氧化石墨烯添加量对Bi2S3/rGO复合材料储锂性能的影响探究

Influences of GO content on properties of Bi2S3/rGO anode for Li-ion batteries

本文采用简单超声法成功制备了硫化铋纳米颗粒与石墨烯(Bi2S3/rGO)复合材料,并探究前驱体氧化石墨烯(GO)添加量对Bi2S3/rGO复合材料储锂性能影响。利用扫描电镜(SEM)、透射电镜(TEM)、能谱(EDS)、X-射线衍射(XRD)、拉曼光谱(Raman)等测试技术对其微观形貌、元素分布及物相结构进行表征,并利用电化学工作站和电池测试系统对其电化学性能进行测试。结果表明,添加20 mg GO制备出的复合材料,Bi2S3纳米颗粒在石墨烯片层中分布均匀,周围无散落,作为锂离子电池负极材料比容量较高,循环与倍率稳定性较优。

In this paper,the reductive oxidation graphene with bismuth sulfide nanoparticles(Bi2S3/rGO)had been successful synthesized via a simple ultrasonic method at room temperature,and the effect of the precursor GO on microstructure and electrochemical performance of Bi2S3/rGO were explored.The morphology and microstructure of samples were investigated by scanning electron microscope(SEM),transmission electron microscope(TEM),energy dispersive spectroscopy(EDS),X-ray single crystal diffractometer(XRD)and Raman spectra(Raman).The electrochemical performances of the samples were investigated by electrochemical workstation and battery test system.The results showed that the composite materials prepared by Bi2S3 nanoparticles with the addition of 20 mg GO were evenly distributed in the graphene sheet layer without scattering around.As an anode material of lithium ion battery,which had a high specific capacity and excellent cycling and rate stability.