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In Situ X-RAY Diffraction Studies of Li+ Insertion into V6O13

Published online by Cambridge University Press:  25 February 2011

C. Lampe-Önnerud ,
T. Gustafsson  and
J.O. Thomas
C. Lampe-Önnerud
Affiliation:
Institute of Chemistry, Uppsala University, Box 531, S–751 21 Uppsala, Sweden.
T. Gustafsson
Affiliation:
Institute of Chemistry, Uppsala University, Box 531, S–751 21 Uppsala, Sweden.
J.O. Thomas
Affiliation:
Institute of Chemistry, Uppsala University, Box 531, S–751 21 Uppsala, Sweden.
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Abstract

A fast in situ X-ray powder diffraction set-up working in transmission mode is used to explore the structural changes occurring on Li+ insertion into the active V6O13 component of the cathode in a thin-film < Li I polymer electrolyte | V6O13 > battery. It is confirmed that the V6O13 is indeed converted reversibly into three discrete phases, LixV6O13 for x = 1, 4 and 8, as the fully charged cell (ca. 3.OV) is discharged to 1.8V. The effect on the insertion process of repeated cycling with different currents has been studied. Cell collapse was induced after ca. 35 cycles for 0.2 mA/cm2. This was not reflected, however, in any significant change in the diffraction pattern from the battery. Moreover, the battery returned to normal functioning after lying on open circuit for 7 days. A gradual loss of reflection intensity is observed, but no particle line-broadening. The implications of these results are discussed as they relate to the nature of the solid-state insertion process of Li+ into V6O13.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 293: Symposium U – Solid State Ionics III , 1992 , 49
Copyright
Copyright © Materials Research Society 1993

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