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Preparation of LiCoO2 composite coated with graphene and PEDOT∶PSS with enhanced electrochemical properties at high voltage for lithium-ion batteries

Wang, Jixian ; Peng, Sikan ; Wang, Chen ; Nan, Wenzheng ; Liu, Mingliang ; Yan, Shaojiu ; Dai, Shenglong

Hang kong cai liao xue bao, 2023-08, Vol.43 (4), p.129-136 [Periódico revisado por pares]

Beijing: Beijing Institute of Aeronautical Materials

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  • Título:
    Preparation of LiCoO2 composite coated with graphene and PEDOT∶PSS with enhanced electrochemical properties at high voltage for lithium-ion batteries
  • Autor: Wang, Jixian ; Peng, Sikan ; Wang, Chen ; Nan, Wenzheng ; Liu, Mingliang ; Yan, Shaojiu ; Dai, Shenglong
  • Assuntos: Charge transfer ; Electrochemical analysis ; electrochemical properties ; Electron microscopes ; Electron microscopy ; Graphene ; licoo2 ; Lithium compounds ; Lithium-ion batteries ; Microscopy ; pss∶pedot ; Rechargeable batteries ; surface coating
  • É parte de: Hang kong cai liao xue bao, 2023-08, Vol.43 (4), p.129-136
  • Descrição: LiCoO2 coated with graphene and PSS:PEDOT（GP-LCO）is synthesized by a facile and scalable method. The structure and morphology of LiCoO2（LCO）and GP-LCO have been investigated by X-ray diffraction（XRD）and scanning electron microscopy（SEM）. Transmission electron microscopy（TEM）further demonstrate the existence of graphene and PSS:PEDOT. The electrochemical properties of the composites are investigated by cyclic voltammetry and AC impedance measurements, which show that the conductive film of graphene（1%）and PSS:PEDOT（2%）on the surface significantly decreases the charge transfer resistance and improves the cycle stability of LiCoO2. Galvanostatic charge-discharge test reveals that with only 2% Super P as conductive additive, the GP-LCO delivers a capacity of 173.9 mAh/g at 0.1 C and 118.0 mAh/g at 10 C, which are higher than the pristine LCO in the potential range of 3.0-4.5 V（vs. Li/Li+）. Moreover, it is clearly noticed that the GP-LCO exhibits a capacity retention of 76.6% after 100 cycles at 0.1C, while the LC
  • Editor: Beijing: Beijing Institute of Aeronautical Materials
  • Idioma: Chinês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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