Malaysian Journal of Analytical Sciences Vol 22 No 2 (2018): 238 - 248

ION-CONDUCTING POLYMER ELECTROLYTE FILMS BASED ON POLY (SODIUM 4-STYRENESULFONATE) COMPLEXED WITH AMMONIUM NITRATE: STUDIES BASED ON MORPHOLOGY, STRUCTURAL AND ELECTRICAL SPECTROSCOPY

(Filem Elektrolit Polimer Pengaliran Ion Berasaskan Kompleks Poli(sodium 4-stirenasulfonat) dengan Amonium Nitrat: Kajian ke atas Morfologi, Struktur dan Spektroskopi Elektrik)

Mohd Faiz Hassan*, Siti Khalijah Zainuddin, Khadijah Hilmun Kamarudin, Chan Kok Sheng,

Mohd Aidil Adha Abdullah

School of Fundamental Sciences

Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia

*Corresponding author: mfhassan@umt.edu.my

Received: 10 July 2017; Accepted: 12 March 2018

Abstract

Solid polymer electrolytes of poly(sodium 4-styrenesulfonate) as a polymer host and ammonium nitrate as an ionic dopant were prepared using a single-solvent via solution casting technique. According to the X-ray diffractogram and Fourier transmission infrared analyses, the solid electrolyte films were in an amorphous state and the coexistence of interaction between cation NH₄⁺ and the polymer structure agrees that the complex film was successfully prepared. The scanning electron microscope observations revealed that the films appeared to be rough, flat, and irregularly shaped surface. The highest ionic conductivity (σ) of 3.16×10^-4 Scm^-1 was achieved at room temperature (303K) for the sample containing 30 wt.% ammonium nitrate.

Keywords: solution cast technique, solid polymer electrolyte, complexation, ionic conductivity

Abstrak

Elektrolit polimer pepejal poli(sodium 4-stirenasulfonat) sebagai polimer perumah dan ammonium nitrat sebagai dopan ionik telah dihasilkan menggunakan pelarut tunggal melalui teknik tuangan larutan. Merujuk kepada analisa difraktogram sinar-X dan inframerah transformasi Fourier, filem-filem elektrolit pepejal dihasilkan dalam keadaan amorfus dan pengkompleksan di antara kation NH⁴⁺ dan struktur polimer mengesahkan filem tersebut berjaya dihasilkan. Pemerhatian mikroskopi elektron imbasan mendedahkan filem-filem tersebut mempunyai permukaan yang kasar, rata dan wujudnya bentuk-bentuk yang tidak seragam pada permukaannya. Nilai tertinggi konduktiviti ionik (σ) of 3.16×10^-4 Scm^-1 telah diperolehi pada suhu bilik (303K) bagi sampel yang mengandungi 30 wt.% ammonium nitrat.

Kata kunci: teknik tuangan larutan, elektrolit polimer pepejal, pengkompleksan, konduktiviti ionik

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