(Ni,Co)Se2/NiCo-LDH core/shell structural electrode with the cactus-like (Ni,Co)Se2 core for asymmetric supercapacitors
Supercapacitors (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-performanc...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Online Access: | https://hdl.handle.net/10356/151261 |
| _version_ | 1826124136040103936 |
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| author | Li, Xin Wu, Haijun Guan, Cao Elshahawy, Abdelnaby M. Dong, Yangtao Pennycook, Stephen J. Wang, John |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Li, Xin Wu, Haijun Guan, Cao Elshahawy, Abdelnaby M. Dong, Yangtao Pennycook, Stephen J. Wang, John |
| author_sort | Li, Xin |
| collection | NTU |
| description | Supercapacitors (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. |
| first_indexed | 2024-10-01T06:15:44Z |
| format | Journal Article |
| id | ntu-10356/151261 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:15:44Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1512612021-06-14T07:15:09Z (Ni,Co)Se2/NiCo-LDH core/shell structural electrode with the cactus-like (Ni,Co)Se2 core for asymmetric supercapacitors Li, Xin Wu, Haijun Guan, Cao Elshahawy, Abdelnaby M. Dong, Yangtao Pennycook, Stephen J. Wang, John School of Electrical and Electronic Engineering Engineering::Materials Cactus-like Support Core/shell Structure Supercapacitors (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. Ministry of Education (MOE) X.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. 2021-06-14T07:15:08Z 2021-06-14T07:15:08Z 2019 Journal Article Li, 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-. https://dx.doi.org/10.1002/smll.201803895 1613-6810 https://hdl.handle.net/10356/151261 10.1002/smll.201803895 30556280 2-s2.0-85058535919 3 15 1803895 en MOE2016-T2-2-138 Small © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. |
| spellingShingle | Engineering::Materials Cactus-like Support Core/shell Structure Li, Xin Wu, Haijun Guan, Cao Elshahawy, Abdelnaby M. Dong, Yangtao Pennycook, Stephen J. Wang, John (Ni,Co)Se2/NiCo-LDH core/shell structural electrode with the cactus-like (Ni,Co)Se2 core for asymmetric supercapacitors |
| title | (Ni,Co)Se2/NiCo-LDH core/shell structural electrode with the cactus-like (Ni,Co)Se2 core for asymmetric supercapacitors |
| title_full | (Ni,Co)Se2/NiCo-LDH core/shell structural electrode with the cactus-like (Ni,Co)Se2 core for asymmetric supercapacitors |
| title_fullStr | (Ni,Co)Se2/NiCo-LDH core/shell structural electrode with the cactus-like (Ni,Co)Se2 core for asymmetric supercapacitors |
| title_full_unstemmed | (Ni,Co)Se2/NiCo-LDH core/shell structural electrode with the cactus-like (Ni,Co)Se2 core for asymmetric supercapacitors |
| title_short | (Ni,Co)Se2/NiCo-LDH core/shell structural electrode with the cactus-like (Ni,Co)Se2 core for asymmetric supercapacitors |
| title_sort | ni co se2 nico ldh core shell structural electrode with the cactus like ni co se2 core for asymmetric supercapacitors |
| topic | Engineering::Materials Cactus-like Support Core/shell Structure |
| url | https://hdl.handle.net/10356/151261 |
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