多硫化物
气凝胶
吸附
杯芳烃
复合数
硫黄
碳纤维
锂(药物)
材料科学
化学工程
电化学
多孔性
阴极
无机化学
化学
纳米技术
电极
有机化学
分子
复合材料
物理化学
电解质
内分泌学
工程类
医学
作者
Xingchi Zhang,Xueliang Li,Wei Gao,Li Ma,Huagao Fang,Yizhen Shu,Jinjin Ye,Yunsheng Ding
标识
DOI:10.1002/cplu.201900554
摘要
Abstract A cage‐type composite was successfully prepared by attaching p ‐sulfonatocalix[4]arene to a porous activated carbon aerogel (ACA). The resulting composite showed a high specific surface area of 1620.7 m 2 g −1 and a high sulfur loading of 2.5 mg cm −2 . The calixarene is uniformly dispersed on the carbon spheres and efficiently captures polysulfides by interaction with the sulfonate groups. Meanwhile, the cross‐linked porous structure of the composite restricts the migration of polysulfides. The cathode delivers an outstanding electrochemical performance with an initial capacity of 1304.7 mAh g −1 at 0.2 C. Furthermore, it displays excellent long‐term cycling stability, maintaining 884.7 mAh g −1 after 300 cycles at 0.5 C. Density functional theory (DFT) adsorption calculations support the strong interaction between the calixarenes and polysulfides and reveal the capture mechanism.
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