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dc.contributor.authorLi, Xinen_US
dc.contributor.authorWu, Haijunen_US
dc.contributor.authorGuan, Caoen_US
dc.contributor.authorElshahawy, Abdelnaby M.en_US
dc.contributor.authorDong, Yangtaoen_US
dc.contributor.authorPennycook, Stephen J.en_US
dc.contributor.authorWang, Johnen_US
dc.identifier.citationLi, X., Wu, H., Guan, C., Elshahawy, A. M., Dong, Y., Pennycook, S. J. & Wang, J. (2019). (Ni,Co)Se2/NiCo-LDH core/shell structural electrode with the cactus-like (Ni,Co)Se2 core for asymmetric supercapacitors. Small, 15(3), 1803895-.
dc.description.abstractSupercapacitors (SCs) have been widely studied as a class of promising energy-storage systems for powering next-generation E-vehicles and wearable electronics. Fabricating hybrid-types of electrode materials and designing smart nanoarchitectures are effective approaches to developing high-performance SCs. Herein, first, a Ni-Co selenide material (Ni,Co)Se2 with special cactus-like structure as the core, to scaffold the NiCo-layered double hydroxides (LDHs) shell, is designed and fabricated. The cactus-like structural (Ni,Co)Se2 core, as a highly conductive and robust support, promotes the electron transport as well as hinders the agglomeration of LDHs. The synergistic contributions from the two types of active materials together with the superior properties of the cactus-like nanostructure enable the (Ni,Co)Se2/NiCo-LDH hybrid electrode to exhibit a high capacity of ≈170 mA h g−1 (≈1224 F g−1), good rate performance, and long durability. The as-assembled (Ni,Co)Se2/NiCo-LDH//PC (porous carbon) asymmetric supercapacitor (ASC) with an operating voltage of 1.65 V delivers a high energy density of 39 W h kg−1 at a power density of 1650 W kg−1. Therefore, the cactus-like core/shell structure offers an effective pathway to engineer advanced electrodes. The assembled flexible ASC is demonstrated to effectively power electronic devices.en_US
dc.description.sponsorshipMinistry of Education (MOE)en_US
dc.rights© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.en_US
dc.title(Ni,Co)Se2/NiCo-LDH core/shell structural electrode with the cactus-like (Ni,Co)Se2 core for asymmetric supercapacitorsen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.subject.keywordsCactus-like Supporten_US
dc.subject.keywordsCore/shell Structureen_US
dc.description.acknowledgementX.L. and H.J.W. contributed equally to this work. This work was supported by the Ministry of Education, Grant number: MOE2016-T2-2-138, conducted at the National University of Singapore. X.L. was supported by NUSCA2DM.en_US
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