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Cu-Doped Layered Double Hydroxide Constructs the Performance-Enhanced Supercapacitor Via Band Gap Reduction and Defect Triggering
Abstract
Layered double hydroxides (LDHs) are regarded as the excellent electrode materials for supercapacitors because of their high theoretical capacitance and abundance. However, the poor conductivity and limited reaction kinetics of LDHs restrict their practical application severely. Herein, Cu is chosen from groups VIII/IB/IIB as dopants for Co-based LDH (CuCo-LDH). The designed metal–organic framework-derived hierarchical CuCo-LDH hollow nanoarrays integrated on nickel foam are fabricated via a facile in situ hydrolysis method. Consequently, the introduction of copper significantly enhances the local electron density of cobalt-based hydroxide, which enhances electronic conductivity and facilitates the charge transfer. Copper doping induces lattice defects, providing more active sites to improve the charge storage capacity. As a result, our CuCo-LDH electrode delivers a package-enhanced pseudocapacitive performance. The as-fabricated asymmetric supercapacitor CuCo-LDH//AC provides a relatively high energy density of 22 W h kg–1 and a remarkable cycling stability (91.3% after 10,000 cycles) towards practical applications of supercapacitors.
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Authors (9)
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Xianyu Chu
- Jilin University
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Fanling Meng
- Jilin University
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He Yang
- Jilin University
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Wei Zhang
- Jilin University
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Tingting Qin
- Jilin University
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Zizhun Wang
- Jilin University
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Weitao Zheng
- Jilin University
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
ACS Applied Energy Materials
no. 5,
pages 2192 - 2201,
ISSN: 2574-0962 - Language:
- English
- Publication year:
- 2022
- Bibliographic description:
- Chu X., Meng F., Yang H., Zhang W., Qin T., Wang Z., Molin S., Jasiński P., Zheng W.: Cu-Doped Layered Double Hydroxide Constructs the Performance-Enhanced Supercapacitor Via Band Gap Reduction and Defect Triggering// ACS Applied Energy Materials -Vol. 5,iss. 2 (2022), s.2192-2201
- DOI:
- Digital Object Identifier (open in new tab) 10.1021/acsaem.1c03740
- Verified by:
- Gdańsk University of Technology
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