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- Pengbiao Geng
- School of Chemistry and Chemical Engineering Yangzhou University Yangzhou Jiangsu 225009 P. R. China
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- Lei Wang
- Department of Chemical Engineering School of Environmental and Chemical Engineering Shanghai University 99 Shangda Road Shanghai 200444 P. R. China
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- Meng Du
- School of Chemistry and Chemical Engineering Yangzhou University Yangzhou Jiangsu 225009 P. R. China
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- Yang Bai
- School of Chemistry and Chemical Engineering Yangzhou University Yangzhou Jiangsu 225009 P. R. China
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- Wenting Li
- School of Chemistry and Chemical Engineering Yangzhou University Yangzhou Jiangsu 225009 P. R. China
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- Yanfang Liu
- National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province Huaiyin Institute of Technology Huaian Jiangsu 223003 China
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- Shuangqiang Chen
- Department of Chemical Engineering School of Environmental and Chemical Engineering Shanghai University 99 Shangda Road Shanghai 200444 P. R. China
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- Pierre Braunstein
- Université de Strasbourg CNRS CHIMIE UMR 7177 4 rue Blaise Pascal Laboratoire de Chimie de Coordination Strasbourg Cedex 67081 France
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- Qiang Xu
- School of Chemistry and Chemical Engineering Yangzhou University Yangzhou Jiangsu 225009 P. R. China
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- Huan Pang
- School of Chemistry and Chemical Engineering Yangzhou University Yangzhou Jiangsu 225009 P. R. China
抄録
<jats:title>Abstract</jats:title><jats:p>Metal–organic frameworks (MOFs) with controllable shapes and sizes show a great potential in Li–S batteries. However, neither the relationship between shape and specific capacity nor the influence of MOF particle size on cyclic stability have been fully established yet. Herein, MIL‐96‐Al with various shapes, forming hexagonal platelet crystals (HPC), hexagonal bipyramidal crystals (HBC), and hexagonal prismatic bipyramidal crystals (HPBC) are successfully prepared via cosolvent methods. Density functional theory (DFT) calculations demonstrate that the HBC shape with highly exposed (101) planes can effectively adsorb lithium polysulfides (LPS) during the charge/discharge process. By changing the relative proportion of the cosolvents, HBC samples with different particle sizes are prepared. When these MIL‐96‐Al crystals are used as sulfur host materials, it is found that those with a smaller size of the HBC shape deliver higher initial capacity. These investigations establish that different crystal planes have different adsorption abilities for LPS, and that the MOF particle size should be considered for a suitable sulfur host. More broadly, this work provides a strategy for designing sulfur hosts in Li–S batteries.</jats:p>
収録刊行物
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- Advanced Materials
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Advanced Materials 34 (4), 2107836-, 2021-12-08
Wiley