Variable Phase and Electrochemical Capacitance of Electrospun MnOx Fibers Via Controlled Calcination
| Autor: | Molly C. Brockway, Jack L. Skinner |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Supercapacitor
Materials science Mechanical Engineering Oxide 02 engineering and technology Surface finish 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Capacitance Electrospinning 0104 chemical sciences law.invention chemistry.chemical_compound Chemical engineering chemistry Mechanics of Materials law Surface roughness General Materials Science Calcination Fiber 0210 nano-technology |
| Zdroj: | MRS Advances. 4:2383-2390 |
| ISSN: | 2059-8521 |
| DOI: | 10.1557/adv.2019.293 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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