1. Elucidating the relationship between mechanical properties and ionic conductivity in a highly conductive gel polymer electrolyte
- Author
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Xing Zhang, Derrick Wen Hui Fam, Shijia Liu, Yuanhan Zheng, Qi Feng Lim, Mohit Sharma, and Xueqi Koh
- Subjects
Supercapacitor ,chemistry.chemical_classification ,Vinyl alcohol ,Materials science ,Mechanical Engineering ,02 engineering and technology ,Electrolyte ,Polymer ,Dynamic mechanical analysis ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Mechanics of Materials ,Ionic liquid ,Ionic conductivity ,General Materials Science ,0210 nano-technology ,Electrical conductor - Abstract
The storage modulus and ionic conductivity of prototypical gel electrolytes consisting of different amounts of poly (vinyl alcohol) and the ionic liquid 1-ethyl-3-methylimidazolium bis (trifluoromethylsulfonyl) imide (EMI TFSI) were made and characterized. Peak ionic conductivity and room temperature storage modulus of 2.4 × 10−2 S cm−1 and 128 MPa respectively were achieved. The gel electrolytes were also characterized with a multifunctional index. It was found that the optimal ionic conductivity and mechanical properties were obtained with 40 wt% EMI TFSI loading, where an ionic conductivity of 1.2 × 10−3 S cm−1 and a room temperature storage modulus of 30.7 MPa were obtained. A specific capacitance of 29.24 F g−1 was obtained in a test supercapacitor device.
- Published
- 2021
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