Citation

Sun, Cha Chee and You, Ah Heng and Teo, Lay Lian (2021) Cyclic Voltammetry Characterization for PAN Polymer Electrolyte With Al2O3 Fillers. In: 2nd FET PG Engineering Colloquium Proceedings 2021, 1-15 Dec. 2021, Online Conference. (Unpublished)

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Abstract

Polyacrylonitrile (PAN) host polymer is an attractive material due to its inherent properties such as high ionic conductivity, stable thermal characteristics, good contact with lithium electrodes and suppress dendrite growth during charging and discharging process. Hence, PAN has emerged as an interesting candidate in realizing lithium ion batteries with high performance expectation. This work performs cyclic voltammetry (CV) characterization for PAN composite polymer electrolytes with 10 µm and 50 nm Al2O3 filler sizes. Charge capacity for polymer electrolytes at each filler size are also determined. PAN polymer, trifluoromethansulfonate (LiCF3SO3) lithium salt, ethylene carbonate (EC) plasticizer and aluminium dioxide (Al2O3) fillers are used as obtain from Sigma Aldrich. All materials are weighted according to the required amount. A small amount of dimethylformamide (DMF) solvent is added into the powder mixture and send to stir at constant speed in room temperature for 24 hours until clear and slurry solution is obtained. The solution is casted onto petri dish to allow for drying in fume hood at room temperature for 5 days. In order to ensure no solvent residue is trapped in the film, further drying in oven at 60 °C for 5 hours is performed. Polymer electrolyte film is trimmed into the required size and sandwiched between two metal electrodes for CV characterization. The samples are tested from 0 V to 3V at 20 mVs-1 for 5 cycles. The results for both filler sizes show that every subsequent cycle resemble closely to the previous cycle. This proven that charging and discharging cycle is well reversible for both polymer electrolytes. Further more, there’s no oxidation peak exist in the curves, showing that both polymer electrolytes hold a superb electrochemical stability across the tested voltage range. Charge capacity is then determined by integrating the electrochemical window in CV curve. Polymer electrolytes with 10 µm and 50nm Al2O3 filler size has 10.16 mC and 24.52 mC respectively. Hence, nano size filler is capable to store more charges as compared to micro size filler counterpart. This result supported the ionic conductivity results reported in previous work.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	PAN, Al2O3, polymer electrolytes, cyclic voltammetry, charge capacity
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Divisions:	Faculty of Engineering and Technology (FET)
Depositing User:	Ms Nurul Iqtiani Ahmad
Date Deposited:	26 Jan 2022 04:14
Last Modified:	26 Jan 2022 04:14
URII:	http://shdl.mmu.edu.my/id/eprint/9913

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