High rate capabilities induced by multi-phasic nanodomains in iron-substituted calcium cobaltite electrodes
- High rate capabilities induced by multi-phasic nanodomains in iron-substituted calcium cobaltite electrodes
- 고영대; 강진구; 최경진; 박재관; 안재평; 정경윤; 남경완; 윤원섭; 김동완
- calcium cobaltite; electrochemical conversion reaction; nanoplates; Li ion batteries
- Issue Date
- Journal of materials chemistry
- VOL 19, NO 13, 1829-1835
- 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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