Design of a novel redox-active gel polymer electrolyte with a dual-role ionic liquid for flexible supercapacitors

Tu, Qiu-Mei; Fan, Leqing; Pan, Fei; Huang, Jing‐Mei; Gu, Yun; Lin, Jianming; Huang, Miaoliang; Huang, Yunfang; Wu, Jihuai

doi:10.1016/j.electacta.2018.02.008

Cited by 101 publications

(56 citation statements)

References 47 publications

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“…Nyquist plots of SSC-X (SSCs with different GPEs) in the frequency range of 0.01 Hz-100 kHz was shown in Figure 6. The intercept with real axis (Z’ axis) in the high frequency region (Z” = 0) reflects equivalent series resistance ( R s ) of SSC cells, which is associated with the ionic resistance of the electrolyte, the intrinsic resistance of the electrode material and the contact resistance at the interface of electrode material [47,48,49]. An approximate semicircular behavior at the high to medium frequency region refers to the interfacial charge transfer resistance ( R ct ), which is related to the process at the electrolyte/electrode interface [50].…”

Section: Resultsmentioning

confidence: 99%

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

Xun

Gao

et al. 2019

Polymers

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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.

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Section: Resultsmentioning

confidence: 99%

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

Xun

Gao

et al. 2019

Polymers

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“…To study the structure and specific surface area of the nanowires of the electrode material in depth, physical adsorption of nitrogen was used [ 30 ]. Figure 3 shows the N 2 adsorption–desorption curves and pore size distributions of the prepared samples.…”

Section: Resultsmentioning

confidence: 99%

Hydrothermal Synthesis of Co-Doped NiSe2 Nanowire for High-Performance Asymmetric Supercapacitors

Fan

Huang

et al. 2018

Materials

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Co@NiSe2 electrode materials were synthesized via a simple hydrothermal method by using nickel foam in situ as the backbone and subsequently characterized by scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, and a specific surface area analyzer. Results show that the Co@NiSe2 electrode exhibits a nanowire structure and grows uniformly on the nickel foam base. These features make the electrode show a relatively high specific surface area and electrical conductivity, and thus exhibit excellent electrochemical performance. The obtained electrode has a high specific capacitance of 3167.6 F·g−1 at a current density of 1 A·g−1. To enlarge the potential window and increase the energy density, an asymmetric supercapacitor was assembled by using a Co@NiSe2 electrode and activated carbon acting as positive and negative electrodes, respectively. The prepared asymmetrical supercapacitor functions stably under the potential window of 0–1.6 V. The asymmetric supercapacitor can deliver a high energy density of 50.0 Wh·kg−1 at a power density of 779.0 W·kg−1. Moreover, the prepared asymmetric supercapacitor exhibits a good rate performance and cycle stability.

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“…Recently, a novel redox-mediated strategy for SCs was reported, which can efficiently increase the ionic conductivity and produce additional capacitance by the quick reversible redox reaction introduced by the redox mediator (Alipoori et al, 2020). The redox additives in gel polymer electrolytes usually include indigo carmine (IC) (Ma et al, 2015), 2-mercaptopyridine (PySH) (Pan et al, 2015), 1-butyl-3-methylimidazolium iodide (BMIMI) (Tu et al, 2018), alizarin red S (ARS) (Sun et al, 2016), FeBr 3 (Wang et al, 2019), 1,4 Naphthoquinone (Hashemi et al, 2018), 1-anthraquinone sulfonic acid sodium (AQQS) (Feng et al, 2016) and 1-ethyl-3methylimidazolium tetrafluoroborate ([EMIM]BF 4 ) (Seok Jang et al, 2016).…”

Section: Redox Mediated Gel Electrolytesmentioning

confidence: 99%

“…So, many pieces of research have focused on this problem recently. Fan et al (2020) lowered self-discharge and improved energy density and cycling stability (capacitance (Mai et al, 2013;Park et al, 2014;Yu et al, 2014;Díaz et al, 2015;Sathyamoorthi et al, 2015;Zhang et al, 2015;Kim et al, 2016;Navalpotro et al, 2016;Seok Jang et al, 2016;Singh and Chandra, 2016;Xie H. J. et al, 2016;Mousavi et al, 2017;Ren et al, 2017;Gao et al, 2018;Tu et al, 2018;Wang et al, 2019).…”

Section: Redox Mediated Gel Electrolytesmentioning

confidence: 99%

A Review of Redox Electrolytes for Supercapacitors

et al. 2020

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Supercapacitors (SCs) have attracted widespread attention due to their short charging/discharging time, long cycle life, and good temperature characteristics. Electrolytes have been considered as a key factor affecting the performance of SCs. They largely determine the energy density based on their decomposition voltage and the power density from their ionic conductivity. In recent years, redox electrolytes obtained a growing interest due to an additional redox activity from electrolytes, which offers an increased charge storage capacity in SCs. This article summarizes the latest progress in the research of redox electrolytes, and focuses on their properties, mechanisms, and applications based on different solvent types available. It also proposes potential solutions for how to effectively increase the energy density of the SCs while maintaining their high power and long life.

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Design of a novel redox-active gel polymer electrolyte with a dual-role ionic liquid for flexible supercapacitors

Cited by 101 publications

References 47 publications

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

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

Hydrothermal Synthesis of Co-Doped NiSe2 Nanowire for High-Performance Asymmetric Supercapacitors

A Review of Redox Electrolytes for Supercapacitors

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