Three-dimensional nitrogen-doped graphene hydrogel-based flexible all-solid-state supercapacitors
| Autor: | Minjie Zhou, Wan-Yun Xie, Liang Chen, Wei Wang, Feixiang Zhou, Enxiang Liang, Wenyuan Xu, Guo-Xiang Wang |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Supercapacitor Materials science Graphene Mechanical Engineering 02 engineering and technology Electrolyte 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences Capacitance law.invention Chemical engineering Mechanics of Materials law 0103 physical sciences medicine Ionic conductivity General Materials Science Swelling medicine.symptom 0210 nano-technology Current density |
| Zdroj: | Journal of Materials Research. 36:376-386 |
| ISSN: | 2044-5326 0884-2914 |
| DOI: | 10.1557/s43578-020-00022-3 |
| Popis: | In this paper, a three-dimensional nitrogen-doped graphene nano-gel electrolyte (3DNG-PDMA nano-gel) for the preparation of high-performance all-solid-state supercapacitors was studied. Our research shows that the gel electrolyte has a stable three-dimensional network structure and good ionic conductivity (0.0625 S cm−1), and the all-solid-state supercapacitors (SCs) prepared by this gel electrolyte present good electrochemical performance. The specific capacitance of supercapacitor is 187.5 F g−1 under the current density of 1 A g−1. Even at the high power density of 5 kW kg−1, the energy density of supercapacitor can still reach 38 Wh kg−1. After 2500 cycles, the specific capacitance remains 84.1% of the initial value, indicating that the material has good cycle stability. Besides, the gel has high mechanical flexibility, the strain reaches 2409.4% under the stress of 1805.48 kPa, and it has excellent swelling performance with the swelling rate of 706% in 5 h. |
| Databáze: | OpenAIRE |
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