article · Solid State Sciences
Cobalt manganese oxide spinel has been synthesised directly onto flexible stainless-steel mesh using a hydrothermal process. Testing different reaction durations between six and 24 hours revealed that a 24-hour treatment produced the material with optimal stoichiometry, strong crystallinity, and a tetragonal crystal structure. The resulting material formed sheet-like particles measuring approximately 1.92 micrometres, displaying cobalt and manganese oxides across its surface. Electrochemical evaluations showed high charge-storage capabilities, achieving a cyclic voltammetry specific capacitance of 1014.15 farads per gram at one millivolt per second, as well as 764.84 farads per gram at five millivolts per second. Galvanostatic charge-discharge measurements recorded a specific capacitance of 724.61 farads per gram at a current density of five amperes per gram, accompanied by a low charge-transfer resistance of 7.71 ohms. These properties suggest suitability for practical supercapacitor components.
Energy storage systems require durable electrodes capable of delivering fast, high-capacity charge storage. Demonstrating that cobalt manganese oxide can be grown directly onto flexible stainless steel offers a viable route towards robust supercapacitor electrodes. The high capacitance and low electrical resistance achieved provide useful benchmarks for developing efficient, responsive energy storage materials.
The work targets supercapacitor manufacturers and developers of flexible energy storage devices. Because the study focuses on laboratory synthesis and electrochemical characterisation on stainless-steel mesh, the technology remains at an early, lab-scale stage of research. Moving towards commercialisation will require testing device-level integration, operational lifespan, and manufacturing scalability beyond laboratory hydrothermal preparation.
AI-generated from the published abstract. Always read the original work before citing.
CoMn2O4 spinel was synthesized on stainless steel mesh through a hydrothermal process, controlling the reaction time (6 h, 12 h, 18 h, and 24 h). Characterization techniques included XRD, ATR-FTIR, XPS, and SEM-EDS. The 24-h reaction time led to CoMn2O4 spinel with the desired structure, stoichiometry, and good crystallinity. The sample exhibited a tetragonal structure, with Co–O and Mn–O vibrational bands, and manganese (Mn3+) and cobalt (Co2+) metal oxides on the surface. It had a sheet-like shape with an average particle size of 1.92 ± 0.28 μm. Electrochemical tests showed high CV-specific capacitance of 1014.15 F g−1 at 1 mV s−1 and 764.84 F g−1 at 5 mV s−1, aligned with GCD-specific capacitance at 5 A g−1 (724.61 F g−1) and a charge-transfer resistance of 7.71 Ω. The synthesized electrode holds promise for practical energy storage devices, namely for supercapacitor applications.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.1016/j.solidstatesciences.2023.107283
Is something wrong with this record? Report it or request removal.
Discussion
Have you built on this work, tried to replicate it, or seen it applied in practice? Share what you know. Verified researchers and MARATTO™ domain experts can open a discussion, and any member can reply. Contributions are reviewed before they appear.
No discussion yet. Open the first thread.
New to MARATTO™? Create a free account.
