Kang, Jin-Gu Ko, Young-Dae Park, Jae-Gwan Kim, Dong-Wan 2024-01-20T22:33:48Z 2024-01-20T22:33:48Z 2021-09-03 2008-10 1931-7573 https://pubs.kist.re.kr/handle/201004/133097 Transition metal oxides have been suggested as innovative, high-energy electrode materials for lithium-ion batteries because their electrochemical conversion reactions can transfer two to six electrons. However, nano-sized transition metal oxides, especially Co3O4, exhibit drastic capacity decay during discharge/charge cycling, which hinders their practical use in lithium-ion batteries. Herein, we prepared nano-sized Co3O4 with high crystallinity using a simple citrate-gel method and used electrochemical impedance spectroscopy method to examine the origin for the drastic capacity fading observed in the nano-sized Co3O4 anode system. During cycling, AC impedance responses were collected at the first discharged state and at every subsequent tenth discharged state until the 100th cycle. By examining the separable relaxation time of each electrochemical reaction and the goodness-of-fit results, a direct relation between the charge transfer process and cycling performance was clearly observed. English SPRINGER LITHIUM-ION BATTERIES NEGATIVE-ELECTRODE ANODE MATERIALS PARTICLE-SIZE LI NANOPARTICLES PERFORMANCE ALPHA-FE2O3 REACTIVITY REDUCTION Origin of capacity fading in nano-sized Co3O4 electrodes: Electrochemical impedance spectroscopy study Article 10.1007/s11671-008-9176-7 1 NANOSCALE RESEARCH LETTERS, v.3, no.10, pp.390 - 394 NANOSCALE RESEARCH LETTERS 3 10 390 394 scie scopus 000259819700008 2-s2.0-53349103131 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Science & Technology - Other Topics Materials Science Physics Article LITHIUM-ION BATTERIES NEGATIVE-ELECTRODE ANODE MATERIALS PARTICLE-SIZE LI NANOPARTICLES PERFORMANCE ALPHA-FE2O3 REACTIVITY REDUCTION nano-sized Co3O4 Li-ion batteries capacity fading electrochemical impedance spectroscopy charge transfer reaction