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Electrochemical Lithiation of Covalently Bonded Sulfur in Vulcanized Polyisoprene

Fu, Chengyin and Li, Guanghui and Zhang, Jian and Cornejo, Benjamin and Piao, Sophie S. and Bozhilov, Krassimir N. and Haddon, Robert C. and Guo, Juchen (2016) Electrochemical Lithiation of Covalently Bonded Sulfur in Vulcanized Polyisoprene. ACS Energy Letters, 2016 (1). pp. 115-120. ISSN 2380-8195. http://resolver.caltech.edu/CaltechAUTHORS:20160524-085704214

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Abstract

We report the synthesis of vulcanized polyisoprene (SPIP) nanowires and an investigation of the electrochemical lithiation mechanism of the covalently bonded sulfur bridges in SPIP. Electrochemical analysis demonstrates that the sulfur chains in SPIP have distinct electrochemical signatures from those that are characteristic of bulk elemental sulfur. The cyclic voltammetry and galvanostatic cycling data show a distinct multistep charge-transfer process and solid-state lithium–sulfur reaction behavior, and it is clear that this new material provides a promising basis for the development of cathodes for rechargeable batteries. Chemical changes due to the lithiation process are studied using Raman and X-ray photoelectron spectroscopy, on the basis of which new lithiation mechanisms of covalently bonded sulfur are proposed.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/acsenergylett.6b00073DOIArticle
http://pubs.acs.org/doi/abs/10.1021/acsenergylett.6b00073PublisherArticle
http://pubs.acs.org/doi/suppl/10.1021/acsenergylett.6b00073PublisherSupporting Information
Additional Information:© 2016 American Chemical Society. Received: April 18, 2016; Accepted: May 16, 2016; Publication Date (Web): May 16, 2016. This material is based upon work supported by Power Energy Solutions Inc. The authors declare no competing financial interest.
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Power Energy Solutions Inc.UNSPECIFIED
Record Number:CaltechAUTHORS:20160524-085704214
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160524-085704214
Official Citation:Electrochemical Lithiation of Covalently Bonded Sulfur in Vulcanized Polyisoprene Chengyin Fu, Guanghui Li, Jian Zhang, Benjamin Cornejo, Sophie S. Piao, Krassimir N. Bozhilov, Robert C. Haddon, and Juchen Guo ACS Energy Letters 2016 1 DOI: 10.1021/acsenergylett.6b00073
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:67290
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:24 May 2016 16:28
Last Modified:24 May 2016 16:28

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