Abstract
Microvoltammetry for oxide particles of micrometer sizes has been applied to investigate Li+ ion extraction/insertion processes of LiCoO2 and LiNiO2 prepared by a citrate complex method. We intended here high voltage cyclic voltammetry for Li+ extraction/insertion from/into the oxides up to the anodic potential of 5.2 V vs. Li/Li+ in organic solutions containing LiClO4. With simultaneous measurements of voltammograms, in situ observation of the particle deformation during Li+ extraction/insertion was carried out using an optical microscope equipped with a CCD camera and a video recorder. In the case of LiNiC-4, particle splitting during the extraction/insertion was observed; most of the particles are split into several pieces about 4.5 V in the first anodic scanning , and in multi-potential cycling up to 5.0 V with a potential increment of 0.2 V, it takes at above 4.8 V in the anodic scan and at 4.0-4.1 V at the reversed cathodic scan.
Original language | English |
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Pages (from-to) | 954-962 |
Number of pages | 9 |
Journal | Denki Kagaku |
Volume | 65 |
Issue number | 11 |
DOIs | |
Publication status | Published - 1997 |
Keywords
- Cathode
- Deintercalation
- Intercalation/
- Lithium Ion Battery
- Lithium Ion Extraction
- Materials
ASJC Scopus subject areas
- Chemistry(all)