Rechargeable lithium battery cathodes. Nonaqueous synthesis, characterization, and electrochemical properties of LiCoO{sub 2}
- Sandia National Labs., Albuquerque, NM (United States)
- Air Force Research Lab., Kirtland AFB, NM (United States)
A nonaqueous coprecipitation process has been developed to prepare controlled stoichiometry lithium cobalt oxide precipitates. The process involved mixing a methanolic LiCo-(NO{sub 3}){sub 3} solution with a methanolic solution containing tetramethylammonium oxalate as a precipitating agent. The resulting oxalates were readily converted to phase-pure lithium cobalt oxide at 800 C under an oxygen atmosphere. The various starting solutions, oxalate precipitates, and the resulting oxides have been extensively characterized using a variety of techniques, including multinuclear NMR, TGA/DTA, EPR, and XRD analyses. Results indicate that the strong interaction between the metals (Li and Co) that occurred in solution was maintained during precipitation. The calcined precipitate revealed that the desired LiCoO{sub 2} phase was formed at 800 C under an O{sub 2} atmosphere. When electrochemically cycled, the material exhibited an initial capacity of {approximately}133 (mA h)/g with a fade of 0.02% in capacity per cycle.
- Research Organization:
- Sandia National Laboratory
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 655353
- Journal Information:
- Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 8 Vol. 10; ISSN 0897-4756; ISSN CMATEX
- Country of Publication:
- United States
- Language:
- English
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