Studies on the ions transportation behavior of alginate doped with H+ carrier-based polymer electrolytes

A. F. Fuzlin, N. F. Mazuki, N. M. Khan, M. A. Saadiah, Md M. Hasan, Y. Nagao, A. S. Samsudin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In the present work, amorphous bio-based polymer electrolytes (BBPEs) using alginate polymer as a matrix host and doped with varying amounts of ammonium iodide (NH4I) have been developed via the solution casting technique. The physicochemical properties of alginate-NH4I BBPEs were evaluated by using X-Ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared (FTIR), thermal gravimetric analysis (TGA), electrical impedance spectroscopy (EIS), and transference number measurement (TNM). The BBPEs film containing 25 wt % of NH4I possessed the highest ionic conductivity of 1.29 × 10−4 S cm−1, the highest amorphous phase, and good thermal stability of up to 234 °C. Based on the Nyquist fitting approaches, the ionic conductivity of the BBPEs was primarily influenced by the ion transportation, which was due to the interplay of segmental motion between the alginate and NH4I, and also the H+ hopping mechanism, as shown by FTIR. The proton transference number (tH+ = 0.41) suggests that alginate BBPEs are promising materials in electrochemical device applications.

Original languageEnglish
Article number126207
JournalMaterials Chemistry and Physics
Volume287
DOIs
Publication statusPublished - 2022 Aug 1
Externally publishedYes

Keywords

  • Amorphous polymer electrolyte
  • Ionic conductivity
  • Proton (H)
  • Thermal stability
  • alginate

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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