Monolayer MoS2–Graphene Hybrid Aerogels with Controllable Porosity for Lithium-Ion Batteries with High Reversible Capacity

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• 作者：Lianfu Jiang ; Binghui Lin ; Xiaoming Li ; Xiufeng Song ; Hui Xia ; Liang Li ; Haibo Zeng
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：February 3, 2016
• 年：2016
• 卷：8
• 期：4
• 页码：2680-2687
• 全文大小：564K
• ISSN：1944-8252

文摘

Monolayer MoS₂ nanosheets (NSs) are promising anode materials for lithium-ion batteries because all redox reactions take place at the surface without lithium-ion diffusion limit. However, the expanded band gap of monolayer MoS₂ NSs (～1.8 eV) compared to their bulk counterparts (～1.2 eV) and restacking tendency due to the van der Waals forces result in poor electron transfer and loss of the structure advantage. Here, a facile approach is developed to fabricate the MoS₂–graphene aerogels comprising controlled three-dimensional (3D) porous architectures constructed by interconnected monolayer MoS₂–graphene hybrid NSs. The robust 3D architectures combining with the monolayer feature of the hybrid NSs not only prevent the MoS₂ and graphene NSs from restacking, but also enable fast electrode kinetics due to the surface reaction mechanism and highly conductive graphene matrix. As a consequence, the 3D porous monolayer MoS₂–graphene composite aerogels exhibit a large reversible capacity up to 1200 mAh g^–1 as well as outstanding cycling stability and rate performance, making them promising as advanced anode materials for lithium-ion batteries.