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Rational design of few-layered ReS2 nanosheets/N-doped mesoporous carbon nanocomposites for high-performance pseudocapacitive lithium storage
Chemical Engineering Journal ( IF 13.3 ) Pub Date : 2018-09-18 , DOI: 10.1016/j.cej.2018.09.132
Sheng Liu , Wanwan Lei , Yan Liu

A chemical vapor deposition-based two-step nanocasting process is employed to fabricate two different types of few-Layered ReS2 nanosheets/N-doped ordered mesoporous carbon CMK-3 nanocomposites: the ReS2 nanosheets are either confined within the channels of the N-doped CMK-3 or supported on the outside of the N-doped CMK-3. Siginificantly, the ReS2 nanosheets within the channels of N-doped CMK-3 delivers a much higher reversible capacity of 1175 mA h g−1 than does the ReS2 nanosheets on the external surface of N-doped CMK-3 (719 mA h g−1), and the superiority of the ReS2 nanosheets within the channels of N-doped CMK-3 is well demonstrated over the ReS2 nanosheets on the external surface of N-doped CMK-3, i.e., in terms of specific surface area, structural stability, lithium-ion and electron transport kinetics, capacitive charge storage, and the resulting high-performance lithium storage. This work clearly demonstrates the advantage of the few layered ReS2 within the channels of N-doped CMK-3 than on the external surface of N-doped CMK-3 as an anode material in lithium-ion batteries, and meanwhile provides new insight into the rational design of the transition metal dichalcogenides/porous carbon nanocomposites for electrochemical energy storage.



中文翻译:

几层ReS 2纳米片/ N掺杂的中孔碳纳米复合材料的合理设计,用于高性能假电容锂存储

基于化学气相沉积的两步纳米铸造工艺可用于制造两种不同类型的少层ReS 2纳米片/ N掺杂有序介孔碳CMK-3纳米复合材料:ReS 2纳米片要么被限制在N的通道内掺杂的CMK-3或在掺杂N的CMK-3的外部受支持。Siginificantly,所述RE 2个N掺杂CMK-3的通道内纳米片提供的1175毫安ħg的高得多的可逆容量-1比该RES 2个上的N型掺杂CMK-3(719毫安ħ克外表面纳米片- 1),与ReS相比,ReS 2纳米片在N掺杂CMK-3通道内的优越性得到了充分证明N掺杂的CMK-3外表面上的2个纳米片,在比表面积,结构稳定性,锂离子和电子传输动力学,电容性电荷存储以及所得的高性能锂存储方面。这项工作清楚地证明了N掺杂的CMK-3通道中的多层ReS 2优于N掺杂的CMK-3的外表面作为锂离子电池的负极材料的优势,同时为了解锂离子电池提供了新的见解。过渡金属二卤化物/多孔碳纳米复合材料的合理设计,用于电化学储能。

更新日期:2018-09-18
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