Bio-inspired redox mediated electrolyte for high performance flexible supercapacitor applications over broad temperature domain

Çevik, Emre; Günday, Şeyda Tuğba; Bozkurt, Ayhan; Amine, Rachid; Amine, Khalil

doi:10.1016/j.jpowsour.2020.228544

Cited by 49 publications

(19 citation statements)

References 45 publications

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“…An electrical double-layer capacitor (EDLC) is a supercapacitor device (SCDs), which is characterized by the simplicity of fabrication and it has been widely studied [ 21 , 22 ]. Moreover, the increasing demand for wearable electronics and flexible EDLC further encouraged research groups to modify various components of the device [ 23 , 24 ]. Among different components of the device, a particular attention is given to the electrolyte of the EDLC.…”

Section: Introductionmentioning

confidence: 99%

“…Among different components of the device, a particular attention is given to the electrolyte of the EDLC. Many studies have shown that polymer based electrolyte can be considered a suitable candidate for the fabrication of flexible EDLC with good performance under bending, twisting and folding conditions [ 24 , 25 , 26 , 27 ]. Regarding electrode fabrication to be utilized in EDLCs, various carbon allotropies with relatively high surface areas (porous materials) and enough electrical conductivity can be used.…”

Section: Introductionmentioning

confidence: 99%

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Plasticized Sodium-Ion Conducting PVA Based Polymer Electrolyte for Electrochemical Energy Storage—EEC Modeling, Transport Properties, and Charge-Discharge Characteristics

et al. 2021

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This report presents the preparation of plasticized sodium ion-conducting polymer electrolytes based on polyvinyl alcohol (PVA)via solution cast technique. The prepared plasticized polymer electrolytes were utilized in the device fabrication of electrical double-layer capacitors (EDLCs). On an assembly EDLC system, cyclic voltammetry (CV), electrical impedance spectroscopy (EIS), linear sweep voltammetry (LSV), transfer number measurement (TNM) and charge–discharging responses were performed. The influence of plasticization on polymer electrolytes was investigated in terms of electrochemical properties applying EIS and TNM. The EIS was fitted with electrical equivalent circuit (EEC) models and ion transport parameters were estimated with the highest conductivity of 1.17 × 10−3 S cm−1 was recorded. The CV and charge-discharging responses were used to evaluate the capacitance and the equivalent series resistance (ESR), respectively. The ESR of the highest conductive sample was found to be 91.2 at the first cycle, with the decomposition voltage of 2.12 V. The TNM measurement has shown the dominancy of ions with tion = 0.982 for the highest conducting sample. The absence of redox peaks was proved via CV, indicating the charge storing process that comprised ion accumulation at the interfacial region. The fabricated EDLC device is stable for up to 400 cycles. At the first cycle, a high specific capacitance of 169 F/g, an energy density of 19 Wh/kg, and a power density of 600 W/kg were obtained.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Plasticized Sodium-Ion Conducting PVA Based Polymer Electrolyte for Electrochemical Energy Storage—EEC Modeling, Transport Properties, and Charge-Discharge Characteristics

et al. 2021

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“…Carbon coated electrodes were placed symmetrically into the split cell using a paper-based separator. [43] All electrochemical tests were performed with identically assembled devices.…”

Section: Resultsmentioning

confidence: 99%

“…Aluminum foil is used for the current collector coated with carbon consisting of AC+CC+PVDF at different ratios. Carbon coated electrodes were placed symmetrically into the split cell using a paper‐based separator [43] . All electrochemical tests were performed with identically assembled devices.…”

Section: Resultsmentioning

confidence: 99%

Highly Flexible and Tailorable Cobalt‐Doped Cross‐Linked Polyacrylamide‐Based Electrolytes for Use in High‐Performance Supercapacitors

Günday

Qahtan

Çevik

et al. 2021

Chemistry An Asian Journal

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A novel hydrogel polymer electrolyte was prepared by incorporation of 1,4-butanediol diglycidyl ether (BG) to cross-linked polyacrylamide (PAM). The electrolyte (PAMBG) was modified with cobalt (II) sulfate with various doping ratios (PAMBGCoX) to increase the capacitance by increasing faradaic reactions. The supercapacitor device assembly was performed by using active carbon (AC) electrodes and hydrogel polymer electrolytes. The specific capacitance of the PAMBGCo5 device indicated 130 F g À 1 , which is at least a seven-fold improvement due to the insertion of Co as a redox component. The electrolyte device, PAMBGCo5, displays superior performance having an energy density of 38 Wh kg À 1 at a power density of 500 W kg À 1 . Additionally, with the same hydrogel, the device performed 10,000 galvanostatic chargedischarge cycles via retaining 91% of the initial capacitance. A cost-effective electrolyte, PAMBGCo5, was tested in a carbon-based supercapacitor under bent and twisted conditions at various angles, confirming the robustness of the device.

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“…In this context, polymer electrolytes attract considerable attention in recent years due to better structural stability, flexibility and conductivity. Thereby, engineering WIS electrolytes into polymer matrix not only extend potential window but also avoid leakage, thus proposing a new direction for exploring SCs with high energy density and high safety [11,12].…”

Section: Introductionmentioning

confidence: 99%

Microzone-explosion synthesis of porous carbon electrodes for advanced aqueous solid-state supercapacitors with a high-voltage gel electrolyte

Liu

Cui

et al. 2021

Journal of Energy Chemistry

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Bio-inspired redox mediated electrolyte for high performance flexible supercapacitor applications over broad temperature domain

Cited by 49 publications

References 45 publications

Plasticized Sodium-Ion Conducting PVA Based Polymer Electrolyte for Electrochemical Energy Storage—EEC Modeling, Transport Properties, and Charge-Discharge Characteristics

Plasticized Sodium-Ion Conducting PVA Based Polymer Electrolyte for Electrochemical Energy Storage—EEC Modeling, Transport Properties, and Charge-Discharge Characteristics

Highly Flexible and Tailorable Cobalt‐Doped Cross‐Linked Polyacrylamide‐Based Electrolytes for Use in High‐Performance Supercapacitors

Microzone-explosion synthesis of porous carbon electrodes for advanced aqueous solid-state supercapacitors with a high-voltage gel electrolyte

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