Nanocomposites composed of sulfonated polysulfone/hexagonal boron nitride/ionic liquid for supercapacitor applications

Günday, Şeyda Tuğba; Çevik, Emre; Yusuf, Abdulmalik; Bozkurt, Ayhan

doi:10.1016/j.est.2019.01.008

Cited by 50 publications

(20 citation statements)

References 23 publications

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“…Carbon composite electrodes were produced by setting the mixture content with 80% of AC, 10% of PVDF, and 10% of conductive carbon as optimized ratios . Automatic coating machine was used to coat the resulting carbon composite slurry onto the aluminum current collector (thickness: 10 μm) using MRX Shenzhen Automation Equipment.…”

Section: Methodsmentioning

confidence: 99%

“…Supercapacitors are important technologies for electrochemical energy storage systems and sustainable, faster, and efficient use of energy . These systems have drawn more attention due to their wide variety of technological applications into portable electronics, automotive, and grid scale applications . In general, supercapacitors can provide higher power (5‐15 kW kg −1 ) and have extremely high cycle stability, but they can exhibit low energy storage capacity (10 Wh kg −1 ).…”

Section: Introductionmentioning

confidence: 99%

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Design of high‐performance flexible symmetric supercapacitors energized by redox‐mediated hydrogels including metal‐doped acidic polyelectrolyte

Çevik

Bozkurt

2020

Int J Energy Res

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Summary The fabrication of flexible supercapacitors was achieved by employing the novel redox‐activated polymer electrolytes comprising poly(vinylphosphonic acid) (PVPA) and nickel nitrate Ni(NO3)2, Ni. The hydrogels, PVPA/NiX, were produced in various contents, in which X denotes the doping fraction of Ni in PVPA. The structure, thermal, and morphology of the materials were characterized, and then they were applied for construction of supercapacitors. The performance evaluations of the fabricated devices were carried out by electrochemical impedance spectroscopy, galvanostatic charge‐discharge, and cyclic voltammetry experiments. Flexible supercapacitor devices assembled with activated carbon (AC) electrodes and PVPA/NiX hydrogels produced 793 F g−1 specific capacitance with 30 times enhanced capacitance compared with Ni‐free system. The energy density of 103.1 Wh kg−1 was yielded from the device at a power density of 500 W kg−1. The supercapacitor demonstrated an excellent performance during 5.000 charge‐discharge cycles, while preserving 84% of its initial capacitance. The supercapacitor constructed of 1 × 5 cm dimension, successfully operates the LED after charging at 3 V.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of high‐performance flexible symmetric supercapacitors energized by redox‐mediated hydrogels including metal‐doped acidic polyelectrolyte

Çevik

Bozkurt

2020

Int J Energy Res

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“…The utilization of the GCD method was employed to evaluate the specific capacitance ( C s) parameters of the samples. The specific capacitance calculation was achieved according to Equation :

((), C normals) = 2 \times I \times italic∆t / ((), w \times italic∆V),

where I is the discharge current, ∆t is the discharge time, w is the mass of the electrode, and ∆V is the voltage difference in discharge …”

Section: Methodsmentioning

confidence: 99%

“…where I is the discharge current, Δt is the discharge time, w is the mass of the electrode, and ΔV is the voltage difference in discharge. [25][26][27] The produced supercapacitors were evaluated for their energy capacity and power densities by utilization of Equations (3) and (4), correspondingly.…”

Section: S C H E M E 1 Synthesis Mechanismmentioning

confidence: 99%

Construction of symmetric supercapacitors using anhydrous electrolytes containing heterocyclic oligomeric structures

et al. 2019

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Summary The anhydrous electrolytes have become an important part of supercapacitors, which provide temperature‐tolerant applications in various electronic devices. This work reports on the fabrication of a wide‐temperature‐range supercapacitor using 3‐amino‐1H‐1,2,4‐triazole (Atri)/1,4‐butanediol diglycidyl ether (BG) and imidazole (Imi)/BG–based electrolytes in active carbon‐based electrodes. The triazole‐terminated BG (BG(Atri)2) and Imi‐terminated BG (BG(Imi)2) were initially synthesized, and then anhydrous electrolytes were produced by doping BG(Atri)2 and BG(Imi)2 with phosphoric acid (H3PO4) and ionic liquid (IL) at different molar fractions. The supercapacitors constructed with the anhydrous BG(Atri)2/H3PO4/0.1IL and BG(Imi)2/H3PO4/0.1IL electrolytes provided maximum specific capacitances (Cs) of 114 and 191 F g−1 at 1 A g−1, respectively. The corresponding electrolytes yielded the highest energy densities of 15.8 and 26.7 Wh kg−1 at the power densities of 1150 and 1225 W kg−1, respectively. The Imi‐terminated electrolyte‐based supercapacitor indicated superior performance and efficiency even after 2300 charge‐discharge cycles by holding 20% of its original capacitance. The temperature dependence of the supercapacitors' capacitances was studied, and they increased from 191 to 266 F g−1 for BG(Imi)2/H3PO4/0.1IL and from 114 to 148 F g−1 for BG(Tri)2/H3PO4/0.1IL as the temperature increased from 25°C to 75°C.

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“…Elevated chargingdischarging rate, high power capability, low manufacturing as well as maintenance cost and ultra-long cycling life 12,13 make the supercapacitor (SC) one of the most efficient energy storage devices for a wide range of applications from micro to macro electrical gadgets (i.e. are generally used in traditional EDLC [16][17][18][19][20][21] . Electrochemical double layer capacitor (EDLC) contains electrode and electrolyte and these two are main components to determine the amount of power and energy that can be stored in electrochemical cell.…”

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confidence: 99%

Naturally occurring neem gum: An unprecedented green resource for bioelectrochemical flexible energy storage device

Dhar

Kumar

Khimani³

et al. 2019

Int J Energy Res

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Naturally available neem tree gum consisting of bioelectrolyte and bioelectrode was fabricated for flexible energy storage device. Structural morphology, thermal stability, porosity and surface area of as prepared bioelectrode were characterized thoroughly by using scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and Brunauer-Emmett-Teller (BET) isotherm respectively. The bioelectrolyte conductivity was optimized under various concentrations of lithium ion salts and temperatures through electrochemical impedance spectroscopy (EIS). A flexible supercapacitor (SCs) was fabricated by using bioelectrodes and electrolyte and tested for its electrochemical properties. The supercapacitor displayed specific capacitance of 640 Fg -1 and 200 Fg -1 at a current density 0.5 Ag -1 and 1.0 V operating potential window. The energy device has also demonstrated large operational window (2.0 V) and shown 102 Fg -1 at a current density of 1.0 Ag -1 . The novelty of the present work lies in the simplified, cost-effective procedure for preparation of biomaterials, their remarkably high stability under strong mechanical bent and long-term charging-discharging cycles of the fabricated device.

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Nanocomposites composed of sulfonated polysulfone/hexagonal boron nitride/ionic liquid for supercapacitor applications

Cited by 50 publications

References 23 publications

Design of high‐performance flexible symmetric supercapacitors energized by redox‐mediated hydrogels including metal‐doped acidic polyelectrolyte

Design of high‐performance flexible symmetric supercapacitors energized by redox‐mediated hydrogels including metal‐doped acidic polyelectrolyte

Construction of symmetric supercapacitors using anhydrous electrolytes containing heterocyclic oligomeric structures

Naturally occurring neem gum: An unprecedented green resource for bioelectrochemical flexible energy storage device

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