Full synergistic effect of hydrothermal NiCo2O4 nanosheets/CuCo2O4 nanocones supported on Ni foam for high-performance asymmetric supercapacitors

Full synergistic effect of hydrothermal NiCo2O4 nanosheets/CuCo2O4 nanocones supported on Ni foam... In this work, a series of NiCo2O4/CuCo2O4 composites were prepared by a two-step hydrothermal method. The optimized NiCo2O4/CuCo2O4 electrode shows more than 5 times area capacitance (4.97 F cm−2) than pure NiCo2O4 at the current density of 1 mA cm−2. The best performance of sample assembled an asymmetric supercapacitor could reach up to 42 F g−1 at the current density of 1 A g−1. In addition, the maximum energy density of 15 W h kg−1 was achieved with the power density of 814 W kg−1. The as-prepared active electrode material also reveals excellent cycling stability with 90.6% capacitance retention after 5000 cycles. These results indicate potential application in developing energy storage devices with high energy density power density. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Solid State Chemistry Elsevier

Full synergistic effect of hydrothermal NiCo2O4 nanosheets/CuCo2O4 nanocones supported on Ni foam for high-performance asymmetric supercapacitors

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Publisher
Elsevier
Copyright
Copyright © 2018 Elsevier Ltd
ISSN
0022-4596
eISSN
1095-726X
D.O.I.
10.1016/j.jssc.2018.03.023
Publisher site
See Article on Publisher Site

Abstract

In this work, a series of NiCo2O4/CuCo2O4 composites were prepared by a two-step hydrothermal method. The optimized NiCo2O4/CuCo2O4 electrode shows more than 5 times area capacitance (4.97 F cm−2) than pure NiCo2O4 at the current density of 1 mA cm−2. The best performance of sample assembled an asymmetric supercapacitor could reach up to 42 F g−1 at the current density of 1 A g−1. In addition, the maximum energy density of 15 W h kg−1 was achieved with the power density of 814 W kg−1. The as-prepared active electrode material also reveals excellent cycling stability with 90.6% capacitance retention after 5000 cycles. These results indicate potential application in developing energy storage devices with high energy density power density.

Journal

Journal of Solid State ChemistryElsevier

Published: Jun 1, 2018

References

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