/N, S co-doped graphene as anodes for enhanced reversible lithium and sodium storage
  • 文献类型:   Article
  • 作  者:   YANG GH, LI X, WANG YY, LI QY, YAN ZX, CUI LS, SUN SH, QU YH, WANG HQ
  • 作者关键词:   mos2, n s codoped graphene, electrochemical exfoliation, lithium ion batterie, sodium ion batterie
  • 出版物名称:   ELECTROCHIMICA ACTA
  • ISSN:   0013-4686 EI 1873-3859
  • 通讯作者地址:   Guangxi Normal Univ
  • 被引频次:   11
  • DOI:   10.1016/j.electacta.2018.10.026
  • 出版年:   2019

▎ 摘  要

Rational design of efficient and durable anode materials is particularly momentous for high-performance lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). According to this concept, an effective strategy to prepare MoS2/N, S co-doped graphene by electrochemical exfoliation combining hydrothermal route is presented. Due to N and S atoms co-doping to graphene sheets, the three-dimensional interconnection of few-layered MoS2 and graphene, which contribute to relieving the restacking of the two components, accelerating the electrons transport and improving Li/Na storage capacity. As an anode in LIBs, the MoS2/NSG-AG demonstrates an up to reversible capacity of 1012 mAh g(-1) after cycling 300 times at 0.5 A g(-1) and good rate performance with a capability of 1300.7, 1215.2, 1106.3, 1005.5, 892.7 and 727.7 mAh g(-1) at 0.1, 0.2, 0.5, 1.0, 2.0 and 4.5 A g(-1), respectively. Furthermore, it delivers a maximum energy density of 890Wh kg(-1) along with the power density of 130 Wkg(-1). Meanwhile, when used in SIBs, it displays a good reversible capacity of 320.9 mAh g(-1) after cycling 500 times at 0.5 A g(-1). The prominent electrochemical performance could be due to the three-dimensional network formed by interconnection of MoS2 and graphene, co-doping of N and S, considerable surface area and rich mesoporous as well as the expanded layer spacing of graphene and MoS2. Therefore, this is a facile strategy to obtain high-performance hetero-structured anode and make it great potential applications in LIBs and SIBs. (c) 2018 Elsevier Ltd. All rights reserved.