Boron acid catalyzed synthesis porous graphene sponge for high-performance electrochemical capacitive storage
| Autor: | Aiping Yu, Lixia Wang, Ji Yan, Ricky Tjandra, Hua Fang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Heteroatom chemistry.chemical_element 02 engineering and technology 010402 general chemistry Electrochemistry 01 natural sciences Catalysis law.invention Boric acid chemistry.chemical_compound law Materials Chemistry Electrical and Electronic Engineering Boron Supercapacitor Graphene Mechanical Engineering General Chemistry 021001 nanoscience & nanotechnology 6. Clean water 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Chemical engineering Electrode 0210 nano-technology |
| Zdroj: | Diamond and Related Materials. 89:114-121 |
| ISSN: | 0925-9635 |
| DOI: | 10.1016/j.diamond.2018.08.016 |
| Popis: | Carbon materials possessing porous structure as well as high heteroatom doping content gradually become critical components in various electrochemical storage applications. Here, a facile route based on boric acid catalysis synthesis process was proposed to prepare hierarchical boron-doped graphene sponge. The hydrolyzed intermediate B(OH)+4 from boric acid acts as porous forming agent precisely making contribution to the macro-porous structure of graphene. Benefiting from unique structure and boron doping (2.4%), the obtained graphene sponge exhibits a significant improvement in capacitance (369.2 F g−1 at 2 A g−1) and maintains an outstanding rate capability (174.9 F g−1 at 30 A g−1). After 1500 cycles at 5 A g−1, the sponge electrode still possesses 91.7% of capacitance retention, revealing the promising future as a high-performance electrode material for supercapacitors. |
| Databáze: | OpenAIRE |
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