期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 783, 期 -, 页码 772-778出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.12.247
关键词
Praseodymium oxide; Core-shell structure; Supercapacitor
资金
- Australian Research Council Discovery Program [DP150103006, DP170104831]
A facile solvothermal method is used to fabricate hierarchical core-shell nanostructures based on praseodymium, nickel and cobalt oxides supported on nickel foam. The Pr6O11 nanoparticles were first grown on the nickel foam and then utilized as a backbone for anchoring NiO, Co3O4 and NiCo2O4 nanostructures to form a core-shell structure. The core-shell electrodes exhibit superior electrochemical performance than single Pr6O11 nanoparticles electrodes. A superior specific capacitance of 1635 F/g at a current density of 0.5 mA/cm(2) with good cycling stability was obtained for the Pr6O11@NiCo2O4 electrode. Moreover, a solid-state supercapacitor was fabricated by assembling Pr6O11@NiCo2O4 electrodes using KOH/PVA as the solid electrolyte. The as-prepared solid-state device demonstrated impressive energy density of 6.6 W h/kg and a power density of 150 W/kg. This optimal performance could be attributed to the high conductive nickel foam current collector and synergistic effects generated from the core-shell architecture of NiCo2O4 and the Pr6O11 nanoparticles. Crown Copyright (C) 2018 Published by Elsevier B.V. All rights reserved.
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