Sb2O4@rGO Nanocomposite Anode for High Performance Sodium-Ion Batteries
| Autor: | C. Nithya, Nitesh Kumar, Bindhya K. Purushothaman, Kiruthiga Ramakrishnan, Sukumaran Gopukumar |
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| Rok vydání: | 2017 |
| Předmět: |
Nanocomposite
Materials science Renewable Energy Sustainability and the Environment General Chemical Engineering Nanoparticle Nanotechnology 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Ion Anode Chemical engineering Electrode Environmental Chemistry 0210 nano-technology Current density Ion transporter |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 5:5090-5098 |
| ISSN: | 2168-0485 |
| Popis: | Research on high performance electrode materials is significant for further development of sodium ion batteries (NIBs). The Sb2O4 anode can be employed as a promising anode material for NIBs owing to its high theoretical capacity of 1227 mAh·g–1. In this paper, we report the Sb2O4@rGO nanocomposite anode for NIBs which exhibit good cyclability and rate capability due to the formation of wrinkled rGO nanosheets during cycling. Well-formed nanowrinkles act as a template for anchoring Sb2O4 particles during cycling and effectively alleviate the strain due to the volume expansion. The improved electrochemical performance is attributed to the shorter Na+ ion diffusion path length from the small nanoparticles and good electrons as well as ion transport from the intimate contact between the active Sb2O4 particles and rGO matrix. At a current density of 0.1 A·g–1, it retains the 94.2% (890 mAh·g–1) of initial reversible capacity after 100 cycles. Over prolonged cycling (after 500 cycles), the Sb2O4@rGO electrode ... |
| Databáze: | OpenAIRE |
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