Flexible symmetric and asymmetric supercapacitors based in nanocomposites of carbon cloth/polyaniline - carbon nanotubes

Bavio, Marcela Alejandra; Acosta, Gerardo; Kessler, T.; Visintín, Arnaldo

doi:10.1016/j.energy.2017.04.135

Cited by 69 publications

(18 citation statements)

References 35 publications

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“…These values are higher or comparable with some other previously reported C s values for carbon fibre materials [19,35,36], biomass-derived carbon materials [9,10], and other types of carbonaceous materials [3]. However, the determined C s for ACF'f are lower than those reported for several metal oxides [37,38] and conducting polymer-based materials [39,40]. Notwithstanding, the results achieved are in accordance with the high specific surface area of the ACF'f sample, which would determine a high double layer capacitance for this carbon material.…”

Section: Charge-discharge Curvessupporting

confidence: 78%

Supercapacitor Electrode Based on Activated Carbon Wool Felt

Pina

Amaya

Marcuzzo

et al. 2018

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An electrical double-layer capacitor (EDLC) is based on the physical adsorption/desorption of electrolyte ions onto the surface of electrodes. Due to its high surface area and other properties, such as electrochemical stability and high electrical conductivity, carbon materials are the most widely used materials for EDLC electrodes. In this work, we study an activated carbon felt obtained from sheep wool felt (ACF'f) as a supercapacitor electrode. The ACF'f was characterized by elemental analysis, scanning electron microscopy (SEM), textural analysis, and X-ray photoelectron spectroscopy (XPS). The electrochemical behaviour of the ACF'f was tested in a two-electrode Swagelok ®-type, using acidic and basic aqueous electrolytes. At low current densities, the maximum specific capacitance determined from the charge-discharge curves were 163 F•g −1 and 152 F•g −1 , in acidic and basic electrolytes, respectively. The capacitance retention at higher current densities was better in acidic electrolyte while, for both electrolytes, the voltammogram of the sample presents a typical capacitive behaviour, being in accordance with the electrochemical results.

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Section: Charge-discharge Curvessupporting

confidence: 78%

Supercapacitor Electrode Based on Activated Carbon Wool Felt

Pina

Amaya

Marcuzzo

et al. 2018

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“…Figure b shows the plot of capacity retention versus the cycle number, and the symmetric SC shows a cycling stability of 87.9% after 5000 CV cycles. The obtained cycling stability is better than those of some recently reported symmetric and asymmetric SCs, as shown in Figure b . A decrement in the capacity after 5000 cycles is observed due to the increment in the resistance values ( R s and R ct ) as seen in the Nyquist plot (Figure c).…”

Section: Resultscontrasting

confidence: 56%

Superfast Electrodeposition of Newly Developed RuCo₂O₄ Nanobelts over Low‐Cost Stainless Steel Mesh for High‐Performance Aqueous Supercapacitor

Chodankar

Dubal

et al. 2018

Adv Materials Inter

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Consequently, many different materials, including carbon, [2] metal oxides, [3] metal sulfides, [4] and conducting polymers, [5] have been assessed for SC applications in order to achieve electrodes with the desired electrochemical properties. Particularly, the redox chemistry of an electrode material strongly affects its electrochemical properties. Considering the importance of redox chemistry in SCs, electrode materials based on redox-rich mixed-transition-metal oxides such as MCo 2 O 4 , MFe 2 O 4 , and MMn 2 O 4 (where M is a metal cation) have been extensively tested in SCs owing to their multiple oxidation states and superior electrical conductivities, specific capacitances, and electrochemical stabilities as compared to those their parent unitary metal oxides. [6] Consequently, several mixed-transitionmetal oxides with different compositions, such as NiCo 2 O 4 , FeCo 2 O 4 , CoFe 2 O 4 , and NiMn 2 O 4 , have already been assessed for application as SC materials. [7][8][9][10] However, among these possible compositions, NiCo 2 O 4 has been the most studied. [11] Cationic substitution of the Co content in MCo 2 O 4 -based electrodes by any new metal cation having a different oxidation state will effectively improve its electrochemical performance. Therefore, it is necessary to test some advanced Co-replacing metal cations. In that respect, RuCo 2 O 4 provides better electrochemical results as both the metal cations have different oxidation states and high electrical conductivity. [12] The problem with the production of Ru/Co-based materials is the high cost of the raw materials. Consequently, researchers are constantly trying to find cheaper alternatives to Ru/Co-based materials. However, there is no doubt that Ru/Co-based metal oxides exhibit superior supercapacitive properties in terms of electrical conductivity, specific capacitance, and cycling stability. More importantly, the different oxidations states of the Ru and Co metal cations improve energy storing capacity, while the higher electrical conductivity supports fast charge-transfer processes. Thus, the aim of the present work was to combine Ru and Co metal cations in a single electrode to take full advantage of both metal cations.In this work, novel thin films composed of RuCo 2 O 4 nanobelts have been grown on low-cost stainless steel mesh The superfast (≈30 min) and template-free electrochemical approach is developed to prepare the unique nanobelts-architectured RuCo 2 O 4 thin films over the stainless steel mesh substrates. The vertically aligned and interconnected RuCo 2 O 4 nanobelts present sufficient interspace to provide more electroactive sites and shorten the diffusion path for electrolyte ions. Owing to their unique nanostructure and higher electrical conductivity, the RuCo 2 O 4 nanobelts exhibit excellent electrochemical features, including a specific capacitance of 1447 F g −1 , and excellent electrochemical stability (82.25% retention over 16 000 cycles). Additional electrochemical kinetic analysis is carried out to confirm whet...

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“…The supercapacitor (SC) offers advantages of wide operating range, high charge–discharge rates, high power density, and long life cycle, The traditional SC with liquid electrolyte was limited by corrosion, electrolyte leakage, and packing . Solid‐state SCs assembled from the electrode and incorporating a solid electrolyte have great promise.…”

Section: Introductionmentioning

confidence: 99%

PEDOT solid‐state polymer supercapacitor assembled with a KI‐doped gel polymer electrolyte

Gan

Yang

et al. 2019

J of Applied Polymer Sci

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Solid‐state polymer supercapacitors (SSP‐SCs) have vast potential for future development due to their compact, safe, environment‐friendly, and facile designing. Thus, prevalent researches have been explored in this area. In this article, poly(3,4‐ethylenedioxythiophene) (PEDOT) SSP‐SCs were assembled by using poly(3,4‐ethylenedioxythiophene)/carbon paper (PEDOT/CP) as electrodes and polyvinyl alcohol/sulfuric acid/potassium iodide (PVA/H2SO4/KI) as the gel polymer electrolyte. The effect of KI content on the electrochemical performance of the SC was studied by cyclic voltammetry, galvanostatic charge–discharge measurements (GCD), and electrochemical impedance spectroscopy. The results indicated that the PEDOT SSP‐SC has excellent electrochemical properties when KI doping amount was 60 wt %. The introduction of KI increased the specific capacitance due to the improved ionic conductivity and additional pseudocapacitance reaction at the electrode–electrolyte interface. The PEDOT SSP‐SC showed high energy and power densities of 451.32 Wh kg−1 and 13.29 kW kg−1, respectively, as well as a specific capacitance of 352.59 F g−1 for a discharge current of 1 mA cm−2. In addition, after 1000 GCD cycles, the PVA/H2SO4/KI‐based PEDOT SSP‐SC showed capacitance retention of 74.08%. Therefore, the SC exhibits outstanding energy and power density and good cycle stability and has great potential to be used in high‐energy density equipment. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48723.

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Flexible symmetric and asymmetric supercapacitors based in nanocomposites of carbon cloth/polyaniline - carbon nanotubes

Cited by 69 publications

References 35 publications

Supercapacitor Electrode Based on Activated Carbon Wool Felt

Supercapacitor Electrode Based on Activated Carbon Wool Felt

Superfast Electrodeposition of Newly Developed RuCo₂O₄ Nanobelts over Low‐Cost Stainless Steel Mesh for High‐Performance Aqueous Supercapacitor

PEDOT solid‐state polymer supercapacitor assembled with a KI‐doped gel polymer electrolyte

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Flexible symmetric and asymmetric supercapacitors based in nanocomposites of carbon cloth/polyaniline - carbon nanotubes

Cited by 69 publications

References 35 publications

Supercapacitor Electrode Based on Activated Carbon Wool Felt

Supercapacitor Electrode Based on Activated Carbon Wool Felt

Superfast Electrodeposition of Newly Developed RuCo2O4 Nanobelts over Low‐Cost Stainless Steel Mesh for High‐Performance Aqueous Supercapacitor

PEDOT solid‐state polymer supercapacitor assembled with a KI‐doped gel polymer electrolyte

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Superfast Electrodeposition of Newly Developed RuCo₂O₄ Nanobelts over Low‐Cost Stainless Steel Mesh for High‐Performance Aqueous Supercapacitor