Pengaruh Penambahan Plasticizer terhadap Konduktivitas Ionik Solid Polymer Electrolyte Berbasis Cellulose Acetate

Novia, Indah Zulfah (2025) Pengaruh Penambahan Plasticizer terhadap Konduktivitas Ionik Solid Polymer Electrolyte Berbasis Cellulose Acetate. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Solid polymer elctrolyte (SPE) menjadi salah satu alternatif pengganti elektrolit cair. SPE berbasis cellulose acetate (CA) merupakan alternatif SPE yang lebih aman, ramah lingkungan, dan bersifat biodegradable. Namun, SPE CA memiliki keterbatasan nilai konduktivitas ionik. Penambahan garam dan plasticizer digunakan untuk meningkatkan konduktivitas ionik. SPE disintesis menggunakan metode solution casting. Berbagai jenis plasticizer yang digunakan yaitu Gliserol, polyethylene glycol (PEG), dan Deep Eutectic Solvent (DES) dari campuran choline chloride/urea. Konsentrasi yang digunakan untuk setiap plasticizer ada tiga, yaitu 40wt%, 50wt%, dan 60wt%. Jenis plasticizer pada SPE CA mempengaruhi nilai konduktivitas ionik yang dilihat dari karakterisasi XRD yang menunjukkan CALa/PEG merupakan sampel paling amorf, FTIR menunjukkan penambahan plasticizer melemahkan ikatan antar rantai paling besar pada sampel CALa/PEG, SEM menunjukkan sampel CALa/PEG memiliki tingkat porositas paling tinggi dan luas permukaan paling besar, dan DSC menunjukkan temperature glass (Tg) dan melting point (Tm) CALa/PEG yang paling rendah dan paling amorf. Hasil uji EIS menujukkan konduktivitas ionik paling tinggi yaitu pada CALa/PEG60% dengan nilai 1,06 × 10⁻⁶ S/cm, CALa/DES60% sebesar 8,23 × 10⁻⁷ S/cm, dan CALa/GLY60% sebesar 6,98 × 10⁻⁷ S/cm. Pengujian EIS pada berbagai temperatur dilakukan untuk mengevaluasi pengaruh suhu terhadap mobilitas ion dan konduktivitas ionik. Semakin kecil energi aktivasi, semakin mudah ion bergerak, dibuktikan dari nilai Ea pada CALa, CALa/GLY60%, CALa/DES60%, dan CALa/PEG60% berurutan adalah sebesar 0,0632 eV; 0,0543 eV; 0,0316 eV; dan 0,0264 eV. PEG terbukti menjadi jenis plasticizer yang paling efektif dalam meningkatkan konduktivitas ionik dan struktur amorf SPE CA.
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Solid Polymer Electrolyte (SPE) is a promising alternative to liquid electrolytes. Cellulose acetate (CA)-based SPE offers a safer, more environmentally friendly, and biodegradable option. However, CA-SPE has limitations in ionic conductivity. The addition of salt and plasticizer is employed to improve its ionic conductivity. The SPE was synthesized using the solution casting method. Various types of plasticizers were used, namely glycerol, polyethylene glycol (PEG), and a Deep Eutectic Solvent (DES) composed of choline chloride/urea. Each plasticizer was used at three concentrations: 40 wt%, 50 wt%, and 60 wt%. The type of plasticizer significantly influences the ionic conductivity of CA-SPE. XRD characterization showed that CALa/PEG is the most amorphous sample. FTIR results indicated that the PEG plasticizer weakens the interchain bonding the most. SEM analysis showed that CALa/PEG has the highest porosity and the largest surface area, while DSC analysis revealed the lowest glass transition (Tg) and melting temperature (Tm), indicating the highest amorphous nature. EIS testing showed that CALa/PEG60% achieved the highest ionic conductivity at 1.06 × 10⁻⁶ S/cm, followed by CALa/DES60% at 8.23 × 10⁻⁷ S/cm and CALa/GLY60% at 6.98 × 10⁻⁷ S/cm. EIS measurements at various temperatures were conducted to evaluate the effect of temperature on ion mobility and ionic conductivity. The lower the activation energy, the easier the ion transport, as demonstrated by the activation energy (Ea) values of CALa, CALa/GLY60%, CALa/DES60%, and CALa/PEG60%, which were 0.0632 eV, 0.0543 eV, 0.0316 eV, and 0.0264 eV, respectively. PEG is proven to be the most effective plasticizer in enhancing the ionic conductivity and amorphous structure of CA-based SPE.
0.0316 eV, and 0.0264 eV, respectively. PEG is proven to be the most effective plasticizer in enhancing the ionic conductivity and amorphous structure of CA-based SPE.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Cellulose Acetate, Garam, Konduktivitas Ionik, Plasticizer, Solid Polymer Electrolyte Cellulose Acetate, Ionic Conductivity, Plasticizer, Salt, Solid Polymer Electrolyte
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ165 Energy storage.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	Indah Zulfah Novia
Date Deposited:	25 Jul 2025 03:51
Last Modified:	25 Jul 2025 03:51
URI:	http://repository.its.ac.id/id/eprint/121242

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