Electronic and Bonding Properties of LiMn₂O₄ Spinel with Different Surface Orientations and Doping Elements and their Effects on Manganese Dissolution
This paper investigates the effects of surface orientation and doping on the dissolution of Mn ions from LiMn2O4 structures using first principles calculations. Our aim is to understand why certain surface orientations and element dopings produce structures with lower Mn dissolution. By comparing the electronic properties and structures of systems with different surfaces and dopings, Mn dissolution mechanisms and their prevention can be better understood. Based on our calculations, Mn dissolution is strongly correlated with the electronic and bonding properties of the Mn-O bonds. Surface orientations with a larger number of Mn-O bonds and smaller bond length require more energy to break the Mn-O bonds. In addition, doping with certain elements changes the bonding state of Mn, which either prevents or aggravates Mn dissolution.
Y. K. Lee et al., "Electronic and Bonding Properties of LiMn₂O₄ Spinel with Different Surface Orientations and Doping Elements and their Effects on Manganese Dissolution," Journal of The Electrochemical Society, vol. 163, no. 7, pp. A1359-A1368, The Electrochemical Society, Jan 2016.
The definitive version is available at https://doi.org/10.1149/2.0991607jes
Mechanical and Aerospace Engineering
Center for High Performance Computing Research
Second Research Center/Lab
Intelligent Systems Center
International Standard Serial Number (ISSN)
Article - Journal
© 2016 The Electrochemical Society, All rights reserved.
01 Jan 2016