材料科学
碳纳米纤维
石墨烯
复合材料
碳纳米管
化学气相渗透
阴极
碳纤维
纳米纤维
化学气相沉积
电解质
复合数
纳米技术
电极
化学
物理化学
作者
Xiaojun Yan,Huan Zhang,Meiling Huang,Weishang Jia,Yuchen Jiang,Tao Chen,Meizhen Qu
标识
DOI:10.1016/j.diamond.2022.108888
摘要
Lithium‑sulfur (Li-S) batteries have been hindered by the difficulty of achieving satisfactory cycling stability of high sulfur loading owing to the structural instability and exaggerated shuttle problem. Here, we design and fabricate a “reinforced concrete” structure based on the carbon fibers (CFs) supporting graphene/carbon nanotubes (GC) matrix composites, followed by a slurry-casting process to produce the final CFs-S/GC cathode with 4.5– 5.5 mg cm−2 sulfur loading. The 3D architecture of the micro/nano-hybrid materials enhances the structural strength and builds an interconnected conductive network for efficient electrolyte infiltration and the rapid electric/ionic transport. Furthermore, carbon nanofibers (CNFs) are growth on the surface of CFs by chemical vapor deposition to formation of [email protected] The [email protected]/GC cathode enables the effective confines of polysulfides on electrochemically active sites, leading to a much-improved cycling performance. The strategy reported in this paper provides a feasible way for the construction of CFs or modified CFs skeleton in nanostructured carbon materials for high energy density Li-S batteries.
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