Preparation of MoS2/graphene and its performance for anode materials of Li-ion battery

doi:10.16085/j.issn.1000-6613.2017-0457

Abstract

Abstract: A facile solvothermal approach has been developed to fabricate graphene-based MoS₂ composite,which used PVP decorated graphene as the carrier and sodium molybdate and thiourea as the starting materials. The structure and morphology of the composite were characterized by field-emission scanning electron microscope(FESEM),transmission electron microscope(TEM),X-ray diffractometer(XRD)and X-ray photoelectron spectrum(XPS)respectively. Electrochemical performances of the material were also evaluated. The result demonstrated that the usage of graphene as substrate can prevent the aggregation of MoS₂ sheets and thus lead to adequate contact between the active material and the electrolyte. MoS₂/graphene composite manifests superior reversible specific capacity(about 800mA·h/g,50 cycles)and excellent rate capability as anode materials in lithium-ion batteries.

Key words: molybdenum sulfide, graphene, composites, synthesis, electrochemistry

摘要： 以聚乙烯吡咯烷酮（PVP）修饰的氧化石墨烯（GO）为载体，钼酸钠（Na₂MoO₄）、硫脲[CS（NH₂）₂]作为前体，采用溶剂热合成方法制得石墨烯基硫化钼（MoS₂）复合材料，通过场发射扫描电子显微镜（FESEM）、透射电子显微镜（TEM）、X射线衍射仪（XRD）、X射线光电子能谱（XPS）等对材料的结构和形貌进行表征，并对材料作电化学性能测试。结果表明：石墨烯作为载体可以阻止MoS₂片层的团聚，使电解液与活性物质充分接触，进而提高活性物质的利用率。MoS₂/石墨烯作为锂离子电池负极材料表现出良好的可逆比容量（约800mA·h/g，循环50次）和优异的倍率性能。

关键词: 硫化钼, 石墨烯, 复合材料, 合成, 电化学

CLC Number:

TM914

TAN Fengzhi, ZHAO Yanru, CAO Yafeng, WANG Yuanhao, SUN Yanfeng. Preparation of MoS₂/graphene and its performance for anode materials of Li-ion battery[J]. Chemical Industry and Engineering Progress, 2017, 36(12): 4519-4523.

谭凤芝, 赵艳茹, 曹亚峰, 汪源浩, 孙岩峰. MoS₂/石墨烯锂离子电池负极材料的制备及其性能[J]. 化工进展, 2017, 36(12): 4519-4523.

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Preparation of MoS₂/graphene and its performance for anode materials of Li-ion battery

MoS₂/石墨烯锂离子电池负极材料的制备及其性能

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