Magnesium Deintercalation From the Spinel-Type MgMn2-y Fey O4 (0.4≤y≤2.0) by Acid-Treatment and Electrochemistry.
Alejandro MedinaAna I RodríguezCarlos Pérez-VicenteRicardo AlcántaraPublished in: Chemistry (Weinheim an der Bergstrasse, Germany) (2021)
Rechargeable magnesium batteries attract lots of attention because of their high safety and low cost compared to lithium batteries, and it is needed to develop more efficient electrode materials. Although MgMn2 O4 is a promising material for the positive electrode in Mg rechargeable batteries, it usually exhibits poor cyclability. To improve the electrochemical behavior, we have prepared nanoparticles of MgMn2-y Fey O4 . The XRD results have confirmed that when Mn3+ (Jahn-Teller ion) ions are replaced by Fe3+ (non-Jahn-Teller ion), the resulting MgMn2-y Fey O4 is a cubic phase. The structure and theoretical voltage are theoretically calculated by using the DFT method. The obtained samples have been chemically treated in acid solution for partial demagnesiation, and it is observed that the presence of iron inhibits the deinsertion of Mg through disproportionation and favors the exchange reaction. The electrochemical behavior in non-aqueous magnesium cells has been explored.
Keyphrases
- solid state
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- gold nanoparticles
- induced apoptosis
- molecularly imprinted
- label free
- cell cycle arrest
- electron transfer
- quantum dots
- working memory
- room temperature
- density functional theory
- molecular docking
- metal organic framework
- mass spectrometry
- endoplasmic reticulum stress
- cell death
- oxidative stress
- combination therapy
- high resolution
- newly diagnosed
- cell proliferation
- solid phase extraction
- replacement therapy
- iron deficiency