Characterization of LT-Li{sub x}Co{sub 1{minus}y}Ni{sub y}O{sub 2} electrodes for rechargeable lithium cells
- CSIR, Pretoria (South Africa). Div. of Materials Science and Technology
LT-LiCo{sub 0.9}Ni{sub 0.1}O{sub 2} prepared at 400 C with a structure that is intermediate between an ideal lithiated spinel and a layered structure has been investigated as an electrode in rechargeable lithium cells; it delivers a voltage vs. pure lithium that is significantly lower than the voltage provided by its high-temperature analogue, HT-LiCo{sub 0.9}Ni{sub 0.1}O{sub 2}, (synthesized at 900 C). The rechargeability of Li/LT-LiCo{sub 0.9}Ni{sub 0.1}O{sub 2} cells can be improved by leaching some lithium and a small amount of cobalt performance is attributed to the formation of a defect spinel phase Li{sub 0.8}[Co{sub 1.6}Ni{sub 0.2}]O{sub 4} in which the lithium ions adopt the tetrahedral A sites and the cobalt and nickel ions the B sites of an A[B{sub 2}]O{sub 4} spinel.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 142172
- Journal Information:
- Journal of the Electrochemical Society, Vol. 140, Issue 12; Other Information: PBD: Dec 1993
- Country of Publication:
- United States
- Language:
- English
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