Waste of batteries management: Synthesis of magnetocaloric manganite compound from the REEs mixture generated during hydrometallurgical processing of NiMH batteries
Autor: | Cristian Tunsu, F. Cugini, Franca Albertini, Massimo Solzi, Martina Petranikova, Moufida Mansouri, Burçak Ebin |
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Rok vydání: | 2021 |
Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Hydride Doping Analytical chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Manganite 01 natural sciences Industrial and Manufacturing Engineering Oxalate Isothermal process 0104 chemical sciences chemistry.chemical_compound Nickel chemistry Magnetic refrigeration General Materials Science Orthorhombic crystal system 0210 nano-technology Waste Management and Disposal |
Zdroj: | Sustainable Materials and Technologies. 28:e00267 |
ISSN: | 2214-9937 |
Popis: | 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. |
Databáze: | OpenAIRE |
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