From Dispersed Microspheres to Interconnected Nanospheres: Carbon-Sandwiched Monolayered MoS2 as High-Performance Anode of Li-Ion Batteries

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• 作者：Jie Shao ; Qunting Qu ; Zhongming Wan ; Tian Gao ; Zhichen Zuo ; Honghe Zheng
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：October 21, 2015
• 年：2015
• 卷：7
• 期：41
• 页码：22927-22934
• 全文大小：534K
• ISSN：1944-8252

文摘

Hierarchical structured carbon@MoS₂ (C@MoS₂) microspheres and nanospheres composed of carbon-sandwiched monolayered MoS₂ building blocks are synthesized through a facile one-pot polyvinylpyrrolidone (PVP) micelle-assisted hydrothermal route. The dimension and carbon content of C@MoS₂ spheres are effectively controlled by singly adjusting the concentration of PVP, which plays the dual functions of soft-template and carbon source. As the anode materials of Li-ion batteries, C@MoS₂ nanospheres present considerably higher capacity, better rate behavior and cycling stability than C@MoS₂ microspheres. The reasons are attributed to the unique interconnected nanospherical morphology and the internal hierarchical construction of C@MoS₂ nanospheres with expanded MoS₂/carbon interlayer spacing.