Journal
ADVANCED ENERGY MATERIALS
Volume 8, Issue 13, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201702485
Keywords
lithium-sulfur batteries; MXene nanosheets; nitrogen-doping; porous structure
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Funding
- Australian Renewable Energy Agency (ARENA) project [ARENA 2014/RND106]
- China Scholarship Council (CSC)
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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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