Journal
CHINESE CHEMICAL LETTERS
Volume 31, Issue 9, Pages 2347-2352Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2020.04.014
Keywords
Lithium sulfur battery; Co/Zn-ZIF; Nitrogen-doped carbons; Catalyst; Separator modification
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Funding
- National Natural Science Foundation of China [51822205, 21875121, 51602218, 51972231]
- Ministry of Science and Technology of China [2017YFA0206700]
- Ministry of Education of China [B12015]
- Natural Science Foundation of Tianjin Municipal Science and Technology Commission [18JCQNJC02400]
- Science & Technology Development Fund of Tianjin Education Commission for Higher Education [2017KJ248]
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Lithium-sulfur (Li-S) batteries have received extensive attention due to their high theoretical specific energy density. However, the utilization of sulfur is seriously reduced by the shuttle effect of lithium polysulfides and the low conductivity of sulfur and lithium sulfide (Li2S). Herein, we introduced bimetalorganic frameworks (Co/Zn-ZIF) derived cobalt and nitrogen-doped carbons (Co/N-C) into Li-S batteries through host design and separator modification. The Co/N-C in Li-S batteries effectively limits the shuttle effect through simultaneously serving as polysulfide traps and chemical catalyst. As a result, the Li-S batteries deliver a high reversible capacity of 1614.5 mAh/g and superior long-term cycling stability with a negligible capacity decay of only 0.04% per cycle after 1000 cycles. Furthermore, they have a high area capacity of 5.5 mAh/cm(2). (C) 2020 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
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