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Published May 16, 2016 | Supplemental Material
Journal Article Open

Electrochemical Lithiation of Covalently Bonded Sulfur in Vulcanized Polyisoprene

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.

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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August 20, 2023
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