Synthesis and characterization of three-dimensional MoS2@carbon fibers hierarchical architecture with high capacity and high mass loading for Li-ion batteries.
Synthesis and characterization of three-dimensional MoS2@carbon fibers hierarchical architecture with high capacity and high mass loading for Li-ion batteries.
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DOI：
10.1016/j.jcis.2017.09.078
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发表时间：
2018-01
影响因子：
9.9
通讯作者：
Xinyuan Shan;S. Zhang;N. Zhang;Yujin Chen;Hong Gao;Xitian Zhang
中科院分区：
文献类型：
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作者：
Xinyuan Shan;S. Zhang;N. Zhang;Yujin Chen;Hong Gao;Xitian Zhang
通过简单的水热法和随后的退火，成功地合成了三维（3D）MoS2@Carbon Fibers（CFs）分级结构。MoS 2纳米片生长在废旧棉布的碳化碳纤维上。该MoS2@CFs可以为电解质中的离子提供短的扩散路径，提高比表面积，并提高具有4.4 mg cm−2的高质量负载的3D MoS2@CFs分层结构的导电性。作为电极材料的3D MoS2@CFs分级结构可以实现高可逆面积容量（在2.5 mA cm-2下为5.2 mAh cm-2）并表现出优异的倍率性能。此外，碳纤维的制备是通过简单的碳化废棉，然后用作碳源，这是低成本和生态友好。我们还发现，在充电/放电过程中产生的Mo纳米粒子存在于循环过程中的分层结构，可以提高整个系统的导电性以及循环稳定性。因此，MoS2@CFs纳米复合材料作为电极材料在高性能锂离子电池中具有重要的应用潜力。
Three-dimensional (3D) MoS2@carbon fibers (CFs) hierarchical architectures are successfully synthesized via a simple hydrothermal method and subsequent annealing. MoS2nanoflakes are grown on the twine carbon fibers of the carbonized waste cotton cloth. The twine CFs can provide a short diffusion path for ions in electrolyte, enhance the specific surface area, and improve the conductivity of the 3D MoS2@CFs hierarchical architectures with high mass loading of 4.4 mg cm−2. The 3D MoS2@CFs hierarchical architectures as the electrode material can achieve a high reversible areal capacity (5.2 mAh cm−2at 2.5 mA cm−2) and exhibit an excellent rate performance. In addition, CFs are prepared by simply carbonizing the waste cotton and then used as carbon source, which is low-cost and eco-friendly. We also found that the Mo nanoparticles produced during the charge/discharge process exist in the hierarchical architectures during cycling and can improve the conductivity of the entire system as well as the cycling stability. Therefore, MoS2@CFs nanocomposites as electrode materials manifest a significant application potential for high-performance Li-ion batteries.