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).

中文翻译：

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皱折掺氮的MXene纳米片的轻松合成，作为锂硫电池的新型硫主体

通过新颖的一步法合成了具有强物理化学共吸附性的皱折的氮掺杂MXene纳米片，然后将其用作锂硫电池的新硫主体。氮掺杂策略可将杂原子引入MXene纳米片中，并同时引发定义明确的多孔结构，高表面积和大孔体积。所制得的氮掺杂MXene纳米片具有很强的物理和化学双重吸附能力，可以吸收多硫化物，并获得5.1 mg cm ^–2的高面积硫负荷。锂-硫电池基于皱折的氮掺杂MXene纳米片/硫复合材料，具有出色的电化学性能，包括高可逆容量（1144 mA hg ^–1在0.2C的速率下）和扩展的循环稳定性（1000个循环后，在2C下为610 mA hg ^–1）。