Hexanoyl chitosan/ENR25 blend polymer electrolyte system for electrical double layer capacitor
Corresponding Author
Tan Winie
Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Malaysia
Institute of Science, Universiti Teknologi MARA, Shah Alam, Malaysia
Correspondence
Tan Winie, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia.
Email: [email protected]
Search for more papers by this authorAsheila Jamal
Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Malaysia
Search for more papers by this authorFarish Irfal Saaid
Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Malaysia
Search for more papers by this authorTseung-Yuen Tseng
Department of Electronics Engineering and Institute of Electronics, National Chiao-Tung University, Hsinchu, Taiwan, ROC
Search for more papers by this authorCorresponding Author
Tan Winie
Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Malaysia
Institute of Science, Universiti Teknologi MARA, Shah Alam, Malaysia
Correspondence
Tan Winie, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia.
Email: [email protected]
Search for more papers by this authorAsheila Jamal
Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Malaysia
Search for more papers by this authorFarish Irfal Saaid
Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Malaysia
Search for more papers by this authorTseung-Yuen Tseng
Department of Electronics Engineering and Institute of Electronics, National Chiao-Tung University, Hsinchu, Taiwan, ROC
Search for more papers by this authorAbstract
Single salt polymer electrolytes based on hexanoyl chitosan-ENR25 were prepared by employing LiN (CF3SO2)2 or LiCF3SO3 as the doping salt. Elastic property of hexanoyl chitosan was enhanced with the incorporation of ENR25. DSC studies revealed immiscibility of hexanoyl chitosan and ENR25, and dissolution of salt was favored in ENR25 phase. Conductivity enhancement was observed in the blends as compared with the neat hexanoyl chitosan. The maximum conductivities achieved for LiCF3SO3- and LiN (CF3SO2)2-comprising electrolyte systems were 1.6 × 10−8 and 5.0 × 10−7 S cm−1, respectively. Deconvolution of spectra bands in the vas (SO2−) mode of LiN (CF3SO2)2 and vs (SO3−) mode of LiCF3SO3 has been carried out to estimate the relative percentage of free ions and associated ions. The findings were in good agreement with conductivity results. Electrical double layer capacitor (EDLC) was fabricated with hexanoyl chitosan/ENR25 (90:10)-LiN (CF3SO2)2-EmImTFSI electrolyte and activated carbon-based electrodes. The conductivity and electrochemical stability window of hexanoyl chitosan/ENR25-LiN (CF3SO2)2-EmImTFSI were ~10−6 S cm−1 and 2.7 V, respectively. The performance of the EDLC was analyzed by cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD). From GCD, the specific capacitance of EDLC was 58.0 F g−1 at 0.6 mA cm−2. The specific capacitance was found to decrease with increasing current density.
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