Journal
JOURNAL OF POWER SOURCES
Volume 146, Issue 1-2, Pages 323-326Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2005.03.025
Keywords
heat treatment; lithium; spinel-rocksalt transformation
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Nano-sized crystalline gamma-Fe2O3 (particle size ca. 7 nm) was synthesized by mild oxidation of iron micelle obtained from Fe(CO)(5). Heat treatment at 400 degrees C in vacuum was effective to remove a large amount of organic impurities, the weight of which was over 40 wt.% in the as-prepared solid phase. Significant suppression of the spinel-rocksalt transformation was confirmed as the major nano-sized effect and led to the reversible topochemical lithium interaction with the corresponding lattice volume expansion. (c) 2005 Elsevier B.V. All rights reserved.
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