Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 18, Pages 10147-10154Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202016608
Keywords
Li-S battery; metal– organic frameworks; mixed matrix membranes; stepped channel separators
Categories
Funding
- NSFC [21871141, 21871142, 21701085, 21901122]
- NSF of Jiangsu Province of China [BK20171032]
- Natural Science Research of Jiangsu Higher Education Institutions of China [17KJB150025, 19KJB150011]
- China Postdoctoral Science Foundation [2018M630572, 2019M651873]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Foundation of Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
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By utilizing a photoinduced heat-assisted processing strategy, multidimensional devices with MOFs have been successfully fabricated, including a triple-layer separator with stepped-channels that showed superior specific capacity and cycling performance compared to other types of separators, which may accelerate the development of MOF-based membranes and expand the application of MOFs in energy-storage technologies.
Multidimensional fabrication of metal-organic frameworks (MOFs) into multilevel channel integrated devices are in high demanded for Li-S separators. Such separators have advantages in pore-engineering that might fulfill requirements such as intercepting the diffusing polysulfides and improving the Li+/electrolyte transfer in Li-S batteries. However, most reported works focus on the roles of MOFs as ionic sieves for polysulfides while offering limited investigation on the tuning of Li+ transfer across the separators. A photoinduced heat-assisted processing strategy is proposed to fabricate MOFs into multidimensional devices (e.g., hollow/Janus fibers, double-or triple-layer membranes). For the first time, a triple-layer separator with stepped-channels has been designed and demonstrated as a powerful separator with outstanding specific capacity (1365.0 mAh g(-1)) and cycling performance (0.03 % fading per cycle from 100(th) to 700(th) cycle), which is superior to single/double-layer and commercial separators. The findings may expedite the development of MOF-based membranes and extend the scope of MOFs in energy-storage technologies.
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