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Binder-Free Nickel Oxide Lamellar Layer Anchored CoO$_{x}$ Nanoparticles on Nickel Foam for Supercapacitor Electrodes

Chen, Bohua; Zhong, Yu; Shen, Gengzhe; Wang, Fengming; Liu, Zhihao; Chen, Mei; Yang, Weijia; Zhang, Chi; He, Xin 1
1 Institut für Mechanische Verfahrenstechnik und Mechanik (MVM), Karlsruher Institut für Technologie (KIT)


To enhance the connection of electroactive materials/current collector and accelerate the transport efficiency of the electrons, a binder-free electrode composed of nickel oxide anchored CoO$_{x}$ nanoparticles on modified commercial nickel foam (NF) was developed. The nickel oxide layer with lamellar structure which supplied skeleton to load CoO$_{x)$ electroactive materials directly grew on the NF surface, leading to a tight connection between the current collector and electroactive materials. The fabricated electrode exhibits a specific capacitance of 475 F/g at 1 mA/cm$^{2}$. A high capacitance retention of 96% after 3000 cycles is achieved, attributed to the binding improvement at the current collector/electroactive materials interface. Moreover, an asymmetric supercapacitor with an operating voltage window of 1.4 V was assembled using oxidized NF anchored with cobalt oxide as the cathode and activated stainless steel wire mesh as the anode. The device achieves a maximum energy density of 2.43 Wh/kg and power density of 0.18 kW/kg, respectively. The modified NF substrate conducted by a facile and effective electrolysis process, which also could be applied to deposit other electroactive materials for the energy storage devices

Verlagsausgabe §
DOI: 10.5445/IR/1000130119
Veröffentlicht am 26.02.2021
DOI: 10.3390/nano10020194
Zitationen: 6
Zitationen: 6
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mechanische Verfahrenstechnik und Mechanik (MVM)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2079-4991
KITopen-ID: 1000130119
Erschienen in Nanomaterials
Verlag MDPI
Band 10
Heft 2
Seiten Art.-Nr.: 194
Vorab online veröffentlicht am 22.01.2020
Nachgewiesen in Scopus
Web of Science
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