Waste of batteries management: Synthesis of magnetocaloric manganite compound from the REEs mixture generated during hydrometallurgical processing of NiMH batteries
Journal article, 2021

In the present study, rare earth elements (REEs, i.e., La, Ce, Nd, and Pr) were hydrometallurgically recovered in oxalate form with presence of very low concentration of Co, Al, Zn and Ni from solution after processing of spent Nickel metal hydride (Ni-MH) batteries. The recovered mixture was used as alternative source in the synthesis of magnetocaloric materials. In this study, a manganite sample with general formula ABO3 was selected to be prepared since it is relatively easy to synthesize and is tuneable by adjustment of the doping concentration. The conventional solid-state reaction method was used to prepare an orthorhombic structure of manganite with presence of REE2O3 and MnO2 as secondary phases reported from x-ray pattern at room temperature. The thermomagnetic measurements showed a PM to FM transition at 184 K in a 0.01 T magnetic field that shifts to 194 K by increasing the magnetic field to 1.8 T. The magnetocaloric properties were determined by calculating the isothermal entropy change and directly measuring the adiabatic temperature change. A reversible magnetocaloric effect was observed.

Hydrometallurgy

Rare earth recycling

Manganites

Magnetic cooling

Ni-MH batteries

Magnetocaloric effect

Author

Moufida Mansouri

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Nuclear Chemistry

Francesco Cugini

Institute of Materials for Electronics and Magnetism

University of Parma

Cristian Tunsu

Institute of Materials for Electronics and Magnetism

Massimo Solzi

Institute of Materials for Electronics and Magnetism

University of Parma

Franca Albertini

Institute of Materials for Electronics and Magnetism

Burcak Ebin

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Nuclear Chemistry

Martina Petranikova

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Nuclear Chemistry

Sustainable Materials and Technologies

2214-9937 (ISSN)

Vol. 28 e00267

Subject Categories

Inorganic Chemistry

Materials Chemistry

Condensed Matter Physics

DOI

10.1016/j.susmat.2021.e00267

More information

Latest update

4/1/2021 8