Ko, Young-Dae Kang, Jin-Gu Park, Jae-Gwan Kim, Dong-Wan 2024-01-20T20:03:11Z 2024-01-20T20:03:11Z 2021-09-04 2010-01 0021-891X https://pubs.kist.re.kr/handle/201004/131837 A Ca3Co3FeO9 electrode exhibiting enhanced cycle-life performance compared to that of Co3O4 was presented in this study. In order to examine the mechanism of the improved capacity retention in the Ca3Co3FeO9 electrode, the cycling-induced variation of electrode kinetics was observed using electrochemical impedance spectroscopy. The separable electrochemical reactions using the appropriate equivalent circuit and the goodness-of-fit results demonstrated the superior charge-transfer kinetics of Ca3Co3FeO9, compared to Co3O4, during prolonged cycling. These results clearly demonstrated the benefits of the inactive CaO matrix that is spontaneously formed in Ca3Co3FeO9 during the first discharge process. English SPRINGER LITHIUM-ION BATTERIES LI-ION NEGATIVE-ELECTRODE NANOCOMPOSITE ELECTRODES ANODE MATERIALS CO3O4 PERFORMANCE STORAGE OXIDES GITT Electrochemical impedance spectroscopic characterization on nano-sized Ca3Co3FeO9 electrode with enhanced capacity retention Article 10.1007/s10800-009-9986-z 1 JOURNAL OF APPLIED ELECTROCHEMISTRY, v.40, no.1, pp.109 - 114 JOURNAL OF APPLIED ELECTROCHEMISTRY 40 1 109 114 scie scopus 000272904300014 2-s2.0-73349101843 Electrochemistry Electrochemistry Article LITHIUM-ION BATTERIES LI-ION NEGATIVE-ELECTRODE NANOCOMPOSITE ELECTRODES ANODE MATERIALS CO3O4 PERFORMANCE STORAGE OXIDES GITT Ca3Co3FeO9 Li-ion batteries Capacity retention Electrochemical impedance spectroscopy Charge-transfer kinetics