New Chemical Materials >

2023 , Vol. 51 >Issue 2: 135 - 141

DOI: https://doi.org/10.19817/j.cnki.issn1006-3536.2023.02.028

Effect of carbon content on the electrochemical performance of MoS2/GR composite electrode materials

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  • College of Material Science and Engineering,Liaoning Technical University,Fuxin 123000

Received date: 2021-10-20

  Revised date: 2022-09-30

  Online published: 2023-03-01

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Abstract

Graphene residual carbon (GR) was obtained via high temperature charring and potassium hydroxide (KOH) activation of the by-products from graphene preparation by Hummers method.Using GR,sodium molybdate and thiourea as raw materials,the molybdenum disulphide/graphene residual carbon (MoS2/GR) composite electrode material was prepared by a simple one-step hydrothermal method in a pH=3 pre-solution.The effect of the addition of GR on the electrochemical properties of MoS2/GR was investigated by varying the amount of graphene GR (5%,10% and 15%).The structure,morphology and electrochemical properties of the composite electrode materials were characterised and tested by X-ray diffractometer,scanning electron microscope and electrochemical workstation.The results showed that the addition of GR reduced the crystallinity of MoS2 and the size of MoS2/GR decreased with the increase of GR addition.When GR of 15% mass fraction was added,the prepared sample 15MoS2/GR had the highest specific capacitance of 312.0F/g,which was nearly 3 times higher than that of pure MoS2(110F/g).It also presented a good cycling stability with a capacity retention rate of 96.3% after 1000 cycles at a current density of 5A/g.Quantitative kinetic calculations revealed that the energy storage of 15MoS2/GR was dominated by a diffusion contribution.

Key words： electrode material; MoS2; graphene residual carbon; electrochemical performance

Cite this article

Yang Fang, Huang Hao, Zhu Jiaying, Dong Wei, Wu Qiqi, Li Hongyu . Effect of carbon content on the electrochemical performance of MoS2/GR composite electrode materials[J]. New Chemical Materials, 2023 , 51(2) : 135 -141 . DOI: 10.19817/j.cnki.issn1006-3536.2023.02.028

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