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Facile Synthesis of Crumpled Nitrogen‐Doped MXene Nanosheets as a New Sulfur Host for Lithium–Sulfur Batteries
Author(s) -
Bao Weizhai,
Liu Lin,
Wang Chengyin,
Choi Sinho,
Wang Dan,
Wang Guoxiu
Publication year - 2018
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201702485
Subject(s) - heteroatom , sulfur , materials science , electrochemistry , lithium (medication) , nitrogen , chemical engineering , doping , adsorption , inorganic chemistry , nanotechnology , electrode , organic chemistry , chemistry , medicine , optoelectronics , engineering , metallurgy , endocrinology , ring (chemistry)
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).