Self-Doped Conjugated Polymeric Binders Improve the Capacity and Mechanical Properties of V2O5 Cathodes

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dc.citation.articleNumber589
dc.citation.issueNumber4
dc.citation.journalTitlePolymers
dc.citation.volumeNumber11
dc.contributor.authorLi, Xiaoyi
dc.contributor.authorAn, Hyosung
dc.contributor.authorStrzalka, Joseph
dc.contributor.authorLutkenhaus, Jodie
dc.contributor.authorVerduzco, Rafael
dc.date.accessioned2019-12-12T17:25:38Z
dc.date.available2019-12-12T17:25:38Z
dc.date.issued2019
dc.description.abstractPolymeric binders serve to stabilize the morphology of electrodes by providing adhesion and binding between the various components. Successful binders must serve multiple functions simultaneously, including providing strong adhesion, improving conductivity, and providing electrochemical stability. A tradeoff between mechanical integrity and electrochemical performance in binders for lithium-ion batteries is one of the many challenges of improving capacity and performance. In this paper, we demonstrate a self-doped conjugated polymer, poly(9,9-bis(4′-sulfonatobutyl)fluorene-alt-co-1,4-phenylene) (PFP), which not only provides mechanical robustness but also improves electrode stability at temperatures as high as 450 °C. The self-doped PFP polymer is comprised of a conjugated polyfluorene backbone with sulfonate terminated side-chains that serve to dope the conjugated polymer backbone, resulting in stable conductivity. Composite electrodes are prepared by blending PFP with V2O5 in water, followed by casting and drying. Structural characterization with X-ray diffraction and wide-angle X-ray scattering shows that PFP suppresses the crystallization of V2O5 at high temperatures (up to 450 °C), resulting in improved electrode stability during cycling and improved rate performance. This study demonstrates the potential of self-doped conjugated polymers for use as polymeric binders to enhance mechanical, structural, and electrochemical properties.
dc.identifier.citationLi, Xiaoyi, An, Hyosung, Strzalka, Joseph, et al.. "Self-Doped Conjugated Polymeric Binders Improve the Capacity and Mechanical Properties of V2O5 Cathodes." <i>Polymers,</i> 11, no. 4 (2019) MDPI: https://doi.org/10.3390/polym11040589.
dc.identifier.digitalpolymers-11-00589
dc.identifier.doihttps://doi.org/10.3390/polym11040589
dc.identifier.urihttps://hdl.handle.net/1911/107888
dc.language.isoeng
dc.publisherMDPI
dc.rightsThis is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject.keywordconjugated polymer
dc.subject.keywordself-doped polymer
dc.subject.keywordlithium-ion battery
dc.subject.keywordconductive binder
dc.subject.keywordvanadium pentoxide
dc.titleSelf-Doped Conjugated Polymeric Binders Improve the Capacity and Mechanical Properties of V2O5 Cathodes
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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