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Novel flexible Li-doped PEO/copolymer electrolytes for supercapacitor application

  • Banu Karaman
  • Emre Çevik
  • Ayhan BozkurtEmail author
Original Paper
First Online:
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Abstract

In the present work, copolymer of poly(vinyl acetate-co-acrylonitrile), (poly(VAc-co-AN)) was produced and then converted to of poly(vinyl alcohol-co-acylonitrile), (poly(VA-co-CN)) via hydroysis. The polymer electrolytes on the basis of poly (ethylene oxide) (PEO)/poly(vinyl alcohol-co-acrylonitrile) (poly(VA-co-AN)) were produced and they were doped with certain fractions of 1-ethyl-3-methylimidazolium (IL)/lithium tetrafluoroborate (LiBF4). The production of a copolymer was justified by 1H-NMR and the structure of blend polymer electrolytes elucidated with Fourier-transform infrared spectroscopy (FT-IR) spectroscopy. Thermal measurements showed that all the electrolytes are almost stable up to 200 °C. Differential scanning calorimetry (DSC) results demonstrated the semicrystalline character of the electrolytes. The surface morphology was studied by scanning electron microscopy (SEM) confirmed the homogeneity of the electrolytes. The ionic conductivity was systematically studied with respect to temperature as well as the content of the polymer electrolytes. In dry state, poly(VA-co-AN) (PEO-20%IL-20/1LiBF4), S5 exhibited a conductivity of 2 × 10−4 S/cm at RT and 7 × 10−3 S/cm at 100 °C. Galvanostatic charge/discharge graph indicated good electrochemical reversibility up to 1000 cycle with almost no loss in coulombic efficiency. A symmetrical cell comprising poly(VA-co-AN)/IL, S5 sample yielded a specific capacitance of 80 F g−1 at 1 A/g. The same electrolyte yielded a maximum energy density in supercapacitor as 61 Wh kg−1 at a power density of 500 W kg−1.

Keywords

Solid polymer electrolytes Supercapacitors Copolymer Polymer Blend Cyclic voltammetry 
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Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflicts of interest.

Supplementary material

11581_2019_2854_MOESM1_ESM.docx (290 kb)
ESM 1 (DOCX 289 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Bio & Nano Technology EngineeringIstanbul UniversityIstanbulTurkey
  2. 2.Department of Genetic Research, Institute for Research and Medical Consultations (IRMC)Imam Abdulrahman Bin Faisal UniversityDammamSaudi Arabia
  3. 3.Department of Physics, Institute for Research and Medical Consultations (IRMC)Imam Abdulrahman Bin Faisal UniversityDammamSaudi Arabia

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