Sulfur Encapsulated in Mo4O11-Anchored Ultralight Graphene for High-Energy Lithium Sulfur Batteries

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• 作者：Lan Zhou ; Ning Ding ; Jin Yang ; Linlin Yang ; Yun Zong ; Zhaolin Liu ; Aishui Yu
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2016
• 出版时间：July 5, 2016
• 年：2016
• 卷：4
• 期：7
• 页码：3679-3687
• 全文大小：758K
• 年卷期：0
• ISSN：2168-0485

文摘

Mo₄O₁₁ nanoparticles were decorated onto ultralight graphene sheets (HRG) to form a Mo₄O₁₁/HRG precursor. Sulfur was then homogeneously dispersed onto the surface of Mo₄O₁₁/HRG by self-assembly from a sulfur/carbon disulfide solution to obtain a Mo₄O₁₁–HRG/S composite, which was used as the cathode material for a lithium sulfur battery. The morphologies and microstructures of the as-synthesized composites were characterized by electron microscopy and X-ray diffraction/photoelectron spectroscopy. Mo₄O₁₁ nanoparticles not only have a strong ability to adsorb to lithium polysulfides but also lead to a high Coulombic efficiency (96%). Furthermore, the incorporation of Mo₄O₁₁ on graphene improves the utilization of sulfur and enhances the cycling stability and rate capability of a Li–S battery.