https://scholars.lib.ntu.edu.tw/handle/123456789/409033
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.author | Weng Y.-T. | en_US |
dc.contributor.author | Pan H.-A. | en_US |
dc.contributor.author | Lee R.-C. | en_US |
dc.contributor.author | Huang T.-Y. | en_US |
dc.contributor.author | Chu Y. | en_US |
dc.contributor.author | Lee J.-F. | en_US |
dc.contributor.author | Sheu H.-S. | en_US |
dc.contributor.author | Wu N.-L. | en_US |
dc.creator | Sheu H.-S.;Lee J.-F.;Chu Y.;Huang T.-Y.;Lee R.-C.;Pan H.-A.;Weng Y.-T.;Wu N.-L. | - |
dc.date.accessioned | 2019-05-17T04:56:39Z | - |
dc.date.available | 2019-05-17T04:56:39Z | - |
dc.date.issued | 2015 | - |
dc.identifier.issn | 16146832 | - |
dc.identifier.uri | https://scholars.lib.ntu.edu.tw/handle/123456789/409033 | - |
dc.description.abstract | Mn oxides are highly important electrode materials for aqueous electrochemical energy storage devices, including batteries and supercapacitors. Although MnO<inf>2</inf> is a promising pseudocapacitor material because of its outstanding rate and capacity performance, its electrochemical instability in aqueous electrolyte prevents its use at low electrochemical potential. Here, the possibility of stabilizing MnO<inf>2</inf> electrode using SiO<inf>2</inf>-confined nanostructure is demonstrated. Remarkably, an exceptionally good electrochemical stability under large negative polarization in aqueous (Li<inf>2</inf>SO<inf>4</inf>) electrolyte, usually unattainable for MnO<inf>2</inf>-based electrode, is achieved. Even more interestingly, this MnO<inf>2</inf>-SiO<inf>2</inf> nanostructured composite exhibits unique mixed pseudocapacitance-battery behaviors involving consecutive reversible charge transfer from Mn(IV) to Mn(II), which enable simultaneous high-capacity and high-rate characteristics, via different charge-transfer kinetic mechanisms. This suggests a strategy to design and stabilize electrochemical materials that are comprised of intrinsically unstable but high-performing component materials. The possibility of stabilizing MnO <inf>2</inf> electrode using a SiO <inf>2</inf> -confined nanostructure, which exhibits exceptionally good electrochemical stability under large negative polarization in aqueous electrolyte, is demonstrated. The nanostructured composite exhibits unique mixed pseudocapacitance-battery behaviors involving consecutive reversible charge transfer from Mn(IV) to Mn(II). A strategy to design and stabilize electrochemical materials that are composed of intrinsically unstable but high-performing component materials is suggested. ? 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. | - |
dc.language | English | - |
dc.relation.ispartof | Advanced Energy Materials | en_US |
dc.subject | batteries | - |
dc.subject | charge transfer mechanism | - |
dc.subject | confined nanostructure | - |
dc.subject | manganese oxide | - |
dc.subject | pseudocapacitors | - |
dc.title | Spatially Confined MnO<inf>2</inf> Nanostructure Enabling Consecutive Reversible Charge Transfer from Mn(IV) to Mn(II) in a Mixed Pseudocapacitor-Battery Electrode | en_US |
dc.type | journal article | en |
dc.identifier.doi | 10.1002/aenm.201500772 | - |
dc.identifier.scopus | 2-s2.0-84942938373 | - |
dc.identifier.url | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84942938373&doi=10.1002%2faenm.201500772&partnerID=40&md5=52c8f45b2a80f1293fab19ad4ec7a7db | - |
dc.relation.journalvolume | 5 | - |
dc.relation.journalissue | 18 | - |
item.openairetype | journal article | - |
item.openairecristype | http://purl.org/coar/resource_type/c_6501 | - |
item.cerifentitytype | Publications | - |
item.fulltext | no fulltext | - |
item.grantfulltext | none | - |
crisitem.author.dept | Chemical Engineering | - |
crisitem.author.orcid | 0000-0001-6545-8790 | - |
crisitem.author.parentorg | College of Engineering | - |
顯示於: | 化學工程學系 |
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