Jump to main content
Jump to site search


Engineering Onion-Like Nanoporous CuCo2O4 Hollow Spheres Derived from Bimetal–Organic Frameworks for High-Performance Asymmetric Supercapacitor

Abstract

Engineering complex hollow nanostructures of mixed transition metal oxides are necessary to respond the increasing progress of modern electronics. As an interesting spinel mixed metal oxide, for the first time, we engineer onion-like nanoporous CuCo2O4 hollow spheres (ON-CCO) with a high surface area of 63 m2 g−1 and more than six thin shells. It is derived from bimetal-organic frameworks for high-performance asymmetric supercapacitors. The ON-CCO electrode exhibits excellent electrochemical performance including high reversibility, fast kinetics, low internal resistance, an ultrahigh specific capacitance of 1700 F g−1 with an excellent rate capability of 68% after increasing the current density by a factor of 50. Furthermore, the as-prepared ON-CCO//AC asymmetric supercapacitor delivers significant performance consisting of excellent cycle life (only 8.8% loss after 10000 charge/discharge cycles), a maximum energy density of 48.75 W h kg−1 and a power density up to 37.5 kW kg−1, which is superior to conventional supercapacitors and can compete with Ni–MH batteries. This remarkable performance attributed to the unique structural properties of the ON-CCO electrode holds great promise for next-generation of high-performance portable electronics and electric vehicles.

Back to tab navigation

Supplementary files

Publication details

The article was received on 27 Mar 2018, accepted on 08 May 2018 and first published on 08 May 2018


Article type: Paper
DOI: 10.1039/C8TA02819B
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
  •   Request permissions

    Engineering Onion-Like Nanoporous CuCo2O4 Hollow Spheres Derived from Bimetal–Organic Frameworks for High-Performance Asymmetric Supercapacitor

    A. A. Ensafi, S. E. Moosavifard, B. Rezaei and S. Kamari Kaverlavani, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA02819B

Search articles by author

Spotlight

Advertisements