Synthesis and electrochemical performance of a spherical flower-like MoS<sub>2</sub>/graphene anode material for lithium ion batteries

MOU Yan-pu; WANG Cong; ZHAN Liang; LIU Xiang; Wang Yan-li

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Article Navigation > New Carbon Mater. > 2016 > 31(6): 609-614

MOU Yan-pu, WANG Cong, ZHAN Liang, LIU Xiang, Wang Yan-li. Synthesis and electrochemical performance of a spherical flower-like MoS2/graphene anode material for lithium ion batteries. New Carbon Mater., 2016, 31(6): 609-614.

Citation:

MOU Yan-pu, WANG Cong, ZHAN Liang, LIU Xiang, Wang Yan-li. Synthesis and electrochemical performance of a spherical flower-like MoS₂/graphene anode material for lithium ion batteries. New Carbon Mater., 2016, 31(6): 609-614.

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Synthesis and electrochemical performance of a spherical flower-like MoS₂/graphene anode material for lithium ion batteries

State Key Laboratory of Chemical Engineering, Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China

Funds: National Natural Science Foundation of China(51472086,51002051);Natural Science Foundation of Shanghai City(12ZR1407200).

Received Date: 2016-10-01
Accepted Date: 2016-12-26
Rev Recd Date: 2016-12-03
Publish Date: 2016-12-28

Abstract

Abstract

A MoS₂/graphene composite was synthesized at 240℃ by a hydrothermal method using graphene oxide, Na₂MoO₄ and CS(NH₂)₂ as the raw materials. Results indicate that the spherical flower-like MoS₂ structure was self-assembled by thin MoS₂ micrometer size layers and dispersed uniformly on the surface of graphene. The MoS₂/graphene composite as an anode material retains a capacity of 735.2 mAh/g after 100 cycles under a current density of 100 mA/g and has a good rate performance (490.3 mAh/g at 400 mA/g and 411.9 mAh/g at 800 mA/g). The excellent electrochemical performance of the composite is attributed to its special structure. The thin MoS₂ layers shorten the diffusion and transport paths for Li⁺ ions and electrons. The abundant mesopores are beneficial for ion diffusion and act as a buffer to inhibit volume changes during charge-discharge. Graphene increases the charge-discharge rate of MoS₂ effectively owing to its high conductivity and high surface area.
- MoS₂,
- Graphene,
- Anode material,
- Lithium-ion battery

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References(19)

References

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