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Characterization of aluminum doped lithium-manganese rich composites for higher rate lithium-ion cathodes

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Hardwick_2014_JTES_Characterization_CC.pdf (1.357Mb)
Date
06/10/2014
Author
Iftekhar, M.
Drewett, N. E.
Armstrong, Robert
Hesp, D.
Braga, F.
Ahmed, S.
Hardwick, L. J.
Keywords
Electrochemical performance
Secondary batteries
Electrodes M
LI
MN
NI
CO
Capacity
Oxygen
Substitution
QD Chemistry
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Abstract
The effect of synthesis method and aluminum doping on layered lithium-manganese rich, mixed metal oxides is presented. Co-precipitation and sol-gel synthesized lithium-manganese rich composite materials revealed differences in capacity and cycle life, which appears from X-ray photoelectron spectra to be strongly related to the particles' surface reactivity. Small amounts of aluminum doping to the sol-gel material were shown to improve the rate capability and cyclability, in addition to decreasing voltage fade, as shown by differential capacity plots. The electrochemistry of an aluminum doped material was revealed to be highly dependent on the degree of aluminum doping - with the behavior of 1% doped material giving a maximum capacity of 201 mAh g-1 at 150 mAg-1 and a capacity retention of 88% after 200 cycles.
Citation
Iftekhar , M , Drewett , N E , Armstrong , R , Hesp , D , Braga , F , Ahmed , S & Hardwick , L J 2014 , ' Characterization of aluminum doped lithium-manganese rich composites for higher rate lithium-ion cathodes ' , Journal of The Electrochemical Society , vol. 161 , no. 14 , pp. A2109-A2116 . https://doi.org/10.1149/2.0441414jes
Publication
Journal of The Electrochemical Society
Status
Peer reviewed
DOI
https://doi.org/10.1149/2.0441414jes
ISSN
0013-4651
Type
Journal article
Rights
© The Author(s) 2014. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.
Description
The authors acknowledge the support from the International Research Support Initiative Program, Higher Education Commission, Pakistan; the Science without Borders Program, Ministério da Educação, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Brazil; and the Engineering and Physical Sciences Research Council (EPRSC) under grant EP/K016954/1
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/6007

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