Cobalt doped JUC-160 derived functional carbon superstructures with synergetic catalyst effect for Li-SeS2 batteries
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Accepted Version
Supplementary Data
Date
2020-07-03
Authors
Jin, Wen-wu
Li, He-Jun
Zou, Ji-zhao
Zhang, Qi
Inguva, Saikumar
Zeng, Shao-zhong
Xu, Guo-zhong
Zeng, Xie-rong
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier B.V.
Published Version
Abstract
The carbon nanostructures with polar metal/heteroatom co-doping are considered as an effective strategy to improve their electrochemical performances. In this context, the crystal-shape engineering is carried out. Based on a new ‘‘one for six’’ strategy, the JUC-160 having a two-dimensional (2D) zeolitic imidazolate framework is transformed into six different carbon materials. These materials do not need a carbon activation process or template removal process. Instead, after a simple carbonization, a series of metal/heteroatom co-doped carbon materials with novel structures are formed. To be highlighted, this work is the first report of using self-assembled carbon nanostructures/SeS2 composites as cathode materials in the field of Li-SeS2. Moreover, those carbon nanostructures can be effectively tailored by adjusting the method of cobalt doping and the amount of cobalt dopant. Because of the benefits from the novel structures and cobalt/nitrogen co-doping, the dissolution of poly-sulfides/selenides is reduced and a high content of SeS2 (73 wt%) is achieved. The optimized cathode displays an extraordinary cycle performance with a reversible capacity of 820.87 mA h g−1 after 100 cycles, and with reversible charge-discharge efficiency is close to 100%
Description
Keywords
Cobalt-doped , ZIF , Self-assembled , Crystal-shape engineering , Li-SeS2
Citation
Jin, W.-W., Li, H.-J., Zou, J.-Z., Zhang, Q., Inguva, S., Zeng, S.-Z., Xu, G.-Z. and Zeng, X.-R. (2020) 'Cobalt doped JUC-160 derived functional carbon superstructures with synergetic catalyst effect for Li-SeS2 batteries', Microporous and Mesoporous Materials, 306, 110438 (11pp). doi: 10.1016/j.micromeso.2020.110438