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Article: A mechanochemical synthesis of submicron-sized Li2S and a mesoporous Li2S/C hybrid for high performance lithium/sulfur battery cathodes

TitleA mechanochemical synthesis of submicron-sized Li<inf>2</inf>S and a mesoporous Li<inf>2</inf>S/C hybrid for high performance lithium/sulfur battery cathodes
Authors
Issue Date2017
Citation
Journal of Materials Chemistry A, 2017, v. 5, n. 14, p. 6471-6482 How to Cite?
Abstract© The Royal Society of Chemistry. Lithium sulfide, Li2S, is a promising cathode material for lithium-sulfur batteries (LSBs), with a high theoretical capacity of 1166 mA h g-1. However, it suffers from low cycling stability, low-rate capability and high initial activation potential. In addition, commercially available Li2S is of high cost and of large size, over ten microns, which further exacerbate its shortcomings as a sulfur cathode. Exploring new approaches to fabricate small-sized Li2S of low cost and to achieve Li2S cathodes of high electrochemical performance is highly desired. This work reports a novel mechanochemical method for synthesizing Li2S of high purity and submicron size by ball-milling LiH with sulfur in an Ar atmosphere at room temperature. By further milling the as-synthesized Li2S with polyacrylonitrile (PAN) followed by carbonization of PAN at 1000 °C, a Li2S/C hybrid with nano-sized Li2S embedded in a mesoporous carbon matrix is achieved. The hybrid with Li2S as high as 74 wt% shows a high initial capacity of 971 mA h g-1at 0.1C and retains a capacity of 570 mA h g-1after 200 cycles as a cathode material for LSBs. A capacity of 610 mA h g-1is obtained at 1C. The synthesis method of Li2S is facile, environmentally benign, and of high output and low cost. The present work opens a new route for the scalable fabrication of submicron-sized Li2S and for the development of high performance Li2S-based cathodes.
Persistent Identifierhttp://hdl.handle.net/10722/262889
ISSN
2023 Impact Factor: 10.7
2023 SCImago Journal Rankings: 2.804
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLi, Xiang-
dc.contributor.authorGao, Mingxia-
dc.contributor.authorDu, Wubin-
dc.contributor.authorNi, Bo-
dc.contributor.authorWu, Yuanhe-
dc.contributor.authorLiu, Yongfeng-
dc.contributor.authorShang, Congxiao-
dc.contributor.authorGuo, Zhengxiao-
dc.contributor.authorPan, Hongge-
dc.date.accessioned2018-10-08T09:28:43Z-
dc.date.available2018-10-08T09:28:43Z-
dc.date.issued2017-
dc.identifier.citationJournal of Materials Chemistry A, 2017, v. 5, n. 14, p. 6471-6482-
dc.identifier.issn2050-7488-
dc.identifier.urihttp://hdl.handle.net/10722/262889-
dc.description.abstract© The Royal Society of Chemistry. Lithium sulfide, Li2S, is a promising cathode material for lithium-sulfur batteries (LSBs), with a high theoretical capacity of 1166 mA h g-1. However, it suffers from low cycling stability, low-rate capability and high initial activation potential. In addition, commercially available Li2S is of high cost and of large size, over ten microns, which further exacerbate its shortcomings as a sulfur cathode. Exploring new approaches to fabricate small-sized Li2S of low cost and to achieve Li2S cathodes of high electrochemical performance is highly desired. This work reports a novel mechanochemical method for synthesizing Li2S of high purity and submicron size by ball-milling LiH with sulfur in an Ar atmosphere at room temperature. By further milling the as-synthesized Li2S with polyacrylonitrile (PAN) followed by carbonization of PAN at 1000 °C, a Li2S/C hybrid with nano-sized Li2S embedded in a mesoporous carbon matrix is achieved. The hybrid with Li2S as high as 74 wt% shows a high initial capacity of 971 mA h g-1at 0.1C and retains a capacity of 570 mA h g-1after 200 cycles as a cathode material for LSBs. A capacity of 610 mA h g-1is obtained at 1C. The synthesis method of Li2S is facile, environmentally benign, and of high output and low cost. The present work opens a new route for the scalable fabrication of submicron-sized Li2S and for the development of high performance Li2S-based cathodes.-
dc.languageeng-
dc.relation.ispartofJournal of Materials Chemistry A-
dc.titleA mechanochemical synthesis of submicron-sized Li<inf>2</inf>S and a mesoporous Li<inf>2</inf>S/C hybrid for high performance lithium/sulfur battery cathodes-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1039/c7ta00557a-
dc.identifier.scopuseid_2-s2.0-85017149322-
dc.identifier.volume5-
dc.identifier.issue14-
dc.identifier.spage6471-
dc.identifier.epage6482-
dc.identifier.eissn2050-7496-
dc.identifier.isiWOS:000398323400016-
dc.identifier.issnl2050-7496-

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