Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11008101 | Electrochimica Acta | 2019 | 13 Pages |
Abstract
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 1012â¯mAh gâ1 after cycling 300 times at 0.5â¯Aâ¯gâ1 and good rate performance with a capability of 1300.7, 1215.2, 1106.3, 1005.5, 892.7 and 727.7â¯mAh gâ1 at 0.1, 0.2, 0.5, 1.0, 2.0 and 4.5â¯Aâ¯gâ1, respectively. Furthermore, it delivers a maximum energy density of 890â¯Wh kgâ1 along with the power density of 130â¯Wâ¯kgâ1. Meanwhile, when used in SIBs, it displays a good reversible capacity of 320.9â¯mAh gâ1 after cycling 500 times at 0.5â¯Aâ¯gâ1. 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.
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Physical Sciences and Engineering
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Authors
Guanhua Yang, Xin Li, Yiyan Wang, Qingyu Li, Zhixiong Yan, Lisan Cui, Shuhui Sun, Yonghao Qu, Hongqiang Wang,