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Choi, Kyoung Jin
Energy Conversion Materials (EcoMAT) Lab
Research Interests
  • Solar cells, thermoelectrics, piezoelectric

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

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Title
High rate capabilities induced by multi-phasic nanodomains in iron-substituted calcium cobaltite electrodes
Author
Ko, Young-DaeKang, Jin-GuChoi, Kyoung JinPark, Jae-GwanAhn, Jae-PyoungChung, Kyung YoonNam, Kyung-WanYoon, Won-SubKim, Dong-Wa
Keywords
LITHIUM-ION BATTERIES; ANODE MATERIALS; ELECTROCHEMICAL PROPERTIES; NEGATIVE-ELECTRODE; LI; CO3O4; COMPOSITE; PERFORMANCE; NANOWIRES; IMPEDANCE
Issue Date
2009
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY, v.19, no.13, pp.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.
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DOI
10.1039/b817120c
ISSN
0959-9428
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MSE_Journal Papers
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