Melamine-based polymer networks enabled N, O, S Co-doped defect-rich hierarchically porous carbon nanobelts for stable and long-cycle Li-ion and Li-Se batteries
| Autor: | Liang Dan Chen, Wen Bei Yu, Hemdan S.H. Mohamed, Li-Hua Chen, Zhi-Yi Hu, Hai Ge Tan, Yu Li, Bao Lian Su, Wen Da Dong, Yun Jing Zhang, Zhao Deng, Jing Liu, Liang Wu, Fan Jie Xia |
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| Rok vydání: | 2021 |
| Předmět: |
Battery (electricity)
Materials science Heteroatom Li-ion batteries chemistry.chemical_element Melamine-based polymer networks 02 engineering and technology Electrolyte 010402 general chemistry Electrochemistry 01 natural sciences Energy storage Biomaterials Colloid and Surface Chemistry Hierarchically porous carbon nanobelts Defect-rich Fast channels Li-Se batteries 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Anode chemistry Chemical engineering Lithium 0210 nano-technology Carbon |
| Zdroj: | Journal of Colloid and Interface Science. 582:60-69 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2020.06.071 |
| Popis: | Li-Se battery is a promising energy storage candidate owing to its high theoretical volumetric capacity and safe operating condition. In this work, for the first time, we report using the whole organic Melamine-based porous polymer networks (MPNs) as a precursor to synthesize a N, O, S co-doped hierarchically porous carbon nanobelts (HPCNBs) for both Li-ion and Li-Se battery. The N, O, S co-doping resulting in the defect-rich HPCNBs provides fast transport channels for electrolyte, electrons and ions, but also effectively relieve volume change. When used for Li-ion battery, it exhibits an advanced lithium storage performance with a capacity of 345 mAh g−1 at 500 mA g−1 after 150 cycles and a superior rate capacity of 281 mAh g−1 even at 2000 mA g−1. Further density function theory calculations reveal that the carbon atoms adjacent to the doping sites are electron-rich and more effective to anchor active species in Li-Se battery. With the hierarchically porous channels and the strong dual physical–chemical confinement for Li2Se, the Se@ HPCNBs composite delivers an ultra-stable cycle performance even at 2 C after 1000 cycles. Our work here suggests that introduce of heteroatoms and defects in graphite-like anodes is an effective way to improve the electrochemical performance. |
| Databáze: | OpenAIRE |
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