A novel method to synthesize BiSI uniformly coated with rGO by chemical bonding and its application as a supercapacitor electrode material
| Autor: | Xufeng Xiao, Neil Robertson, Yue Hu, Veronica Celorrio, Huapeng Sun, Zhenfu Guo, Caroline A. Kirk |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Composite number Oxide chemistry.chemical_element 02 engineering and technology engineering.material 010402 general chemistry Electrochemistry 01 natural sciences law.invention Bismuth chemistry.chemical_compound Coating law General Materials Science Supercapacitor Renewable Energy Sustainability and the Environment Graphene General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering Electrode engineering 0210 nano-technology |
| Zdroj: | Sun, H, Xiao, X, Celorrio, V, Guo, Z, Hu, Y, Kirk, C & Robertson, N 2021, ' A novel method to synthesize BiSI uniformly coated with rGO by chemical bonding and its application as a supercapacitor electrode material ', Journal of Materials Chemistry A . https://doi.org/10.1039/D1TA02988F |
| ISSN: | 2050-7496 2050-7488 |
| Popis: | In this paper, we demonstrate a novel synthetic route to assemble reduced graphene oxide (rGO) uniformly coated on BiSI composite and investigate its potential as the active electrode material for supercapacitors. In this strategy, graphene oxide (GO) was not a simple physical mixture with the BiSI material but bismuth cations were uniformly anchored on the surface of GO by chemical bonding during material growth and the size of GO can determine the final size of rGO coated BiSI composite. The galvanostatic charge–discharge measurement results show that the BiSI–rGO electrode has a maximum specific capacity of 234 C g−1 at the current density of 1 A g−1 and excellent capacity retention of 92.4% after 2000 cycles. In situ XANES and EXAFS were employed to study the electrochemical oxidation and reduction processes of the bismuth-based material with rGO coating and investigate the origins of the structural stabilities. The results show that our novel rGO coating route can not only significantly increase the capacity but also improve cycling stability. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|