Mixed valence nanostructured Mn3O4 for supercapacitor applications
Source abstract
Abstract
Nanostructured Mn3O4 with an average crystallite size of ∼19 nm was synthesized through a microwave-assisted chemical route. Structural characterization was carried out using X-ray diffraction analysis and transmission electron microscopy. Observed change in the ratio of lattice constants, c/a for the sample compared with single-crystalline Mn3O4 points to the presence of Mn4+ ions at the octahedral sites. This is attributed to the presence of cation vacancies. X-ray photoelectron spectroscopic studies confirm the presence of Mn4+ ions. Specific capacitance value of 665.08 F g−1 was obtained for symmetric supercapacitor with Mn3O4 active material at slow scan rate. Reasonably high power and energy density values, viz., 4.27 kW kg−1 and 4.36 × 10−2 Wh kg−1, respectively, were obtained for charge–discharge cycles at a constant current of 12.74 mA cm−2.
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Research context
OpenAlex topics: Supercapacitor Materials and Fabrication · Advancements in Battery Materials · Nanomaterials for catalytic reactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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