Dalton Transactions
Dalton Transactions
3 years ago

Testing the reversible insertion of magnesium in cationic-deficient manganese oxy-spinel through a concentration cell

Alejandro Medina, Ana I Rodríguez, Carlos Perez Vicente, Ricardo Alcantara
Magnesium-ion batteries could be competitive against lithium-ion batteries, but it is needed to verify the reversible intercalation of magnesium in the framework of the host material. A concentration cell has been built by using electrodes with different concentrations of magnesium ion in the cubic spinel MgxMn2O4. For this purpose, firstly cations were partially extracted from MgMn2O4 by acid-treatment. This concentration cell is used to test the reversible intercalation of magnesium and the effect of the cationic vacancies. The theoretical results on the percolation energy can explain the lower polarization experimentally observed in the voltage curve of the acid-treated sample.The reversible capacity (ca. 115 mAh g-1) is preserved after charge-discharge cycling.

Publisher URL: http://feeds.rsc.org/~r/rss/DT/~3/PDDLZXBqAjg/D0DT03856C

DOI: 10.1039/d0dt03856c

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