Synthesis and characterization of MnO2/Eggplant carbon composite for enhanced supercapacitors

Wang, X.; Chu, J.; Yan, Haishui; Zhang, H.K.

doi:10.1016/j.heliyon.2022.e10631

Cited by 3 publications

(1 citation statement)

References 40 publications

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“…The dramatic weight loss between 400℃ to 450℃ and 450℃ to 800℃ was attributed to the oxidization of carbon components from Pluronic and humic acid, respectively [27]. After that, a short plateau was observed, indicating the complete decomposition of carbon components and the formation of crystalline MnO2 as the metal decomposition product [28]. As known, EDLCs and pseudocapacitors are energy storage mechanisms associated with carbonaceous materials and metal oxides, respectively.…”

Section: Resultsmentioning

confidence: 94%

Leonardite humic acid activated carbon/MnO\(_{2}\) composite nanostructures for supercapacitors

AUSAVASUKHI,

SIRIPHALA,

LIMPHIRAT

et al. 2024

J Met Mater Miner

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This work reports the preparation and electrochemical studies of activated carbon derived from leonardite humic acid composited with MnO2 for supercapacitors. Activated carbon contains high conductivity, high specific surface area, and accommodates large volume expansion/contraction during charging/discharging process. Meanwhile, MnO2 has very high theoretical specific capacity (1370 F∙g‒1). Their composite could significantly improve both the storage performance and cycle stability of supercapacitors. Moreover, humic acid from leonardite was selected to add value to this waste and reduce environmental pollution. By varying the carbonization temperature (500℃ to 800℃), the prepared samples carbonized at 800℃ exhibited fascinating properties. The oxidation state of Mn ions was in the mixed state of Mn+2 (41.2%) and Mn+2, +3 (52.8%). A gravimetric capacitance of 329 F∙g‒1 and 294 F∙g‒1 were observed at 2 mVs-1 and 0.5 Ag-1, respectively. The remaining gravimetric capacitance of 193 F∙g‒1 was evaluated at 1000 cycles, indicating its high cycle performance. Moreover, the gravimetric energy of 37.51 Wh∙kg‒1 and gravimetric power of 272.96 W∙kg‒1 were observed. When combined, the interesting electrochemical properties of leonardite humic acid-activated carbon/MnO2 composite nanostructures make them important options for supercapacitor application.

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Section: Resultsmentioning

confidence: 94%

Leonardite humic acid activated carbon/MnO\(_{2}\) composite nanostructures for supercapacitors

AUSAVASUKHI,

SIRIPHALA,

LIMPHIRAT

et al. 2024

J Met Mater Miner

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Biomass Activated Carbon Composites and Their Potential in Supercapacitor Applications: Current Trends and Future Perspectives

Reddygunta,

Kumar

2024

Energy Fuels

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Supercapacitors have attracted increasing research interest in the search for high-power and high-energy-density energy storage systems, because they combine the exceptional power density of double-layer electrodes with the high energy density of faradaic-type electrodes into a single device. Biomass has been used as a renewable precursor to prepare carbonaceous electrodes for supercapacitor application, because of its diverse compositions and morphologies, excellent intrinsic structures, and renewability. Moreover, biomass activated carbons combined with pseudocapacitive/2D materials have become more popular as high-performance electrodes for supercapacitors in recent years. Therefore, we provide an overview of recent developments in the biomass activated carbon-based composites containing metal oxides, hydroxides, sulfides, MXenes, metal−organic frameworks (MOFs), and polymers with some physical properties and their applications for supercapacitors. These electrodes offer a lot of commercial application potential, because of their remarkable electrochemical stability, excellent cyclic stability, high electrical conductivity, and effective charge transport kinetics at the electrode/electrolyte junction. In relation to the utilization of high-performance supercapacitor electrodes, we have completed this Review with some future trends and opportunities for development of composite electrodes with biomass activated carbon as the conductive template.

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Manganese dioxide (MnO₂) and biomass-derived carbon-based electroactive composite materials for supercapacitor applications

Patil,

Jadhav

2024

RSC Appl. Interfaces

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Synthesis and characterization of MnO2/Eggplant carbon composite for enhanced supercapacitors

Cited by 3 publications

References 40 publications

Leonardite humic acid activated carbon/MnO\(_{2}\) composite nanostructures for supercapacitors

Leonardite humic acid activated carbon/MnO\(_{2}\) composite nanostructures for supercapacitors

Biomass Activated Carbon Composites and Their Potential in Supercapacitor Applications: Current Trends and Future Perspectives

Manganese dioxide (MnO₂) and biomass-derived carbon-based electroactive composite materials for supercapacitor applications

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Synthesis and characterization of MnO2/Eggplant carbon composite for enhanced supercapacitors

Cited by 3 publications

References 40 publications

Leonardite humic acid activated carbon/MnO\(_{2}\) composite nanostructures for supercapacitors

Leonardite humic acid activated carbon/MnO\(_{2}\) composite nanostructures for supercapacitors

Biomass Activated Carbon Composites and Their Potential in Supercapacitor Applications: Current Trends and Future Perspectives

Manganese dioxide (MnO2) and biomass-derived carbon-based electroactive composite materials for supercapacitor applications

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Manganese dioxide (MnO₂) and biomass-derived carbon-based electroactive composite materials for supercapacitor applications