Boosting the energy density of highly efficient flexible hybrid supercapacitors via selective integration of hierarchical nanostructured energy materials. (20th December 2020)

• Record Type: Journal Article
• Authors: Anil Kumar, Yedluri; Sambasivam, Sangaraju; Ahmed Hira, Shamim; Zeb, Kamran; Uddin, Waqar; Krishna, T.N.V.; Dasha Kumar, Kulurumotlakatla; Obaidat, Ihab M.; Kim, Hee-Je
• Is Part Of: Electrochimica acta. Volume 364(2020)
• Publication Date: 2020-12-20
• Subjects: Multicomponent battery-type nanostructured composite -- Ni(OH)2 NFAs@ZnO–ZnCo2O4 NWAs -- Fe2O3@NF NFAs -- Highly efficient FHSCs device -- Supercapacitor -- Energy storage device; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2020.137318
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: Ni(OH)2 NFAs@ZnO–ZnCo2 O4 NWAs and Fe2 O3 @NF NFAs composite were proposed. The both active materials were directly grown on nickel foam via hydrothermal approach. The hierarchical composite structure accelerates the ion diffusion and electron transfer. The electrochemical performances of FHSCs device were constructed. The novel FHSCs device achieved superhigh energy and power densities. Abstract: A preeminent technique to boost the energy density of flexible hybrid supercapacitor (FHSCs) is to develop unique, extremely efficient, and smart positive and negative current collectors with hierarchical nanoarchitectures integration of various electroactive materials. Herein, we present a facile and flexible approach towards the synthesis of selective integration of hierarchical leaflet-like Ni(OH)2 nanoflake arrays with ZnO–ZnCo2 O4 nanowire arrays (Ni(OH)2 NFAs@ZnO–ZnCo2 O4 NWAs) on Ni foam mesh for ultrahigh-capability electrodes. The innovative strategy results in hierarchical architecture with highly altered electronic nanostructure, which not only enhances the specific surface area but also provides ultrafast transportations between ions and electrons. Under electrochemical conditions, the battery-type materials of the hierarchical leaflet-like Ni(OH)2 NFAs@ZnO–ZnCo2 O4 NWAs electrodes show ultrahigh specific capacity of 237.7 mA h g −1 at 2 A g −1 ; this value is 2.16, 1.53 and 1.30 times than those of ZnO–ZnCo2 O4 NWAs, CoO NFAs@ZnO–ZnCo2 O4 NWAs and ZnO NFAs@ZnO–ZnCo2 O4 NWAs electrodes, respectively. Most importantly, in flexible assembly, the Ni(OH)2 NFAs@ZnO–ZnCo2 O4 NWAs//Fe2 O3 @NF NFAs FHSCs device delivers an ultrahigh energy density of 80.10 W h kg −1 a superior life-spam performance, and retention around 98.2% of initial capacity after 5000 cycles. The new innovative strategy could be very promising for future flexible electronics devices. Graphical abstract: Image, graphical abstract