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Influence of Lithium Content on Performance of Layered Li1+z[Ni0.45Mn0.45Co0.1]1-zO2 in Lithium Ion Batteries

Published online by Cambridge University Press:  26 February 2011

Jie Xiao ,
Natasha A. Chernova  and
M. Stanley Whittingham
Jie Xiao
Affiliation:
jxiao1@binghamton.edu, State University of New York at Binghamton, Chemistry, State Univerdity of New York at Binghamton, Binghamton, NY, 13902, United States, 607-777-4623, 607-777-4623
Natasha A. Chernova
Affiliation:
nchernova@gmail.com, State University of New York at Binghamton, Department of Chemistry, Binghamton, NY, 13902, United States
M. Stanley Whittingham
Affiliation:
stanwhit@binghamton.edu, State University of New York at Binghamton, Department of Chemistry, Binghamton, NY, 13902, United States
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Abstract

Li1+z[Ni0.45Mn0.45Co0.1]1-zO2(0.8≤1+z≤1.2) has been synthesized by the co-precipitation method. It was found that 5% excess lithium must be added to obtain the desired composition. XRD results show that an apparent single-phase structure appears except for the lowest lithium content. The layered character of the structure increases with increasing lithium content and Rietveld refinement reveals that cation disorder decreases rapidly as more lithium is added. This conclusion is further confirmed by magnetic studies in which only Li0.8[Ni0.45Mn0.45Co0.1]1.2O2 and Li0.9(Ni0.45Mn0.45Co0.1)1.1O2 show magnetization hysteresis loops. The electrochemical behavior of this series of samples is compared to figure out the best lithium to transition metal ratio.

Keywords

energy-storagex-ray diffraction (XRD)magnetic properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 972: Symposium AA – Solid-State Ionics—2006 , 2006 , 0972-AA06-11
Copyright
Copyright © Materials Research Society 2007

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References

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