Enhanced electrochemical performance of a LTO/carbon nanotubes/graphene composite as an anode material for Li-ion batteries

2017 3rd International Conference on Applied Materials and Manufacturing Technology

Wei, Aijia^1,2 ; Li, Wen^1,2 ; Zhang, Lihui^1,2 ; Liu, Zhenfa^1,2

Institute of Energy Resources, Hebei Academy of Science, Shijiazhuang, China^1

Hebei Engineering Research Center for Water Saving in Industry, Shijiazhuang, Hebei

050081, China^2

关键词: Anode material;    Charge capacities;    Electrochemical performance;    Electronic conductivity;    Graphene sheets;    Solid state method;    Structure and morphology;    Synergistic effect;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/242/1/012013/pdf
DOI  :  10.1088/1757-899X/242/1/012013

来源: IOP

【 摘 要 】

A Li4Ti5O12/carbon nanotubes/graphene composite has been successfully prepared by a solid-state method. For comparison, pure LTO and Li4Ti5O12/graphene composite were also synthesized using the same method. The materials were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) to confirm the structure and morphology. The results reveal that LTO particles are well dispersed and wrapped in the graphene sheets with cross-linked carbon nanotubes. The electrochemical results show that the Li4Ti5O12/carbon nanotubes/graphene composite exhibits the best rate capacity, which lead to a charge capacity of 169.0, 168.5, 167.1, 153.2, 144.5, 131.5 mAh g-1at 0.2, 0.5, 1, 3, 5 and 10 C, respectively between 1 and 3 V (1 C = 160 mAh g-1). The synergistic effect of graphene and carbon nanotubes constructing 3D networks could enhance the electronic conductivity of Li4Ti5O12/carbon nanotubes/graphene composite.