scholarly journals Construction of Polymer Electrolyte Based on Soybean Protein Isolate and Hydroxyethyl Cellulose for a Flexible Solid-State Supercapacitor

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1895 ◽  
Author(s):  
Xun ◽  
Ni ◽  
Gao ◽  
Zhang ◽  
Gu ◽  
...  
Keyword(s):  
Solid State ◽  
Electrochemical Performance ◽  
Polymer Electrolyte ◽  
Soybean Protein ◽  
Coulombic Efficiency ◽  
Gel Polymer Electrolyte ◽  
Protein Isolate ◽  
Hydroxyethyl Cellulose ◽  
Soybean Protein Isolate ◽  
Energy Devices

Supercapacitors are a very active research topic. However, liquid electrolytes present several drawbacks on security and packaging. Herein, a gel polymer electrolyte was prepared based on crosslinked renewable and environmentally friendly soybean protein isolate (SPI) and hydroxyethyl cellulose (HEC) with 1.0 mol L−1 Li2SO4. Highly hydrophilic SPI and HEC guaranteed a high ionic conductivity of 8.40 × 10−3 S cm−1. The fabricated solid-state supercapacitor with prepared gel polymer electrolyte exhibited a good electrochemical performance, that is, a high single electrode gravimetric capacitance of 91.79 F g−1 and an energy density of 7.17 W h kg−1 at a current density of 5.0 A g−1. The fabricated supercapacitor exhibited a flexible performance under bending condition superior to liquid supercapacitor and similar electrochemical performance at various bending angles. In addition, it was proved by an almost 100% cycling retention and a coulombic efficiency over 5000 charge–discharge cycles. For comparison, supercapacitors assembled with commercial aqueous PP/PE separator, pure SPI membrane, and crosslinked SPI membrane were also characterized. The obtained gel polymer electrolyte based on crosslinked SPI and HEC may be useful for the design of advanced polymer electrolytes for energy devices.

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

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 863 ◽  
Author(s):  
Pengfei Huo ◽  
Shoupeng Ni ◽  
Pu Hou ◽  
Zhiyu Xun ◽  
Yang Liu ◽  
...  
Keyword(s):  
Solid State ◽  
Polymer Electrolyte ◽  
Polymer Electrolytes ◽  
Soybean Protein ◽  
Gel Polymer Electrolyte ◽  
High Energy ◽  
Protein Isolate ◽  
High Energy Density ◽  
Gel Polymer Electrolytes ◽  
Soybean Protein Isolate

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.

scholarly journals Poly(3,4-ethylenedioxythiophene) Based Solid-State Polymer Supercapacitor with Ionic Liquid Gel Polymer Electrolyte

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 297 ◽  
Author(s):  
Haiyan Du ◽  
Zemin Wu ◽  
Yuyu Xu ◽  
Shaoze Liu ◽  
Huimin Yang
Keyword(s):  
Ionic Liquid ◽  
Solid State ◽  
Electrochemical Performance ◽  
Polymer Electrolyte ◽  
Electrochemical Impedance ◽  
Elastic Recovery ◽  
Gel Polymer Electrolyte ◽  
Carbon Paper ◽  
Self Healing ◽  
Potential Applications

In this work, solid-state polymer supercapacitor (SSC) was assembled using poly(3,4-ethylenedioxythiophene/carbon paper (PEDOT/CP) as an electrode and ionic liquid (1-butyl-3-methylimidazole tetrafluoroborate)/polyvinyl alcohol/sulfuric acid (IL/PVA/H2SO4) as a gel polymer electrolyte (GPE). The GPE was treated through freezing–thawing (F/T) cycles to improve the electrochemical properties of PEDOT SSC. Cyclic voltammetry (CV), galvanostatic charge–discharge measurements (GCD) and electrochemical impedance spectroscopy (EIS) techniques and conductivity were carried out to study the electrochemical performance. The results showed that the SSC based on ionic liquid GPE (SSC-IL/PVA/H2SO4) has a higher specific capacitance (with the value of 86.81 F/g at 1 mA/cm2) than the SSC-PVA/H2SO4.The number of F/T cycles has a great effect on the electrochemical performance of the device. The energy density of the SSC treated with 3 F/T cycles was significantly improved, reaching 176.90 Wh/kg. Compared with the traditional electrolytes, IL GPE has the advantages of high ionic conductivity, less volatility, non-flammability and wider potential window. Moreover, the IL GPE has excellent elastic recovery and self-healing performance, leading to its great potential applications in flexible or smart energy storage equipment.

Enhancing the electrochemical performance of a flexible solid-state supercapacitor using a gel polymer electrolyte

2021 ◽  
Vol 26 ◽  
pp. 102102
Author(s):  
Haylay Ghidey Redda ◽  
Yosef Nikodimos ◽  
Wei-Nien Su ◽  
Ruei-San Chen ◽  
Shi-Kai Jiang ◽  
...  
Keyword(s):  
Solid State ◽  
Electrochemical Performance ◽  
Polymer Electrolyte ◽  
Gel Polymer Electrolyte

scholarly journals Optimization of High Hydrostatic Pressure Treatments on Soybean Protein Isolate to Improve Its Functionality and Evaluation of Its Application in Yogurt

Foods ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 667
Author(s):  
Chenxiao Wang ◽  
Hao Yin ◽  
Yanyun Zhao ◽  
Yan Zheng ◽  
Xuebing Xu ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
High Hydrostatic Pressure ◽  
Activity Index ◽  
Soybean Protein ◽  
Protein Isolate ◽  
Water Holding Capacity ◽  
Holding Time ◽  
Emulsifying Activity ◽  
Soybean Protein Isolate ◽  
Water Holding

This work aimed to improve the functional properties of soybean protein isolate (SPI) by high hydrostatic pressure (HHP) and develop SPI incorporated yogurt. Response surface methodology (RSM) was used to optimize the HHP treatment parameters, including pressure, holding time, and the ratio of SPI/water. Water holding capacity, emulsifying activity index, solubility, and hardness of SPI gels were evaluated as response variables. The optimized HPP treatment conditions were 281 MPa of pressure, 18.92 min of holding time, and 1:8.33 of SPI/water ratio. Water and oil holding capacity, emulsifying activity, and stability of SPI at different pH were improved. Additionally, relative lipoxygenase (LOX) activity of HHP treated SPI (HHP-SPI) was decreased 67.55 ± 5.73%, but sulphydryl group content of HHP-SPI was increased 12.77%, respectively. When incorporating 8% of SPI and HHP-SPI into yogurt, the water holding capacity and rheological properties of yogurt were improved in comparison with yogurt made of milk powders. Moreover, HHP-SPI incorporated yogurt appeared better color and flavor.

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