Abstract
Manganese oxide electrodes possessing pseudo-capacitance behaviors were successfully made with a simple sol-gel method. The experimental results showed that the specific capacitance was 101.2 F/g for pure manganese oxide films after annealing at 300° C. However, the specific capacitance increased to 232.3 F/g with iron acetate (1.0 mol% Fe) addition and after annealing at 350° C. The surface morphology observations revealed that the annealing temperature of 350° C produced a higher surface area film with smaller pores. X-ray diffraction results showed that the manganese-iron oxide was composed of Mn 3O4 and Mn2O3 phases, without iron oxide diffraction peaks. The manganese-iron oxide electrode with Mn 3O4 and Mn2O3 phases exhibited good electrochemical performance and capacitance efficiency.
Original language | English |
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Pages (from-to) | 7831-7838 |
Number of pages | 8 |
Journal | Ceramics International |
Volume | 39 |
Issue number | 7 |
DOIs | |
Publication status | Published - Sep 2013 |
Keywords
- Iron acetate
- Manganese acetate
- Pseudo-capacitance
- Sol-gel
- Specific capacitance
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Process Chemistry and Technology
- Surfaces, Coatings and Films
- Materials Chemistry