DC Field | Value | Language |
---|---|---|
dc.contributor.author | Jung, Ji-Won | ko |
dc.contributor.author | Nam, Jong Seok | ko |
dc.contributor.author | Klyukin, Konstantin | ko |
dc.contributor.author | Youn, Doo-Young | ko |
dc.contributor.author | Kim, Il-Doo | ko |
dc.date.accessioned | 2021-05-25T07:30:20Z | - |
dc.date.available | 2021-05-25T07:30:20Z | - |
dc.date.created | 2021-05-25 | - |
dc.date.created | 2021-05-25 | - |
dc.date.created | 2021-05-25 | - |
dc.date.issued | 2021-05 | - |
dc.identifier.citation | NANO ENERGY, v.83 | - |
dc.identifier.issn | 2211-2855 | - |
dc.identifier.uri | http://hdl.handle.net/10203/285332 | - |
dc.description.abstract | Flexible lithium–air batteries (F-LABs) operating under ambient air have attracted much interest as small-sized energy storage devices in routine household settings. Although the instability of the commonly used carbon cathode has prompted the search for a carbon-free cathode, there has not been much success in their development thus far. Here, we report a novel strategic approach to fabricate a large-area carbon-free cathode for shape-deformable F-LABs in ambient air. An electronically conductive and catalytic layer consisting of metallic iridium (Ir) and outermost IrOx was deposited on porous, flexible polyimide nanofibers (PI@IrOx NFs) by radio frequency (RF) sputtering, which was employed as the flexible cathode. Their properties were evaluated under dynamic deformation modes such as bending, folding, twisting, and crumpling. The F-LAB cells with PI@IrOx NFs were stable for 150 cycles using pure O2, and in a dry-air atmosphere (O2/CO2/N2), they remain stable for 300 cycles (=600 h) with low discharge/charge overpotentials by the redox mediator and solid-state electrolyte (L1.3Al0.3Ti1.7(PO4)3, LATP). We elucidate the reaction mechanism at the IrOx surface using ex-situ analyses and density functional theory (DFT) calculations. When applied to pouch-/cable-type F-LAB cells using two different electrolytes (gel-polymer and poly(ethylene oxide)(PEO)/LATP composite electrolytes), the PI@IrOx NFs show superior electrochemical characteristics during repetitive 300 bending cycles for over 60 h in ambient air. Furthermore, the F-LAB cells could be assembled using 3D-printed shape-deformable polyurethane (PU) as the packaging material, demonstrating their practical operation in small devices for the first time. | - |
dc.language | English | - |
dc.publisher | ELSEVIER | - |
dc.title | Straightforward strategy toward a shape-deformable carbon-free cathode for flexible Li–air batteries in ambient air | - |
dc.type | Article | - |
dc.identifier.wosid | 000639794400002 | - |
dc.identifier.scopusid | 2-s2.0-85100412322 | - |
dc.type.rims | ART | - |
dc.citation.volume | 83 | - |
dc.citation.publicationname | NANO ENERGY | - |
dc.identifier.doi | 10.1016/j.nanoen.2021.105821 | - |
dc.contributor.localauthor | Kim, Il-Doo | - |
dc.contributor.nonIdAuthor | Klyukin, Konstantin | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Sputtering | - |
dc.subject.keywordAuthor | Carbon-free cathodes | - |
dc.subject.keywordAuthor | Shape-deformable electrodes | - |
dc.subject.keywordAuthor | Lithium?air batter-ies | - |
dc.subject.keywordAuthor | Ambient air | - |
dc.subject.keywordPlus | LITHIUM-OXYGEN BATTERY | - |
dc.subject.keywordPlus | POLYMER ELECTROLYTES | - |
dc.subject.keywordPlus | REDOX MEDIATORS | - |
dc.subject.keywordPlus | MEMBRANE | - |
dc.subject.keywordPlus | ENERGY | - |
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