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A Crosslinked Soybean Protein Isolate Gel Polymer Electrolyte Based on Neutral Aqueous Electrolyte for a High-Energy-Density Supercapacitor

1,2, 1,2, 1,2, 1,2, 1,2 and 1,2,*
1
Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China
2
Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(5), 863; https://doi.org/10.3390/polym11050863
Received: 14 March 2019 / Revised: 8 April 2019 / Accepted: 29 April 2019 / Published: 13 May 2019
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PDF [5103 KB, uploaded 13 May 2019]
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Abstract

A crosslinked membrane based on renewable, degradable and environmentally friendly soybean protein isolate was formed by solution casting method. A series of gel polymer electrolytes were prepared with the crosslinked membranes saturated with 1 mol·L−1 Li2SO4. The solid-state electric double-layer capacitors were fabricated with the prepared gel polymer electrolytes and activated carbon electrodes. The optimized solid-state supercapacitor delivered a single electrode specific capacitance of 115.17 F·g−1 at a current density of 1.0 A·g−1, which was higher than the supercapacitor assembled with the commercial separator in 1 mol·L−1 Li2SO4. The solid-state supercapacitor exhibited an outstanding cycling stability, indicating that the gel polymer electrolyte based on the crosslinked soybean protein isolate membrane could be a promising separator for a solid-state supercapacitor. View Full-Text
Keywords: soybean protein isolate; gel polymer electrolyte; crosslinked membranes; solid-state supercapacitor soybean protein isolate; gel polymer electrolyte; crosslinked membranes; solid-state supercapacitor
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Huo, P.; Ni, S.; Hou, P.; Xun, Z.; Liu, Y.; Gu, J. A Crosslinked Soybean Protein Isolate Gel Polymer Electrolyte Based on Neutral Aqueous Electrolyte for a High-Energy-Density Supercapacitor. Polymers 2019, 11, 863.

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