ChemElectroChem
ChemElectroChem
4 years ago

Formation of Dandelion-Like Co3O4/CoWO4 Heterojunctions for Enhanced Supercapacitive Performance

Formation of Dandelion-Like Co3O4/CoWO4 Heterojunctions for Enhanced Supercapacitive Performance
Juping Li, Xiao Zhang, Kun Ding, Xin Cheng, Ping Yang
The dandelion-like Co3O4/CoWO4 heterostructure was fabricated for the first time through a two-step hydrothermal method involving the preparation of urchin-like Co(CO3)0.5(OH) ⋅ 0.11H2O at low temperature, as well as its decomposition and an in situ growth of CoWO4 nanoparticles at relatively high temperature. It is noted that the introduction of Na2WO4 ⋅ 2H2O can maintain the morphology stability of precursor and promote the growth of CoWO4 species, whilst the precursor can be decomposed into the Co3O4 phase at higher hydrothermal temperature. The effects of Na2WO4 ⋅ 2H2O on the morphology and electrochemical properties of Co3O4 material were discussed. The electrochemical results showed that the Co3O4/CoWO4 hybrid electrode exhibited enhanced specific capacitance, which was 3.4 times larger than that of the pure Co3O4 electrode. The enhanced electrochemical properties were ascribed to the reasonable combination of these two types of electrochemically active materials and its unique architectural feature. Flower power: Dandelion-like Co3O4/CoWO4 heterostructures are fabricated for the first time through a two-step hydrothermal method for application in supercapacitors. The enhanced electrochemical performance is ascribed to the reasonable combination of these two kinds of electrochemically active materials and its unique architectural feature.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/celc.201700704

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