Intercalating petroleum asphalt into electrospun ZnO/Carbon nanofibers as enhanced free-standing anode for lithium-ion batteries
| Autor: | Hui Ning, Hui Xie, Xiaobo Wang, Haoran Zhang, Qingshan Zhao, Shangyue Li, Jialiang Liu, Mingbo Wu, Luhai Wang, Yulong Zhu |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Carbon nanofiber Mechanical Engineering Metals and Alloys Polyacrylonitrile Oxide 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Electrospinning 0104 chemical sciences Anode chemistry.chemical_compound Carbon film chemistry Chemical engineering Mechanics of Materials Nanofiber Materials Chemistry 0210 nano-technology |
| Zdroj: | Journal of Alloys and Compounds. 737:330-336 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2017.12.091 |
| Popis: | In this study, we demonstrate novel 3D interconnected nanofiber films by intercalating petroleum asphalt into electrospun ZnO/carbon nanofibers (ZnO/CNFs-PA) as enhanced free-standing anode for lithium-ion batteries (LIBs). ZnO/CNFs composite is synthesized via one-step electrospinning of polyacrylonitrile and zinc acetate dehydrate. Through solvent impregnation and subsequent two-step thermal treatments, appropriate amount of petroleum asphalt (PA) is intercalated into ZnO/CNFs to generate a conductive carbon film between and around the nanofibers. Benefitting from the 3D conductive network established by the carbon nanofibers and PA-carbon layer, the as-prepared ZnO/CNFs-PA-1.0 film is evaluated as a free-standing LIBs anode and exhibits a promoted reversible capacity of 702 mA h g−1 at current density of 200 mA g−1, associating with excellent cycling stability and rate performance. Such novel nanostructure can effectively accommodate the volume expansion of ZnO, facilitate charge transfer and reinforce the electrode. The present strategy is believed to provide a feasible method to produce transition metal oxide/carbon nanofibers electrodes with superior electrochemical performance for LIBs. |
| Databáze: | OpenAIRE |
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