dc.date.accessioned | 2022-03-01T18:07:16Z | |
dc.date.available | 2022-12-10T23:46:06Z | |
dc.date.created | 2021-04-07T13:29:46Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Gayathri, Sampath Arunkumar, Paulraj Saha, Dipankar Han, Jong Hun . Composition engineering of ZIF-derived cobalt phosphide/cobalt monoxide heterostructures for high-performance asymmetric supercapacitors. Journal of Colloid and Interface Science. 2021, 588, 557-570 | |
dc.identifier.uri | http://hdl.handle.net/10852/91658 | |
dc.description.abstract | The fabrication of interpenetrated heterostructures from desirable energy materials for the development of efficient supercapacitors is promising yet challenging. Herein, a leaf-shaped cobalt phosphide/cobalt oxide heterostructure, (CoPx)1-y/CoOy (0.44 > y > 0.06), was synthesized from 2D-zeolitic-imidazolate-framework (ZIF-Co-L) molecular precursor via phosphidation of the Co3O4 intermediate. The efficient construction of heterostructure through the variation of surface/bulk composition significantly alters the interfacial properties and electronic structure, yielding enhanced supercapacitor performance. Further, gas-phase phosphidation entails a core–shell formation mechanism via gas diffusion, regulated by the Kirkendall effect. The optimized heterostructure (y = 0.10) exhibits remarkable interfacial properties derived from the CoO/Co0/CoP interface, thus facilitating a high specific capacitance (467 F g−1 at 5 A g−1) and excellent cycling stability (~91% after 10000 cycles) at 30 A g−1. A further increase in the cyclability (~107%) was achieved by employing a graphene hybrid. Further, an asymmetric supercapacitor device was fabricated, that delivers reasonably high energy density of 12.7 Wh kg−1 at a power density of 370 W kg−1 and cycling stability of ~93% after 10000 cycles. This study reports on the modulation of interfacial properties of CoPx/CoO heterostructure to enhance energy storage performance via bulk/surface compositional variation, thereby providing a strategy to develop heterostructure electrodes for high-performance supercapacitor. | |
dc.language | EN | |
dc.title | Composition engineering of ZIF-derived cobalt phosphide/cobalt monoxide heterostructures for high-performance asymmetric supercapacitors | |
dc.type | Journal article | |
dc.creator.author | Gayathri, Sampath | |
dc.creator.author | Arunkumar, Paulraj | |
dc.creator.author | Saha, Dipankar | |
dc.creator.author | Han, Jong Hun | |
cristin.unitcode | 185,15,12,0 | |
cristin.unitname | Kjemisk institutt | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.fulltext | postprint | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 1902727 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Colloid and Interface Science&rft.volume=588&rft.spage=557&rft.date=2021 | |
dc.identifier.jtitle | Journal of Colloid and Interface Science | |
dc.identifier.volume | 588 | |
dc.identifier.startpage | 557 | |
dc.identifier.endpage | 570 | |
dc.identifier.doi | https://doi.org/10.1016/j.jcis.2020.11.129 | |
dc.identifier.urn | URN:NBN:no-94238 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0021-9797 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/91658/1/JCIS-20-5400_R1%2B-%2BCopy.pdf | |
dc.type.version | AcceptedVersion | |