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Issue 38, 2014
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Migration of Mn cations in delithiated lithium manganese oxides

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Abstract

Li2MnO3 is an integrated component in lithium-manganese-rich nickel manganese cobalt oxides, and the conversion of Li2MnO3 to a spinel-like structure after electrochemical activation has been associated with the continuous potential decay of the material. Delithiated Li2MnO3 and delithiated LiMn2O4 were used as model materials to investigate the mechanism of forming the spinel-like structure. An in situ high-energy X-ray diffraction technique was used to trace the structural change of materials at elevated temperatures, a procedure to mimic the structural transformation during the normal cycling of batteries. It was also found that the migration of Mn atoms from the octahedral sites to tetrahedral sites is the key step for phase transformation from a monoclinic structure to a spinel structure.

Graphical abstract: Migration of Mn cations in delithiated lithium manganese oxides

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Article information


Submitted
25 Jun 2014
Accepted
01 Aug 2014
First published
04 Aug 2014

Phys. Chem. Chem. Phys., 2014,16, 20697-20702
Article type
Paper

Migration of Mn cations in delithiated lithium manganese oxides

Y. Kan, Y. Hu, C. Lin, Y. Ren, Y. Sun, K. Amine and Z. Chen, Phys. Chem. Chem. Phys., 2014, 16, 20697
DOI: 10.1039/C4CP02795G

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