Molybdate incorporated poly(acrylic acid) electrolytes for use in quasi-solid state carbon based supercapacitors: Redox-active polychelates

Shar, Sahar Saad; Çevik, Emre; Bozkurt, Ayhan; Yaman, Cevat; Almutari, Zeyad; Kayed, Tarek S.

doi:10.1016/j.electacta.2020.136770

Cited by 36 publications

(15 citation statements)

References 41 publications

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“…The specific energy (E) and power densities (P) of the prepared ACSCs were obtained from GCD profiles recorded at a current density of 2 A g À 1 using the expressions E = 1/2CsV 2 /3.6 (Wh kg À 1 ) and P = V 2 /(4Res*m). [49] Res were estimated from the voltage drop (IR drop) at the beginning of the discharge curve using the equation [5]: Res = V drop /2I, where V drop and I are the change in the GCD measurement. A significant enhancement in both E and P was obtained by the addition of Co from (8.3 Wh kg À 1 ) and (450 W kg À 1 ) for PAMBG to (130 Wh kg À 1 ) and (500 W kg À 1 ) for PAMBGCo5, respectively (Figure 6b).…”

Section: Resultsmentioning

confidence: 99%

“…The specific capacitance ( Cs ) of the prepared AC electrodes used to test HPE, and redox‐active HPEs was calculated according to this equation[4]: Cs =4× C/m , where C is the capacitance of the ACSCs from GCD profiles at the current density of 0.3 A g −1 and m is mass of AC on both electrodes in g. Cs was improved by the addition of Co into HPEs from 20 F g −1 using PAMBG to 130 F g −1 using PAMBGCo5 (Figure 6a). The specific energy ( E ) and power densities ( P ) of the prepared ACSCs were obtained from GCD profiles recorded at a current density of 2 A g −1 using the expressions E =1/2 CsV 2 /3.6 (Wh kg −1 ) and P = V 2 /(4 Res * m ) [49] . Res were estimated from the voltage drop (IR drop) at the beginning of the discharge curve using the equation [5]: Res = V drop /2 I , where V drop and I are the change in the GCD measurement.…”

Section: Resultsmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

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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“…The specific capacitances (C s,cell , F.g À1 ) of the fabricated symmetrical supercapacitors are computed from CV as well as GCD data by determining the corresponding parameters using the following equation (1) and (2), respectively. 29,30 C s,cell ¼…”

Section: Supercapacitor Fabrication and Characterizationmentioning

confidence: 99%

Investigation of hard/soft CoFe ₂ O ₄ / NiSc ₀ _. ₀₃ Fe ₁ _. ₉₇ O ₄ <

et al. 2021

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The hard/soft CoFe 2 O 4 /(NiSc 0.03 Fe 1.97 O 4 ) x (0 ≤ x ≤ 5) or simply (CFO-xNFSO) nanocrystals (NCs) were synthesized through sol-gel auto-combustion technique. The structural and magnetic properties of the ferrite composite NCs were explored in detail. The synthesized NCs were applied in the fabrication of supercapacitor electrodes to investigate their potential in energy storage applications. The cubic spinel ferrite phase of the NCs was verified by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HR-TEM) techniques. The NCs with different x ratios displayed smoothed magnetic hysteresis loops during magnetization at 300 and 10 K temperature. In addition, the plots of switching field distribution (SFD) indicated a single peak in dM/dH vs H plots. These findings demonstrate a good exchange-coupling in the CFO-xNFSO (0.0 ≤ x ≤ 5) magnetic NCs. The supercapacitor devices fabricated from the synthesized NCs displayed enhanced capacitance and relatively high energy density as compare to electric double-layer (EDL) (carbon-based) supercapacitors. The supercapacitor fabricated from CFO-xNFSO for x = 2 showed best performance in terms of specific capacitance with 204.4 F g À1 at a scan rate of 10 mV s À1 . The performances of the fabricated supercapacitors were further tested for a higher potential window of 1.2 V, where a specific energy value of 33.2 Wh kg À1 is achieved that is 144% enhancement from the same supercapacitor working at 0.8 V and 187% enhancement as compared to the carbon-based supercapacitor. The device also displayed excellent stability as it was tested for 5000 chargedischarge cycles.

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“…Electrochemical double-layer capacitor (EDLC) is a device where the energy storage mechanism occurs owing to accumulation of ions at the interfaces between the blocking electrodes and electrolytes. EDLCs have long lifetimes, high power density, fast charge/discharge and identical carbonaceous electrodes [40][41][42]. There are many reports that used polymer electrolytes in EDLC fabrication [40][41][42].…”

Section: Introductionmentioning

confidence: 99%

“…EDLCs have long lifetimes, high power density, fast charge/discharge and identical carbonaceous electrodes [40][41][42]. There are many reports that used polymer electrolytes in EDLC fabrication [40][41][42]. In this study, the highest conducting electrolyte was employed in the fabrication of EDLCs.…”

Section: Introductionmentioning

confidence: 99%

Energy Storage Behavior of Lithium-Ion Conducting poly(vinyl alcohol) (PVA): Chitosan(CS)-Based Polymer Blend Electrolyte Membranes: Preparation, Equivalent Circuit Modeling, Ion Transport Parameters, and Dielectric Properties

Brza

Aziz

Saeed³

et al. 2020

Membranes

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Plasticized lithium-ion-based-conducting polymer blend electrolytes based on poly(vinyl alcohol) (PVA):chitosan (CS) polymer was prepared using a solution cast technique. The conductivity of the polymer electrolyte system was found to be 8.457 × 10−4 S/cm, a critical factor for electrochemical device applications. It is indicated that the number density (n), diffusion coefficient (D), and mobility (μ) of ions are increased with the concentration of glycerol. High values of dielectric constant and dielectric loss were observed at low frequency region. A correlation was found between the dielectric constant and DC conductivity. The achieved transference number of ions (tion) and electrons (te) for the highest conducting plasticized sample were determined to be 0.989 and 0.011, respectively. The electrochemical stability for the highest conducting sample was 1.94 V, indicated by linear sweep voltammetry (LSV). The cyclic voltammetry (CV) response displayed no redox reaction peaks through its entire potential range. Through the constructing electric double-layer capacitor, the energy storage capacity of the highest conducting sample was investigated. All decisive parameters of the EDLC were determined. At the first cycle, the specific capacitance, internal resistance, energy density, and power density were found to be 130 F/g, 80 Ω, 14.5 Wh/kg, and 1100 W/kg, respectively.

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Molybdate incorporated poly(acrylic acid) electrolytes for use in quasi-solid state carbon based supercapacitors: Redox-active polychelates

Cited by 36 publications

References 41 publications

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

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

Investigation of hard/soft CoFe ₂ O ₄ / NiSc ₀ _. ₀₃ Fe ₁ _. ₉₇ O ₄ <

Energy Storage Behavior of Lithium-Ion Conducting poly(vinyl alcohol) (PVA): Chitosan(CS)-Based Polymer Blend Electrolyte Membranes: Preparation, Equivalent Circuit Modeling, Ion Transport Parameters, and Dielectric Properties

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Molybdate incorporated poly(acrylic acid) electrolytes for use in quasi-solid state carbon based supercapacitors: Redox-active polychelates

Cited by 36 publications

References 41 publications

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

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

Investigation of hard/soft CoFe 2 O 4 / NiSc 0 . 03 Fe 1 . 97 O 4 <

Energy Storage Behavior of Lithium-Ion Conducting poly(vinyl alcohol) (PVA): Chitosan(CS)-Based Polymer Blend Electrolyte Membranes: Preparation, Equivalent Circuit Modeling, Ion Transport Parameters, and Dielectric Properties

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Investigation of hard/soft CoFe ₂ O ₄ / NiSc ₀ _. ₀₃ Fe ₁ _. ₉₇ O ₄ <