Facile Synthesis of Crumpled Nitrogen‐Doped MXene Nanosheets as a New Sulfur Host for Lithium–Sulfur Batteries |
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| Authors: | Weizhai Bao Lin Liu Chengyin Wang Sinho Choi Dan Wang Guoxiu Wang |
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| Affiliation: | 1. Centre for Clean Energy Technology, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia;2. College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, China;3. Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Zhong Guancun, Beijing, China |
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| Abstract: | Crumpled nitrogen‐doped MXene nanosheets with strong physical and chemical coadsorption of polysulfides are synthesized by a novel one‐step approach and then utilized as a new sulfur host for lithium–sulfur batteries. The nitrogen‐doping strategy enables introduction of heteroatoms into MXene nanosheets and simultaneously induces a well‐defined porous structure, high surface area, and large pore volume. The as‐prepared nitrogen‐doped MXene nanosheets have a strong capability of physical and chemical dual‐adsorption for polysulfides and achieve a high areal sulfur loading of 5.1 mg cm–2. Lithium–sulfur batteries, based on crumpled nitrogen‐doped MXene nanosheets/sulfur composites, demonstrate outstanding electrochemical performances, including a high reversible capacity (1144 mA h g–1 at 0.2C rate) and an extended cycling stability (610 mA h g–1 at 2C after 1000 cycles). |
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| Keywords: | lithium– sulfur batteries MXene nanosheets nitrogen‐doping porous structure |
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