Cation-dependent Stabilization Of Electrogenerated Naphthalene Diimide Dianions In Porous Polymer Thin Films And Their Application To Electrical Energy Storage.

dc.creatorDeBlase, Catherine R
dc.creatorHernández-Burgos, Kenneth
dc.creatorRotter, Julian M
dc.creatorFortman, David J
dc.creatorAbreu, Dieric dos S
dc.creatorTimm, Ronaldo A
dc.creatorDiógenes, Izaura C N
dc.creatorKubota, Lauro T
dc.creatorAbruña, Héctor D
dc.creatorDichtel, William R
dc.date2015-Nov
dc.date2016-05-23T19:41:02Z
dc.date2016-05-23T19:41:02Z
dc.date.accessioned2018-03-29T01:28:33Z
dc.date.available2018-03-29T01:28:33Z
dc.identifierAngewandte Chemie (international Ed. In English). v. 54, n. 45, p. 13225-13229, 2015-Nov.
dc.identifier1521-3773
dc.identifier10.1002/anie.201505289
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/?term=26355871
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/235435
dc.identifier26355871
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1303678
dc.descriptionPorous polymer networks (PPNs) are attractive materials for capacitive energy storage because they offer high surface areas for increased double-layer capacitance, open structures for rapid ion transport, and redox-active moieties that enable faradaic (pseudocapacitive) energy storage. Here we demonstrate a new attractive feature of PPNs--the ability of their reduced forms (radical anions and dianions) to interact with small radii cations through synergistic interactions arising from densely packed redox-active groups, only when prepared as thin films. When naphthalene diimides (NDIs) are incorporated into PPN films, the carbonyl groups of adjacent, electrochemically generated, NDI radical anions and dianions bind strongly to K(+), Li(+), and Mg(2+), shifting the formal potentials of NDI's second reduction by 120 and 460 mV for K(+) and Li(+)-based electrolytes, respectively. In the case of Mg(2+), NDI's two redox waves coalesce into a single two-electron process with shifts of 240 and 710 mV, for the first and second reductions, respectively, increasing the energy density by over 20 % without changing the polymer backbone. In contrast, the formal reduction potentials of NDI derivatives in solution are identical for each electrolyte, and this effect has not been reported for NDI previously. This study illustrates the profound influence of the solid-state structure of a polymer on its electrochemical response, which does not simply reflect the solution-phase redox behavior of its monomers.
dc.description54
dc.description13225-13229
dc.languageeng
dc.relationAngewandte Chemie (international Ed. In English)
dc.relationAngew. Chem. Int. Ed. Engl.
dc.rightsembargo
dc.sourcePubMed
dc.subjectElectrical Energy Storage Devices
dc.subjectElectrochemistry
dc.subjectPorous Polymers
dc.subjectRedox Processes
dc.subjectSupercapacitors
dc.titleCation-dependent Stabilization Of Electrogenerated Naphthalene Diimide Dianions In Porous Polymer Thin Films And Their Application To Electrical Energy Storage.
dc.typeArtículos de revistas


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