Supercapacitor Based On Active Carbon Electrode: Review

Surawan, Tri; Priambodo, Purnomo Sidi

doi:10.1109/qir.2019.8898254

Cited by 3 publications

(4 citation statements)

References 27 publications

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“…The specific capacitance value is comparable with activated carbon‐based electrode materials (∼368 F/g for coconut shell‐based activated carbon in 6 M KOH). If we normalize the specific capacitance with respect to specific surface area (SSA), amorphous Cr 2 O 3 (∼155 m 2 /g) outperforms activated carbon (1532 m 2 /g) [41,42] . Additionally, compared with widely used metal oxides (MO), despite the modest SSA, amorphous Cr 2 O 3 performs better [43,44,9] …”

Section: Resultsmentioning

confidence: 99%

“…If we normalize the specific capacitance with respect to specific surface area (SSA), amorphous Cr 2 O 3 (∼ 155 m 2 /g) outperforms activated carbon (1532 m 2 /g). [41,42] Additionally, compared with widely used metal oxides (MO), despite the modest SSA, amorphous Cr 2 O 3 performs better. [43,44,9] Energy density and power density of prepared amorphous and crystalline Cr 2 O 3 samples are obtained using the galvanostatic charge-discharge (GCD) study.…”

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confidence: 99%

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Amorphous Cr₂O₃ Sheets: A Novel Supercapacitor Electrode Material

et al. 2022

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An ongoing field of study involves improving the performance and stability of benchmarked metal catalysts employing nanostructured non‐metallic materials, which is both fascinating from a fundamental and an application standpoint. By rapidly thermally exfoliating CrCl3 6H2O precursors, amorphous few‐layered nanosheets of Cr2O3 (3‐5 nm) are synthesized. The exfoliated Cr2O3 was characterized using structural and electrochemical techniques. Cyclic Voltammetry (CV) revealed that the material delivers a specific capacitance of 1100 F/g at 10 mV/s, which is among the best‐reported values for this material. This sample has a modest surface area of 155 m2/g with a mesoporous structure. Electrochemical impedance spectra (EIS) for amorphous Cr2O3 revealed lower series resistance (Rs) and charge transfer resistance (Rct) of 0.6 Ω and 0.88 Ω, respectively. Additionally, this material delivers a desirable energy and power density of 20.2 Wh/kg and 125 W/kg, respectively.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Amorphous Cr₂O₃ Sheets: A Novel Supercapacitor Electrode Material

et al. 2022

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“…Supercapacitors are mostly used in wearable and portable electronics, hybrid vehicles, regenerative braking, and medicinal applications . Various sp 2 -hybridized carbon allotropes such as activated carbon, carbon nanotubes (CNTs), and graphene have been explored extensively for supercapacitor applications with an aim to utilize their large specific surface area, porous nature, high electrical conductivity, good charge transport capability, and high electrolyte accessibility. − However, the limitations of CNTs and graphene are the lack of solubility in aqueous media, suboptimal stability, inducing defects during exfoliation (mostly in graphene), and being extremely expensive for mass production. , Recently, boron- or nitrogen-doped conductive diamond demonstrated a large electrochemical potential window of up to 3.5 V in the aqueous electrolyte to enable greater operation voltages, and they have been favorably considered as a supercapacitor electrode material. , The rigidity of diamond prevents it from being used in circumstances that call for mechanical flexibility, but its great endurance and biocompatibility offer advantages over other supercapacitor materials for long-term applications, i.e., chronic biosensing . Although diamond has not yet gained widespread use because of its relatively expensive fabrication cost and a wide variety of processing-related challenges, it has generated adequate interest in the scientific community due to its exceptional properties and broad prospective market .…”

Section: Introductionmentioning

confidence: 99%

Highly Stable Electrochemical Supercapacitor Performance of Self-Assembled Ferromagnetic Q-Carbon

Karmakar

Taqy

Droopad

et al. 2023

ACS Appl. Mater. Interfaces

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Novel phase Q-carbon thin films exhibit some intriguing features and have been explored for various potential applications. Herein, we report the growth of different Q-carbon structures (i.e., filaments, clusters, and microdots) by varying the laser energy density from 0.5 to 1.0 J/cm 2 during pulsed laser annealing of amorphous diamond-like carbon films with different sp 3 −sp 2 carbon compositions. These unique nano-and microstructures of Q-carbon demonstrate exceptionally stable electrochemical performance by cyclic voltammetry, galvanostatic charging−discharging, and electrochemical impedance spectroscopy for energy applications. The temperature-dependent magnetic studies (magnetization vs magnetic field and temperature) reveal the ferromagnetic nature of the Qcarbon microdots. The saturation magnetization and coercive field values decrease from 132 to 14 emu/cc and 155 to 92 Oe by increasing the temperature from 2 to 300 K, respectively. The electrochemical performances of Q-carbon filament, cluster, and microdot thin-film supercapacitors were investigated by twoelectrode configurations, and the highest areal specific capacitance of ∼156 mF/cm 2 was observed at a current density of 0.15 mA/ cm 2 in the Q-carbon microdot thin film. The Q-carbon microdot electrodes demonstrate an exceptional capacitance retention performance of ∼97.2% and Coulombic efficiency of ∼96.5% after 3000 cycles due to their expectational reversibility in the charging−discharging process. The kinetic feature of the ion diffusion associated with the charge storage property is also investigated, and small changes in equivalent series resistance of ∼9.5% and contact resistance of ∼9.1% confirm outstanding stability with active charge kinetics during the stability test. A high areal power density of ∼5.84 W/cm 2 was obtained at an areal energy density of ∼0.058 W h/cm 2 for the Q-carbon microdot structure. The theoretical quantum capacitance was obtained at ∼400 mF/ cm 2 by density functional theory calculation, which gives an idea about the overall capacitance value. The obtained areal specific capacitance, power density, and impressive long-term cyclic stability of Q-carbon thin-film microdot electrodes endorse substantial promise in high-performance supercapacitor applications.

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“…However, the reported capacitances of carbonaceous materials are typically about 300-400 F/g in spite of high specific surface areas [15,16]. For instance, activated carbon, with a possible specific surface area up to 2500-3000 m 2 /g and pore volume approximately 2 cm 3 /g [17], can exhibit relatively low specific capacitance since its very small pore size (<2 nm in the majority) limits the electrolyte to access the entire surface area [18][19][20]. On the other hand, carbon-family materials have shown almost 100% chemical stability after a high number of charging-discharging cycles and their addition to composites significantly enhances the cycling stability.…”

Section: Introductionmentioning

confidence: 99%

Polyaniline—Graphene Electrodes Prepared by Electropolymerization for High-Performance Capacitive Electrodes: A Brief Review

Okhay

Tkach

2022

Batteries

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Both polyaniline (PANI) and graphene are widely studied for their application as capacitive electrodes in energy storage devices. However, although PANI can be easy synthesized, is of low cost and has a higher specific capacitance than graphene, pristine PANI electrodes do not present long-term stability due to their large volume changes during release/doping of the electrolyte ions and surface area reduction with charge–discharge cycling. That is why a combination of PANI with carbonaceous materials, especially conductive and high-surface-area graphene as well as more widely used reduced graphene oxide (rGO), provides an effective approach to solve these problems. At the same time, the electropolymerization process is one of the possible methods for synthesis of PANI composites with G or rGO as freestanding electrodes. Therefore, no binders or additives such as carbon black or active carbon need to be used to obtain PANI/rGO electrodes by electrochemical polymerization (EP), in contrast to similar electrodes prepared by the chemical oxidative polymerization method. Thus, in this paper, we review recent advances in EP synthesis of PANI/rGO nanocomposites as high-performance capacitive electrode materials, combining the advantages of both electrical double-layer capacitance of rGO and pseudocapacitance of PANI, which hence exhibit long cycle life and high specific energy.

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Supercapacitor Based On Active Carbon Electrode: Review

Cited by 3 publications

References 27 publications

Amorphous Cr₂O₃ Sheets: A Novel Supercapacitor Electrode Material

Amorphous Cr₂O₃ Sheets: A Novel Supercapacitor Electrode Material

Highly Stable Electrochemical Supercapacitor Performance of Self-Assembled Ferromagnetic Q-Carbon

Polyaniline—Graphene Electrodes Prepared by Electropolymerization for High-Performance Capacitive Electrodes: A Brief Review

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Supercapacitor Based On Active Carbon Electrode: Review

Cited by 3 publications

References 27 publications

Amorphous Cr2O3 Sheets: A Novel Supercapacitor Electrode Material

Amorphous Cr2O3 Sheets: A Novel Supercapacitor Electrode Material

Highly Stable Electrochemical Supercapacitor Performance of Self-Assembled Ferromagnetic Q-Carbon

Polyaniline—Graphene Electrodes Prepared by Electropolymerization for High-Performance Capacitive Electrodes: A Brief Review

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Amorphous Cr₂O₃ Sheets: A Novel Supercapacitor Electrode Material

Amorphous Cr₂O₃ Sheets: A Novel Supercapacitor Electrode Material