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Electrochemical performance and stability of a PPy/MMT-PVDF/PMMA composite film at high temperature

Journal Article


Abstract


  • A polypyrrole/montmorillonite-polyvinylidenedifluoride/polymethyl methacrylate (PPy/MMT-PVDF/PMMA) composite film was prepared by a solvent casting technique. The surface morphology and cross-sectional structure of the 12 wt.% PPy/MMT-PVDF/PMMA composite film exhibited porosity with high specific surface area and good adsorption capacity. The 12 wt.% PPy/MMT-PVDF/PMMA composite film shows good electrolyte uptake (241%) and electrochemical stability. The ionic conductivity of the 12 wt.% PPy/MMT-PVDF/PMMA composite film with LiPF 6 organic electrolyte reaches 2.45 × 10 −3 S cm −1 at 20 °C. The Li/LiNi 1/3 Co 1/3 Mn 1/3 O 2 cell assembled with the 12 wt.% PPy/MMT-PVDF/PMMA composite film and LiPF 6 organic electrolyte exhibits good capacity retention and cycling performance at 1 C and 60 °C. At the same time, the nucleophilic substitution reacts with the PPy/MMT-PVDF/PMMA composite film and HF from hydrolysis by trace moisture of LiPF 6 in the electrolyte solution, which can inhibit the disproportionation of Mn 3+ in the LiNi 1/3 Co 1/3 Mn 1/3 O 2 electrode material and decrease the internal resistance of the cell at high temperature. In conclusion, the PPy/MMT-PVDF/PMMA composite film can be employed in Li-ion batteries.

UOW Authors


  •   Yang, Shuo (external author)
  •   Li, Xuan (external author)
  •   Li, Hui Jun.
  •   Yao, Pei (external author)

Publication Date


  • 2018

Citation


  • Yang, S., Li, X., Li, H. & Yao, P. (2018). Electrochemical performance and stability of a PPy/MMT-PVDF/PMMA composite film at high temperature. Synthetic Metals, 242 83-91.

Scopus Eid


  • 2-s2.0-85047097413

Number Of Pages


  • 8

Start Page


  • 83

End Page


  • 91

Volume


  • 242

Place Of Publication


  • Switzerland

Abstract


  • A polypyrrole/montmorillonite-polyvinylidenedifluoride/polymethyl methacrylate (PPy/MMT-PVDF/PMMA) composite film was prepared by a solvent casting technique. The surface morphology and cross-sectional structure of the 12 wt.% PPy/MMT-PVDF/PMMA composite film exhibited porosity with high specific surface area and good adsorption capacity. The 12 wt.% PPy/MMT-PVDF/PMMA composite film shows good electrolyte uptake (241%) and electrochemical stability. The ionic conductivity of the 12 wt.% PPy/MMT-PVDF/PMMA composite film with LiPF 6 organic electrolyte reaches 2.45 × 10 −3 S cm −1 at 20 °C. The Li/LiNi 1/3 Co 1/3 Mn 1/3 O 2 cell assembled with the 12 wt.% PPy/MMT-PVDF/PMMA composite film and LiPF 6 organic electrolyte exhibits good capacity retention and cycling performance at 1 C and 60 °C. At the same time, the nucleophilic substitution reacts with the PPy/MMT-PVDF/PMMA composite film and HF from hydrolysis by trace moisture of LiPF 6 in the electrolyte solution, which can inhibit the disproportionation of Mn 3+ in the LiNi 1/3 Co 1/3 Mn 1/3 O 2 electrode material and decrease the internal resistance of the cell at high temperature. In conclusion, the PPy/MMT-PVDF/PMMA composite film can be employed in Li-ion batteries.

UOW Authors


  •   Yang, Shuo (external author)
  •   Li, Xuan (external author)
  •   Li, Hui Jun.
  •   Yao, Pei (external author)

Publication Date


  • 2018

Citation


  • Yang, S., Li, X., Li, H. & Yao, P. (2018). Electrochemical performance and stability of a PPy/MMT-PVDF/PMMA composite film at high temperature. Synthetic Metals, 242 83-91.

Scopus Eid


  • 2-s2.0-85047097413

Number Of Pages


  • 8

Start Page


  • 83

End Page


  • 91

Volume


  • 242

Place Of Publication


  • Switzerland