Core-shell SnSe@TiO2/C heterostructure high-performance anode for Na-ion batteries
| Autor: | Yuqi Xing, Jianwen Wang, Rashid Khan, Lu Huang, Xiuli Zhu, Jianhua Zhu, Yingpeng Wu |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Mechanical Engineering Composite number Metals and Alloys Nanoparticle Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Anode Ion Chemical engineering Mechanics of Materials Materials Chemistry Reactivity (chemistry) 0210 nano-technology Current density |
| Zdroj: | Journal of Alloys and Compounds. 880:160469 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2021.160469 |
| Popis: | The core-shell SnSe@TiO2/C heterostructure composite with high reactivity, small size, and superior electrochemical performance for sodium-ion batteries (SIBs) was synthesized for the first time using a controllable arc-discharge technique. The electrochemical measurements demonstrate that the outstanding mechanical stability of the TiO2 shell can improve the cycling stability, rate capability, and high specific capacity of SnSe. The as-prepared core-shell SnSe@TiO2/C composite combines the benefits of SnSe and TiO2, with SnSe nanoparticles improving ion diffusion kinetics and specific capacity while TiO2 maintains excellent cycling stability. Furthermore, the core-shell heterostructure approach can synergistically reduce volume fluctuation and aggregation of active materials during cycling. At a current density of 1 A/g, the capacity can reach 318 mAh/g, with a steady cycling performance of 1100 cycles. The novel core-shell heterostructure composite is expected to be a promising candidate as an anode material for next-generation high-performance SIBs due to its outstanding electrochemical performance and ease of synthesis for large-scale production. |
| Databáze: | OpenAIRE |
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