Polymer wiring of insulating electrode materials: An approach to improve energy density of lithium-ion batteries

Basit Öğe Kaydı
dc.contributor.authorWang, Deyu
dc.contributor.authorEla, Sule Erten
dc.contributor.authorZakeeruddin, Shaik M.
dc.contributor.authorPechy, Peter
dc.contributor.authorExnarc, Ivan
dc.contributor.authorWang, Qing
dc.contributor.authorGraetzel, Michael
dc.date.accessioned2019-10-27T20:47:16Z
dc.date.available2019-10-27T20:47:16Z
dc.date.issued2009
dc.departmentEge Üniversitesien_US
dc.description.abstractThe poor electronic conductivity of LiFePO4 has been one of the major issues impeding it from achieving high power and energy density lithium-ion batteries. In this communication, a novel polymer-wiring concept was proposed to improve the conduction of the insulating electrode material. By using a polymer with tethered "swing" redox active molecules (S) attached on a polymer chain, as the standard redox potential of S matches closely the Fermi level of LiFePO4, electronic Communication between the redox molecule and LiFePO4 is established. Upon charging, S is oxidized at the current collector to S*, which then delivers the charge (holes) to the LiFePO4 particles by intermolecular hopping assisted by a "swing" - type motion of the shuttle molecule. And Li* is extracted. Upon discharging, the above process is just reversed. Preliminary studies with redox polymer consisting of poly (4-vinylpyridine) and phenoxazine moiety tethered with a C-12 alkyl chain have shown promising result with carbon-free LiFePO4, where effective electron exchange between the shuttle molecule and LiFePO4 has been observed. In addition, as the redox polymer itself could act as binder, we anticipate that the polymer-wiring concept would provide a viable approach to conducting-additive and binder free electrode for high energy density batteries. (c) 2009 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipCTI project; Faculty of Engineering, National University of SingaporeNational University of Singapore [R-284-000-064-133]en_US
dc.description.sponsorshipWe acknowledge financial support of this work by a CTI project (contract No. 7136.3 EPRP-IW). QW thanks Faculty of Engineering, National University of Singapore for a start-up Grant (No. R-284-000-064-133) support.en_US
dc.identifier.doi10.1016/j.elecom.2009.04.030
dc.identifier.endpage1352en_US
dc.identifier.issn1388-2481
dc.identifier.issn1873-1902
dc.identifier.issn1388-2481en_US
dc.identifier.issn1873-1902en_US
dc.identifier.issue7en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage1350en_US
dc.identifier.urihttps://doi.org/10.1016/j.elecom.2009.04.030
dc.identifier.urihttps://hdl.handle.net/11454/42522
dc.identifier.volume11en_US
dc.identifier.wosWOS:000268660200003en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Science Incen_US
dc.relation.ispartofElectrochemistry Communicationsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectBatteryen_US
dc.subjectLiFePO4en_US
dc.subjectRedox mediatoren_US
dc.titlePolymer wiring of insulating electrode materials: An approach to improve energy density of lithium-ion batteriesen_US
dc.typeArticleen_US

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu