In Situ Nitrogen Retention of Carbon Anode for Enhancing the Electrochemical Performance for Sodium-Ion Battery |
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| Authors: | Hui Shi Ziheng Wang Dr Qin Ouyang Prof Jianwei Hao Dr Xianbo Huang |
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| Institution: | 1. National Engineering Technology Research Centre of Flame Retardant Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081 P. R. China;2. Beijing Kay Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081 P. R. China;3. National Engineering Laboratory for Carbon Fibre Preparation Technology, Ningbo Institute of Material Technology & Engineering, Chinese Academy of Science, Ningbo, 315201 P. R. China;4. Kingfa Science & Technology Company, Guangzhou, 510520 P. R. China |
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| Abstract: | Retaining nitrogen for polyacrylonitrile (PAN) based carbon anode is a cost-effective way to make full use of the advantages of PAN for sodium-ion batteries (SIBs). Here, a simple strategy has been successfully adopted to retain N atoms in situ and increase production yield of a novel composite PAZ by mixing 3 wt % of zinc borate (ZB) with poly (acrylonitrile-co-itaconic acid) (PANIA). Among the prepared carbonised fibre (CF) samples, PAZ-CF-700 maintains the highest N content, retaining 90 % of the original N from PANIA. It represents the highest capacity storage contribution (80.55 %) and the lowest impedance Rct (117 Ω). Consequently, the specific capacity increases from 60 mAh g−1 of PANIA-CF-700 to 190 mAh g−1 of PAZ-CF-700 at a current density of 100 mA g−1. At the same time, PAZ-CF-700 exhibits a good rate performance and excellent long-term cycling stability with a specific capacity of 94 mAh g−1 after 4000 cycles at 1.6 A g−1. |
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| Keywords: | polyacrylonitrile nitrogen retention zinc borate carbon anode sodium-ion battery |
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