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Li(Al1–zZnz) alloys as anode materials for rechargeable Li-ion batteries

Published online by Cambridge University Press:  31 January 2011

I. Chumak ,
G. Dmytriv ,
V. Pavlyuk ,
S. Oswald ,
J. Eckert ,
H. Trill ,
H. Eckert ,
H. Pauly  and
H. Ehrenberg
I. Chumak*
Affiliation:
IFW Dresden, Institute for Complex Materials, 01069 Dresden, Germany
V. Pavlyuk
Affiliation:
Department of Inorganic Chemistry, Ivan Franko Lviv National University, 79005 Lviv, Ukraine
J. Eckert*
Affiliation:
IFW Dresden, Institute for Complex Materials, 01069 Dresden, Germany
H. Eckert
Affiliation:
Institute for Physical Chemistry, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
H. Pauly
Affiliation:
Technische Universität Darmstadt, Materials Science, 64287 Darmstadt, Germany
H. Ehrenberg
Affiliation:
IFW Dresden, Institute for Complex Materials, 01069 Dresden, Germany
*
a)Address all correspondence to this author. e-mail: [email protected]
b)This author was an editor of this journal during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to http://www.mrs.org/jmr_policy
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Abstract

The cycling behavior of anode materials based on alloys from the Li(Al1–zZnz) continuous solid solution has been studied. The performance of the most promising composition Li(Al0.8Zn0.2) was tested in half-cells against metallic Li with three different electrolytes and in full Li-ion cells against a V2O5 cathode. The underlying structure evolution during cycling and the most relevant fatigue mechanisms are elucidated by x-ray diffraction, nuclear magnetic resonance, and x-ray photoelectron spectroscopy, and reveal a loss of mobile Li due to the ongoing formation of solid electrolyte interfaces. An enhanced stability for Li(Al1–zZnz) electrodes with z˜0.2 results from a peculiar microstructure due to the decomposition of Al and Zn in the Li-poor state and their intermixing in the Li-rich state.

Keywords

Energy storageFatigueLi
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 8: Materials for Electrical Energy Storage , August 2010 , pp. 1492 - 1499
Copyright
Copyright © Materials Research Society 2010

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References

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