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Variable Phase and Electrochemical Capacitance of Electrospun MnOx Fibers Via Controlled Calcination

Published online by Cambridge University Press:  03 July 2019

Molly C. Brockway  and
Jack L. Skinner
Molly C. Brockway*
Affiliation:
Materials Science Ph.D., Montana University System, Butte, MT59701
Jack L. Skinner
Affiliation:
Department of Mechanical Engineering, Montana Technological University, Butte, MT59701
*
*(Email: mbrockway@mtech.edu)
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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.

Keywords

oxideenergy storagefiberMn
Type
Articles
Information
MRS Advances , Volume 4 , Issue 44-45: Characterization, Processing and Theory , 2019 , pp. 2383 - 2390
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Copyright
Copyright © Materials Research Society 2019 

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