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Synthesis and electrochemical performance of doped LiCoO2 materials
- Source :
-
Journal of Power Sources . Dec2007, Vol. 174 Issue 2, p828-831. 4p. - Publication Year :
- 2007
-
Abstract
- Abstract: Layered intercalation compounds LiM0.02Co0.98O2 (M=Mo6+, V5+, Zr4+) have been prepared using a simple solid-state method. Morphological and structural characterization of the synthesized powders is reported along with their electrochemical performance when used as the active material in a lithium half-cell. Synchrotron X-ray diffraction patterns suggest a single phase HT-LiCoO2 that is isostructural to α-NaFeO2 cannot be formed by aliovalent doping with Mo, V, and Zr. Scanning electron images show that particles are well-crystallized with a size distribution in the range of 1–5μm. Charge–discharge cycling of the cells indicated first cycle irreversible capacity loss in order of increasing magnitude was Zr (15mAhg−1), Mo (22mAhg−1), and V (45mAhg−1). Prolonged cycling the Mo-doped cell produced the best performance of all dopants with a stable reversible capacity of 120mAhg−1 after 30 cycles, but was inferior to that of pure LiCoO2. [Copyright &y& Elsevier]
- Subjects :
- *BICYCLES
*OPTICAL diffraction
*BULK solids
*PARTICLES (Nuclear physics)
Subjects
Details
- Language :
- English
- ISSN :
- 03787753
- Volume :
- 174
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Journal of Power Sources
- Publication Type :
- Academic Journal
- Accession number :
- 28080659
- Full Text :
- https://doi.org/10.1016/j.jpowsour.2007.06.228