High rate capabilities induced by multi-phasic nanodomains in iron-substituted calcium cobaltite electrodes

Title
High rate capabilities induced by multi-phasic nanodomains in iron-substituted calcium cobaltite electrodes
Authors
고영대강진구최경진박재관안재평정경윤남경완윤원섭김동완
Keywords
calcium cobaltite; electrochemical conversion reaction; nanoplates; Li ion batteries
Issue Date
2009-04
Publisher
Journal of materials chemistry
Citation
VOL 19, NO 13, 1829-1835
Abstract
Two-dimensional (2-D) nanoplates of iron-substituted calcium cobaltite (Ca3Co3FeO9) are synthesized through a simple citrate-gel method. The lithium electroactivity of Ca3Co3FeO9 demonstrates that this is an applicable active anode material. In this study, we focus on the reversible conversion process and internally multi-phasic, nanostructured character occurring in Ca3Co3FeO9 nanoplates. Moreover, we demonstrate that in-situ formation of active/inactive nanocomposite improves the conversion reaction kinetics by accommodating the large volume changes during lithium uptake and removal, thereby achieving outstanding rate capabilities.
URI
http://pubs.kist.re.kr/handle/201004/35035
ISSN
0959-9428
Appears in Collections:
KIST Publication > Article
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