Facile Fabrication of Binder-Free CoZn LDH/CFP Electrode with Enhanced Capacitive Properties for Asymmetric Supercapacitor.
In: Journal of Inorganic & Organometallic Polymers & Materials, Jg. 31 (2021-10-01), Heft 10, S. 3953-3961
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Zugriff:
CoZn layered double hydroxide (LDH) or Co(OH)2 pseudocapacitive material has been prepared on the current collector of carbon fiber paper (CFP) using an eco-friendly one-step electrodeposition. Benefiting from its unique structural feature, the binder-free CoZn LDH/CFP electrode material realizes high specific capacitance of 1156 Fg−1 at a current density of 1 Ag−1 and excellent rate capability of 80% retention with 16 fold current density increment, which is much better than that of Co(OH)2 (617 Fg−1, 65%). Notably, the CoZn LDH/CFP can retain an outstanding electrochemical stability with a capacitance degradation of only 6% after 6000 charge–discharge cycles at 32 Ag−1. Moreover, an asymmetric supercapacitor (ASC) using CoZn LDH/CFP as a positive electrode and AC/CFP as a negative electrode has been assembled. The ASC exhibits a superior energy density of 30.0 Whkg−1 at a power density of 800 Wkg−1 with a specific capacitance up to 84.4 Fg−1 and a potential window wide to 1.6 V. These encouraging results indicate that CoZn LDH/CFP composite material has a great potential for next-generation energy conversion/storage devices. [ABSTRACT FROM AUTHOR]
Titel: |
Facile Fabrication of Binder-Free CoZn LDH/CFP Electrode with Enhanced Capacitive Properties for Asymmetric Supercapacitor.
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Autor/in / Beteiligte Person: | Zhao, Cuimei ; Lin, Li ; Tian, Songlin ; Nie, Ping ; Xue, Xiangxin ; Wang, Hairui ; Xu, Tianhao ; Chang, Limin |
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Zeitschrift: | Journal of Inorganic & Organometallic Polymers & Materials, Jg. 31 (2021-10-01), Heft 10, S. 3953-3961 |
Veröffentlichung: | 2021 |
Medientyp: | academicJournal |
ISSN: | 1574-1443 (print) |
DOI: | 10.1007/s10904-021-02023-z |
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