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dc.contributor.authorVlad, A.
Singh, N.
Rolland, J.
Melinte, S.
Ajayan, P.M.
Gohy, J.-F.
dc.date.accessioned 2014-04-14T20:56:35Z
dc.date.available 2014-04-14T20:56:35Z
dc.date.issued 2014
dc.identifier.citation Vlad, A., Singh, N., Rolland, J., et al.. "Hybrid supercapacitor-battery materials for fast electrochemical charge storage." Scientific Reports, 4, (2014) Nature: 4315. http://dx.doi.org/10.1038/srep04315.
dc.identifier.urihttps://hdl.handle.net/1911/75896
dc.description.abstract High energy and high power electrochemical energy storage devices rely on different fundamental working principles - bulk vs. surface ion diffusion and electron conduction. Meeting both characteristics within a single or a pair of materials has been under intense investigations yet, severely hindered by intrinsic materials limitations. Here, we provide a solution to this issue and present an approach to design high energy and high power battery electrodes by hybridizing a nitroxide-polymer redox supercapacitor (PTMA) with a Li-ion battery material (LiFePO4). The PTMA constituent dominates the hybrid battery charge process and postpones the LiFePO4 voltage rise by virtue of its ultra-fast electrochemical response and higher working potential. We detail on a unique sequential charging mechanism in the hybrid electrode: PTMA undergoes oxidation to form high-potential redox species, which subsequently relax and charge the LiFePO4 by an internal charge transfer process. A rate capability equivalent to full battery recharge in less than 5 minutes is demonstrated. As a result of hybrid?s components synergy, enhanced power and energy density as well as superior cycling stability are obtained, otherwise difficult to achieve from separate constituents.
dc.language.iso eng
dc.publisher Nature
dc.rights Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.title Hybrid supercapacitor-battery materials for fast electrochemical charge storage
dc.type Journal article
dc.contributor.funder Advance Energy Consortium
dc.citation.journalTitle Scientific Reports
dc.citation.volumeNumber 4
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1038/srep04315
dc.identifier.pmcid PMC3945924
dc.identifier.pmid 24603843
dc.type.publication publisher version
dc.citation.firstpage 4315


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