Electrospun Co/Co3SnC0.7@N-CNFs as free-standing anode for advanced lithium-ion batteries
| Autor: | Qingqing Han, Yijing Wang, Yuchang Si, Zewen Yang, Ting Jin, Kunjie Zhu, Lifang Jiao |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Carbon nanofiber Mechanical Engineering Metals and Alloys chemistry.chemical_element Nanoparticle 02 engineering and technology Current collector 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Exfoliation joint Electrospinning 0104 chemical sciences Anode chemistry Chemical engineering Mechanics of Materials Materials Chemistry Lithium 0210 nano-technology |
| Zdroj: | Journal of Alloys and Compounds. 793:646-652 |
| ISSN: | 0925-8388 |
| Popis: | Sn is considered as a promising anode for lithium-ion batteries due to its low cost and high theoretical capacity (992 mA h g −1 with Li4.4Sn). However, the volume expansion (∼300%) during lithiation/delithiation process can result in the continuous pulverization of active materials and exfoliation from current collector, deteriorating the capacity and cycling performance. Here Co/Co3SnC0.7 N-doped carbon nanofibers are successfully synthesized by a feasible electrospinning method. And the materials as the self-standing anode for lithium-ion batteries reveal a high-rate performance as delivering reversible capacities of 480 mA h g−1 at 100 mA g−1 and 290 mA h g−1 at 2000 mA g−1. In addition, the specific capacity can still maintain 320 mA h g−1 at 500 mA g−1 even after 900 cycles, showing the outstanding cycling stability. The inactive metal Co and one-dimensional N-doped carbon nanofibers synergistically promote the electrochemical performance of the Sn-based anode by inhibiting the aggregation of the nanoparticles and buffering volume variation during lithiation/delithiation process. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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