Show simple item record

dc.contributor.authorAn, Hyosung
Mike, Jared
Smith, Kendall A.
Swank, Lisa
Lin, Yen-Hao
Pesek, Stacy L.
Verduzco, Rafael
Lutkenhaus, Jodie L.
dc.date.accessioned 2016-04-04T18:26:23Z
dc.date.available 2016-04-04T18:26:23Z
dc.date.issued 2015
dc.identifier.citation An, Hyosung, Mike, Jared, Smith, Kendall A., et al.. "Highly Flexible Self-Assembled V2O5 Cathodes Enabled by Conducting Diblock Copolymers." Scientific Reports, 5, (2015) Macmillan Publishers Limited: http://dx.doi.org/10.1038/srep14166.
dc.identifier.urihttps://hdl.handle.net/1911/88828
dc.description.abstract Mechanically robust battery electrodes are desired for applications in wearable devices, flexible displays, and structural energy and power. In this regard, the challenge is to balance mechanical and electrochemical properties in materials that are inherently brittle. Here, we demonstrate a unique water-based self-assembly approach that incorporates a diblock copolymer bearing electron- and ion-conducting blocks, poly(3-hexylthiophene)-block-poly(ethyleneoxide) (P3HT-b-PEO), with V2O5 to form a flexible, tough, carbon-free hybrid battery cathode. V2O5 is a promising lithium intercalation material, but it remains limited by its poor conductivity and mechanical properties. Our approach leads to a unique electrode structure consisting of interlocking V2O5 layers glued together with micellar aggregates of P3HT-b-PEO, which results in robust mechanical properties, far exceeding the those obtained from conventional fluoropolymer binders. Only 5 wt % polymer is required to triple the flexibility of V2O5, and electrodes comprised of 10 wt % polymer have unusually high toughness (293 kJ/m(3)) and specific energy (530 Wh/kg), both higher than reduced graphene oxide paper electrodes. Furthermore, addition of P3HT-b-PEO enhances lithium-ion diffusion, eliminates cracking during cycling, and boosts cyclability relative to V2O5 alone. These results highlight the importance of tradeoffs between mechanical and electrochemical performance, where polymer content can be used to tune both aspects.
dc.language.iso eng
dc.publisher Macmillan Publishers Limited
dc.rights This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material.
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.title Highly Flexible Self-Assembled V2O5 Cathodes Enabled by Conducting Diblock Copolymers
dc.type Journal article
dc.contributor.funder National Science Foundation
dc.contributor.funder Air Force Office of Scientific Research Young Investigator Research Program
dc.contributor.funder Kwanjeong Educational Foundation
dc.citation.journalTitle Scientific Reports
dc.citation.volumeNumber 5
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1038/srep14166
dc.identifier.pmcid PMC4585753
dc.identifier.pmid 26391053
dc.identifier.grantID 1336716 (National Science Foundation)
dc.identifier.grantID CBET-1336073 (National Science Foundation)
dc.identifier.grantID FA9550-13-1-0147 (Air Force Office of Scientific Research Young Investigator Research Program)
dc.type.publication publisher version


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material.
Except where otherwise noted, this item's license is described as This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material.