What is it about?
Li ion batteries are important for electro mobility, mobile phones, laptops etc. We investigated the chemical reactions between Li and MgFe2O4 which is a possible anode material in Li ion batteries deliivering a high specific capacity.
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Why is it important?
Conversion materials are promising for future Li ion batteries due to their high specific capacity. We demonstrate that Li uptake by MgFe2O4 first leads to formation of a monooxide followed by conversion to metallic Fe nanoparticles embedded in Li2O. Mg2+ cations cannot be reduced. During Li relaese metallic Fe is oxidized to Fe3+.
Perspectives
Only application of a variety of state-of-the-art analytical techniques allowed elucidation of the detailed reaction mechanisms occuring during Li uptake and release by MgFe2O4. The article demonstrates that for understanding chemical reactions thorough experiments are necessary.
Professor Wolfgang Bensch
Christian-Albrechts-Universitat zu Kiel
Read the Original
This page is a summary of: Is there a universal reaction mechanism of Li insertion into oxidic spinels: a case study using MgFe2O4, Journal of Materials Chemistry A, January 2015, Royal Society of Chemistry,
DOI: 10.1039/c4ta05054a.
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