Journal
CHEMICAL ENGINEERING JOURNAL
Volume 399, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.125532
Keywords
Multifunctional; Asymmetric; Capacity; Water-splitting; Overpotential
Categories
Funding
- National Research Foundation of Korea (NRF) [2019R1F1A1051574]
- X-Mind Cops Program of the National Research Foundation of Korea - Ministry of Science and Technology, ICT and Future Planning [2017H1D8A230449]
- National Research Foundation of Korea [2019R1F1A1051574] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Designing and exploring a simple, novel, and smart synthetic concept to fabricate highly efficient and dual function electrode material at an optimum cost for green energy harvesters has been a long-standing challenge. Herein, for the first time, we investigated a simple and smart concept to fabricate dual-function vapor solid phase grown copper oxide nanowires (CuxO NWs) integrated metal-organic frameworks-derived (MOFs) hollow and porous cobalt sulfide (CuxO NWs@CoS2) hybrid nanostructures as an effective binder-free electrode for super capacitors and the OER. When utilized as an electrode material for supercapacitors, the CuxO NWs@CoS2 hybrid electrode displayed an ultrahigh specific capacity of 331.6 mAh/g (volumetric capacity of 2.46 mAh/cm(3)) with an outstanding rate capability of 67% even at a high current density of 50 mA/cm(2); moreover, the electrode possessed a long-term durability of 100.2% after 10,000 cycles. An all-solid-state asymmetric device (CuxO NWs NWs@CoS2//Fe2O3/rGO aerogels) delivered a specific energy density of 49.8 Wh/kg. In addition, the oxygen evolution activity of the CuxO NWs@CoS2 electrode was also investigated and the electrode demonstrated superior catalytic properties compared to other formulations. This investigation emphasizes a novel synthetic approach and its multifunctional applicability in energy storage and generation devices.
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