Supercapacitor Electrodes: Is Nickel Foam the Right Substrate for Active Materials?

Ni foam is an extensively used current collector and substrate in investigations of electrochemically active materials such as supercapacitors and electrocatalysts for oxygen and hydrogen evolution reactions. This material is relatively cheap, porous, and conductive and has a large specific surface area, all of which make it a good substrate. We investigated Ni-Mg ferrites and NiMnO as active materials for electrochemical energy storage.

Effect of Shielding Gas Arc Welding Process on Cavitation Resistance of Welded Joints of AlMg4.5Mn Alloy.

The effect of the shielding gas arc welding process on the cavitation resistance of the three-component aluminum alloy AlMg4.5Mn and its welded joints was investigated. Welding was performed using the GTAW and GMAW processes in a shielded atmosphere of pure argon.

Antioxidant and cell-friendly FeTiO nanoparticles for food packaging application.

An emerging technology of active packaging enables prolongation of food shelf life by limiting the oxygen transfer and the reactivity of free radicals, which both destruct food freshness. In this work, FeTiO nanoparticles were synthesized using a modified sol-gel method and evaluated as an enforcement of alginate food packaging film. Pure phase FeTiO nanoparticles had an average particle size of 44 nm and rhombohedral morphology.

Exploring the impact of calcination parameters on the crystal structure, morphology, and optical properties of electrospun FeTiO nanofibers.

Nanostructured FeTiO (pseudobrookite), a mixed metal oxide material holds significant promise for utilization in energy and environmental applications. However, its full application is still hindered due to the difficulty to synthesize monophasic FeTiO with high crystallinity and a large specific surface area. Herein, FeTiO nanofibers were synthesized a versatile and low-cost electrospinning method, followed by a calcination process at different temperatures.

Electrospun Nickel Manganite (NiMnO) Nanocrystalline Fibers for Humidity and Temperature Sensing.

Nickel manganite nanocrystalline fibers were obtained by electrospinning and subsequent calcination at 400 °C. As-spun fibers were characterized by TG/DTA, Scanning Electron Microscopy and FT-IR spectroscopy analysis. X-ray diffraction and FT-IR spectroscopy analysis confirmed the formation of nickel manganite with a cubic spinel structure, while N physisorption at 77 K enabled determination of the BET specific surface area as 25.