DC Field | Value | Language |
---|---|---|
dc.contributor.author | Byun, Segi | ko |
dc.contributor.author | Shim, Yoonsu | ko |
dc.contributor.author | Yuk, Jong Min | ko |
dc.contributor.author | Lee, Chan-Woo | ko |
dc.contributor.author | Yoo, Jungjoon | ko |
dc.date.accessioned | 2022-05-06T07:00:09Z | - |
dc.date.available | 2022-05-06T07:00:09Z | - |
dc.date.created | 2022-05-06 | - |
dc.date.created | 2022-05-06 | - |
dc.date.created | 2022-05-06 | - |
dc.date.issued | 2022-07 | - |
dc.identifier.citation | CHEMICAL ENGINEERING JOURNAL, v.439 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.uri | http://hdl.handle.net/10203/296381 | - |
dc.description.abstract | Reduced graphene oxide (rGO)-based micro-supercapacitors (MSCs) have emerged as a new type of micro-energy storage device. However, the low volumetric energy density of rGO hampers the application of MSCs in mini-aturized energy storage devices. Hybridization of pseudocapacitive materials with rGO is a potential approach to increase the energy density of MSCs. Herein, a densely packed hybrid film of birnessite-type manganese oxide (K-MnOx) supported by rGO is developed, and hybrid-film-based MSCs are found to show a high volumetric capacitance (490 F/cm(3)) that is & nbsp;similar to 1.2 and 19 times greater than those of rGO and K-MnOx-based MSCs, respectively. A semi-permanent cycle life with capacitance retention of 97% after 10,000 cycles is observed. Moreover, a charge reservoir concept is introduced, which explains the origin of the high pseudocapacitance of the K-MnOx/rGO hybrid in a unique way. It is observed that synergistic interaction among the charge reservoir (rGO) and electron transfer channel (K-MnOx, which becomes conductive at the interface) facilitates the charging and discharging of K ions, with minimum deviation of the Mn oxidation states. This new charge reservoir concept would serve as a stepping stone toward designing novel hybrid devices with high energy storage capabilities. | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.title | Reduced graphene oxide as a charge reservoir of manganese oxide: Interfacial interaction promotes charge storage property of MnOx-based micro-supercapacitors | - |
dc.type | Article | - |
dc.identifier.wosid | 000783190900002 | - |
dc.identifier.scopusid | 2-s2.0-85126128489 | - |
dc.type.rims | ART | - |
dc.citation.volume | 439 | - |
dc.citation.publicationname | CHEMICAL ENGINEERING JOURNAL | - |
dc.identifier.doi | 10.1016/j.cej.2022.135569 | - |
dc.contributor.localauthor | Yuk, Jong Min | - |
dc.contributor.nonIdAuthor | Byun, Segi | - |
dc.contributor.nonIdAuthor | Lee, Chan-Woo | - |
dc.contributor.nonIdAuthor | Yoo, Jungjoon | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Reduced graphene oxide | - |
dc.subject.keywordAuthor | Birnessite manganese oxide | - |
dc.subject.keywordAuthor | Heterostructured film | - |
dc.subject.keywordAuthor | Density functional theory calculation | - |
dc.subject.keywordAuthor | Micro-supercapacitor | - |
dc.subject.keywordPlus | VOLUMETRIC CAPACITANCE | - |
dc.subject.keywordPlus | GRAPHITE OXIDE | - |
dc.subject.keywordPlus | ANODE MATERIAL | - |
dc.subject.keywordPlus | ELECTRODE | - |
dc.subject.keywordPlus | HYBRID | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | MICROSUPERCAPACITORS | - |
dc.subject.keywordPlus | NANOCOMPOSITE | - |
dc.subject.keywordPlus | BEHAVIOR | - |
dc.subject.keywordPlus | FILMS | - |
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