Chemical routes to synthesize lithium cobalt oxide powders for rechargeable lithium batteries
- Carnegie Mellon Univ., Pittsburgh, PA (United States); and others
Lithium cobalt oxide (LiCoO{sub 2}) is known to be a good cathode material for high voltage (4V) rechargeable Li-ion batteries. New chemical routes based on aqueous solution chemistry have been developed to synthesize molecularly mixed precursors that transform to form LiCoO{sub 2} at temperatures as low as 400{degrees}C. The resultant oxide powders are nanocrystalline ({approx} 20-40 nm) and exhibit unique morphologies and microstructures depending on the molecular environment of the ions in solution. Cathodes fabricated from the oxide powders and tested in {open_quote}hockey-puck{close_quote} test cells exhibited specific capacities of about 135 mAh/g with a reversible range close to 0.5 Li ions. Results of the phase evolution and microstructural analysis are discussed in relation to the electrochemical performance of the cathodes.
- OSTI ID:
- 472039
- Report Number(s):
- CONF-950401--; CNN: Contract N00014-94-1-0773; Grant CTS-9309073; Grant DMR-9301014
- Country of Publication:
- United States
- Language:
- English
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