Fenton Reaction Doubled Biomass Carbon Activation Efficiency for High‐Performance Supercapacitors

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: April 11, 2024

Abstract The huge consumption of alkali during biomass‐derived porous carbon production leads to pollution and high carbon‐emission. This study employs the concept Fenton chemistry achieve hierarchical biomass materials with a remarkably specific surface area 3440 m 2 g −1 double activation efficiency compared traditional process. optimized electrode demonstrates exceptional capacitance 425.2 F at current density 0.1 A great rate performance (286.1 100 ) in 6 KOH electrolyte. enabled supercapacitor remarkable cycling stability, retaining up 99.74% its initial after undergoing 20 000 charge–discharge cycles. In addition, electrolyte ion distribution different pore structures is simulated using Molecular Dynamics, which confirms that structure conducive rapid diffusion ions, thus matching excellent electrochemical properties. assembled symmetric supercapacitors maximum energy 42.1 Wh kg (12.1 based on cell stack mass) TEABF 4 /AN work presents an effective technique for formation from precursors. novel methodology can be applied many other similar systems storage beyond.

Language: Английский

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Unveiling Unconventional Luminescence Behavior of Multicolor Carbon Dots Derived from Phenylenediamine

The Journal of Physical Chemistry Letters, Journal Year: 2023, Volume and Issue: 14(26), P. 5975 - 5984

Published: June 22, 2023

Fluorescence regulation of carbon dots (CDs) during their preparation has become a hot research topic. In this work, multicolor fluorescent CDs with unconventional luminescence behavior are prepared by using o-, m-, or p-phenylenediamine (o-PD, m-PD, p-PD, respectively) and 2,3-dihydroxynaphthalene rich hydroxyl groups as reaction precursors. Tunable bright blue, yellow, red colors can be obtained solvothermal method under the joint action ethanol hydrochloric acid. The fluorescence emission synthesized follows rule o-PD to m-PD p-PD from blue red, which is contrary most previously reported results (the following an order p-PD). Our reveal that differences in polymerization, surface states, functional groups, graphite N content might main reasons for behavior. addition, these have good applications fields light-emitting diode lighting anticounterfeiting.

Language: Английский

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Heteroatom-doped and graphitization-enhanced lignin-derived hierarchically porous carbon via facile assembly of lignin-Fe coordination for high-voltage symmetric supercapacitors

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 659, P. 374 - 384

Published: Dec. 31, 2023

Language: Английский

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Deep eutectic solvents as an emerging green platform for the synthesis of functional materials

Green Chemistry, Journal Year: 2024, Volume and Issue: 26(7), P. 3627 - 3669

Published: Jan. 1, 2024

Deep eutectic solvents (DESs) enable many processes to be environmentally friendly. This Tutorial Review aims showcase the roles of DESs in synthesis functional materials from a green chemistry perspective.

Language: Английский

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Molten salt technique for the synthesis of carbon-based materials for supercapacitors

Green Chemistry, Journal Year: 2023, Volume and Issue: 25(24), P. 10209 - 10234

Published: Jan. 1, 2023

We provide a comprehensive review of the molten salt strategy for preparation carbon-based materials by highlighting roles played salts. The application these carbons in supercapacitors is also discussed.

Language: Английский

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Pre‐Oxidating and Pre‐Carbonizing to Regulate the Composition and Structure of Coal Tar Pitch: The Fabrication of Porous Carbon for Supercapacitor Applications

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(29)

Published: March 18, 2024

Abstract The capacitive properties of supercapacitors highly rely on the reasonable design high‐performance electrode materials. Herein, a synergetic strategy pre‐oxidation and pre‐carbonization is proposed to prepare coal tar pitch (CTP) based porous carbon. formation mechanism carbon revealed. Pre‐oxidation increases heteroatom content promotes decomposition polycyclic aromatic hydrocarbons into small molecules, which more conducive improving subsequent activation enhancing microporous specific surface area. Also, autoclave polymerization precursors yield. Benefiting from synergistic effect pre‐carbonation, obtained exhibits superior capacitance 365 F g −1 . Meanwhile, ZnCl 2 used as hydrogen‐bonding acceptor synthesize ‐EG/PVA deep eutectic solvent (DES) gel, it applicable acidic, neutral, alkaline electrolytes. capacitor assembled with prepared DES gel electrolyte achieves high energy density 41.3 Wh kg works well in unconventional temperatures (−40–75 °C). This work confirms fabrication CTP‐based material expects using other pre‐oxidation/carbonization agents.

Language: Английский

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Biomass-derived carbon applications in the field of supercapacitors: Progress and prospects

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 495, P. 153311 - 153311

Published: June 21, 2024

Language: Английский

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Nitrogen enriched high specific surface area biomass porous carbon: A promising electrode material for supercapacitors

Renewable Energy, Journal Year: 2024, Volume and Issue: 224, P. 120144 - 120144

Published: Feb. 14, 2024

Language: Английский

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N/O co-doped porous carbon synthesized by lewis acid salt activation for high rate performance supercapacitor

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 80, P. 110322 - 110322

Published: Jan. 4, 2024

Language: Английский

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MnO2 porous carbon composite from cellulose enabling high gravimetric/volumetric performance for supercapacitor

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 261, P. 129977 - 129977

Published: Feb. 3, 2024

Language: Английский

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