A Facile Synthesis Strategy for N-Doped Graphene Quantum Dots Electrode Materials: Electrochemical Behaviors and Universal Energy Storage Mechanism
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| Publicat a: | Materials vol. 18, no. 23 (2025), p. 5373-5391 |
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| Altres autors: | , , , |
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MDPI AG
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| Accés en línia: | Citation/Abstract Full Text + Graphics Full Text - PDF |
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| 001 | 3280959158 | ||
| 003 | UK-CbPIL | ||
| 022 | |a 1996-1944 | ||
| 024 | 7 | |a 10.3390/ma18235373 |2 doi | |
| 035 | |a 3280959158 | ||
| 045 | 2 | |b d20250101 |b d20251231 | |
| 084 | |a 231532 |2 nlm | ||
| 100 | 1 | |a Wang, Yongbo |u College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China | |
| 245 | 1 | |a A Facile Synthesis Strategy for N-Doped Graphene Quantum Dots Electrode Materials: Electrochemical Behaviors and Universal Energy Storage Mechanism | |
| 260 | |b MDPI AG |c 2025 | ||
| 513 | |a Journal Article | ||
| 520 | 3 | |a In this paper, a simple hydrothermal approach is employed to prepare nitrogen-doped graphene quantum dots (N-GQDs) with controllable size and structural features, where citric acid and ethylenediamine served as the carbon and nitrogen precursors, respectively. The influence of hydrothermal temperature and duration on the structural features, surface chemistry, and electrochemical behavior of N-GQDs is systematically investigated. The capacitive behavior of N-GQD electrodes exhibits typical pseudocapacitive characteristics, primarily attributed to the surface functional groups. The NG-2 electrode (180 °C, 6 h) demonstrates a specific capacitance of 309.8 F g−1 at 1 A g−1 and maintains 98.1% of its initial capacitance after 8000 cycles, confirming excellent stability. Density functional theory (DFT) results demonstrate that the co-presence of graphitic and pyrrolic nitrogen induces a synergistic modulation of the electronic structure, resulting in improved charge-transfer kinetics and surface reactivity of N-GQDs compared to single-type nitrogen doping. Additionally, NG-2//activated carbon (AC)-asymmetric supercapacitor (ASC) achieves an energy density of 22.5 Wh kg−1 at 500 W kg−1 and maintains outstanding cycling stability. This work provides valuable insights into the design and application of N-GQDs for advanced energy storage devices. | |
| 651 | 4 | |a China | |
| 651 | 4 | |a Japan | |
| 653 | |a Electrons | ||
| 653 | |a Electrodes | ||
| 653 | |a Electrode materials | ||
| 653 | |a Nitrogen | ||
| 653 | |a Capacitance | ||
| 653 | |a Computer simulation | ||
| 653 | |a Energy storage | ||
| 653 | |a Functional groups | ||
| 653 | |a Activated carbon | ||
| 653 | |a Citric acid | ||
| 653 | |a Energy consumption | ||
| 653 | |a Composite materials | ||
| 653 | |a Ethanol | ||
| 653 | |a Carbon black | ||
| 653 | |a Electrolytes | ||
| 653 | |a Electrochemical analysis | ||
| 653 | |a Graphene | ||
| 653 | |a Spectrum analysis | ||
| 653 | |a Fourier transforms | ||
| 653 | |a Ethylenediamine | ||
| 653 | |a Microscopy | ||
| 653 | |a Controllability | ||
| 653 | |a Stability | ||
| 653 | |a Quantum dots | ||
| 653 | |a Density functional theory | ||
| 653 | |a Electronic structure | ||
| 653 | |a Morphology | ||
| 700 | 1 | |a Dai Shichao |u Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250061, China | |
| 700 | 1 | |a Guo Jinghe |u Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250061, China | |
| 700 | 1 | |a Wang, Yanxiang |u Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250061, China | |
| 700 | 1 | |a Tang, Bo |u College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China | |
| 773 | 0 | |t Materials |g vol. 18, no. 23 (2025), p. 5373-5391 | |
| 786 | 0 | |d ProQuest |t Materials Science Database | |
| 856 | 4 | 1 | |3 Citation/Abstract |u https://www.proquest.com/docview/3280959158/abstract/embedded/75I98GEZK8WCJMPQ?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text + Graphics |u https://www.proquest.com/docview/3280959158/fulltextwithgraphics/embedded/75I98GEZK8WCJMPQ?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text - PDF |u https://www.proquest.com/docview/3280959158/fulltextPDF/embedded/75I98GEZK8WCJMPQ?source=fedsrch |