Hybrid supercapacitor-battery materials for fast electrochemical charge storage

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dc.citation.firstpage4315en_US
dc.citation.journalTitleScientific Reportsen_US
dc.citation.volumeNumber4en_US
dc.contributor.authorVlad, A.en_US
dc.contributor.authorSingh, N.en_US
dc.contributor.authorRolland, J.en_US
dc.contributor.authorMelinte, S.en_US
dc.contributor.authorAjayan, P.M.en_US
dc.contributor.authorGohy, J.-F.en_US
dc.date.accessioned2014-04-14T20:56:35Zen_US
dc.date.available2014-04-14T20:56:35Zen_US
dc.date.issued2014en_US
dc.description.abstractHigh 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.en_US
dc.identifier.citationVlad, A., Singh, N., Rolland, J., et al.. "Hybrid supercapacitor-battery materials for fast electrochemical charge storage." <i>Scientific Reports,</i> 4, (2014) Nature: 4315. http://dx.doi.org/10.1038/srep04315.en_US
dc.identifier.doihttp://dx.doi.org/10.1038/srep04315en_US
dc.identifier.urihttps://hdl.handle.net/1911/75896en_US
dc.language.isoengen_US
dc.publisherNatureen_US
dc.rightsArticle 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.en_US
dc.titleHybrid supercapacitor-battery materials for fast electrochemical charge storageen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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