Effect of carbon dimensions on the electrochemical performance of SnSe2 anode for Na-ion batteries
| Autor: | Jia Ma, Sai Wang, Xu Yang, Dan Xu, Rongyu Zhang, Shifeng Xu |
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| Rok vydání: | 2021 |
| Předmět: |
Work (thermodynamics)
Materials science Graphene Mechanical Engineering chemistry.chemical_element Nanotechnology 02 engineering and technology Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences 0104 chemical sciences law.invention Anode chemistry Mechanics of Materials law General Materials Science 0210 nano-technology Ball mill Carbon Electrical conductor |
| Zdroj: | Materials Letters. 284:128989 |
| ISSN: | 0167-577X |
| Popis: | The emerging Na-ion batteries have attracted the world’s attention due to abundant resources and low cost. SnSe2 is a promising anode material with high capacity. To overcome the poor electronic conductivity and large volume expansion, different dimensional carbon, including Super P, carbon nanotube and graphene, are compositing with SnSe2 via ball milling. It is proved that 2 dimensional (2D) graphene could better improve the capacity, cycle stability, and reduce the charge transfer resistance. The conductive network of graphene accelerated both long-range and short-range charge transfer, which is better than that of others. Thus SnSe2/RGO sample delivers the highest specific capacity of 469 mAh g−1 at 50 mA g−1 and 145 mAh g−1 at 5 A g−1. This work reveals that the dimension of carbon is an important factor in materials design and performance improvement. |
| Databáze: | OpenAIRE |
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