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Electrochemical properties of mixed cathode consisting of μm-sized LiCoO2 and nm-sized Li[Co0.1Ni0.15Li0.2Mn0.55]O2 in lithium rechargeable batteries
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- Authors
- Kwang Man Kim, Sang Hyo Lee, Sang Hyo Kim, Young Gi Lee
- Issue Date
- 2009-09
- Citation
- Journal of Applied Electrochemistry, v.39, no.9, pp.1487-1495
- ISSN
- 0021-891X
- Language
- English
- Type
- Journal Article
- Abstract
- In order to enhance the utilization of active cathode material in lithium rechargeable batteries, physical mixtures of μm-sized LiCoO2 (LCO) and nm-sized Li[Co0.1Ni0.15Li0.2Mn 0.55]O2 (LCMNO) were prepared by varying the LCO content, and the physical and electrochemical properties of lithium half-cells utilizing the mixed cathodes were characterized. Our main concern is the packing state between the microparticles and nanoparticles within the electrode, which influences the determination of the electrode density. We found that the electrode composed of 80 wt.% LCO and 20 wt.% LCMNO shows the best performance in capacity retention ratio and high-rate capability, which are comparable to those of LCMNO, due to the superior density in the electrode's packing state over other samples. © 2009 Springer Science+Business Media B.V.
- KSP Keywords
- Best performance, Cathode materials, Half-cell, Physical and electrochemical properties, Physical mixtures, capacity retention, electrode density, high-rate capability, lithium rechargeable batteries