Abstract
Supercapacitors have the potential to complement or replace batteries in many current and emerging applications. As inexpensive and environmentally benign capacitive materials, manganese oxides are promising electrode materials. Nanostructured oxides have high energy storage capacities owing to their increased surface-area-to-volume ratios as compared to bulk materials. By electrospinning precursor-containing polymer fibers and subsequently calcining, nanostructured MnOx fibers can be prepared with relative ease. Controlling calcination pressure and time provides a route for variable capacitance via modifying surface roughness and oxide phase. At moderate pressures and short calcination times, mixed-phase Mn2O3/Mn3O4 fibers with high surface roughness exhibit enhanced electrochemical specific capacitance.
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Brockway, M.C., Skinner, J.L. Variable Phase and Electrochemical Capacitance of Electrospun MnOx Fibers Via Controlled Calcination. MRS Advances 4, 2383–2390 (2019). https://doi.org/10.1557/adv.2019.293
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DOI: https://doi.org/10.1557/adv.2019.293