Sains Malaysiana 38(4)(2009): 483–487 

Preparation and Characterization of PVC-Al₂O₃-LiClO₄ Composite Polymeric Electrolyte

(Penyediaan dan Pencirian Komposit Polimer Elektrolit PVC- Al₂O₃-LiClO₄)

Azizan Ahmad^1,*, Mohd. Yusri Abdul Rahman²,

Siti Aminah Mohd Noor¹ & Mohd Reduan Abu Bakar¹

¹Pusat Pengajian Sains Kimia dan Teknologi Makanan,

Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia,

43600 Bangi, Selangor D.E., Malaysia

²Mohd. Yusri Abdul Rahman

College of Engineering, Universiti Tenaga Nasional,

43009 Kajang, Selangor D.E., Malaysia

Received: 13 February 2008 / Accepted: 3 November 2008

ABSTRACT

Ionic conductivity of composite polymer electrolyte PVC-Al₂O₃-LiClO₄ as a function of Al₂O₃ concentration has been studied. The electrolyte samples were prepared by solution casting technique. Their ionic conductivity was measured using impedance spectroscopy technique. It was observed that the conductivity of the electrolyte varies with Al₂O₃ concentration. The highest room temperature conductivity of the electrolyte of 3.43 × 10^-10 S.cm^-1 was obtain at 25% by weight of Al₂O₃and that without Al₂O₃ filler was found to be 2.43 × 10^-11 S.cm^-1. The glass transition temperature decreases with the increase of Al₂O₃ percentage due to the increasing amorphous state, meanwhile the degradation temperature increases with the increase of Al₂O₃ percentage. Both of these thermal properties influence the enhancement of the conductivity value. The morphology of the samples shows the even distribution of the Al₂O₃ filler in the samples. However, the filler starts to agglomerate in the sample when high percentage of Al₂O₃ is being used. Inconclusion, the addition of Al₂O₃ filler improves the ionic conductivity of PVC- Al₂O₃-LiCIO₄ solid polymer electrolyte.

Keywords: inorganic filler; ionic conductivity; PVC; surface morphology

ABSTRAK

Kajian kesan kandungan pengisi Al₂O₃ terhadap kekonduksian komposit polimer elektrolit PVC- Al₂O₃-LiClO₄ telah dikaji. Sampel disediakan menggunakan teknik pengacunan larutan. Kekonduksian ion diukur dengan menggunakan spektroskopi impedans. Didapati kekonduksian ion pada suhu bilik yang tertinggi adalah 3.43 × 10^-10 S.cm^-1 pada 25% berat Al₂O₃ berbanding dengan kekonduksian ion tanpa pengisi hanya 2.43 × 10^-11 S.cm^-1. Suhu peralihan kaca sampel menurun dengan meningkatnya peratus kandungan pengisi disebabkan oleh peningkatan fasa amorfus manakala suhu degradasi pula meningkat dengan meningkatnya peratus pengisi. Morfologi sampel menunjukkan pengisi tertabur secara sekata namun demikian ia cenderung membentuk aglomerasi pada peratus pengisi yang tinggi. Kesimpulannya penambahan pengisi Al₂O₃ dapat meningkatkan kekonduksian ion pepejal polimer elektrolit PVC Al₂O₃-LiClO₄.

Kata kunci: kekonduksian ionik; morfologi permukaan; PVC; pengisi tak organik

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*Corresponding author; email: azizan@ukm.my