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Title: Synthesis and electrochemical studies of the 4 V cathode, Li(Ni2/3Mn1/3)O2
Authors: Reddy, M.V. 
Subba Rao, G.V. 
Chowdari, B.V.R. 
Keywords: Capacity-fading
Cathode material
Electrochemical properties
Layered structure
Lithium-ion battery
Issue Date: 6-Oct-2006
Citation: Reddy, M.V., Subba Rao, G.V., Chowdari, B.V.R. (2006-10-06). Synthesis and electrochemical studies of the 4 V cathode, Li(Ni2/3Mn1/3)O2. Journal of Power Sources 160 (2 SPEC. ISS.) : 1369-1374. ScholarBank@NUS Repository.
Abstract: Layered Li(Ni2/3Mn1/3)O2 compounds are prepared by freeze-drying, mixed carbonate and molten salt methods at high temperature. The phases are characterized by X-ray diffraction, Rietveld refinement, and other methods. Electrochemical properties are studied versus Li-metal by charge-discharge cycling and cyclic voltammetry (CV). The compound prepared by the carbonate route shows a stable capacity of 145 (±3) mAh g-1 up to 100 cycles in the range 2.5-4.3 V at 22 mA g-1. In the range 2.5-4.4 V at 22 mA g-1, the compound prepared by molten salt method has a stable capacity of 135 (±3) mAh g-1 up to 50 cycles and retains 96% of this value after 100 cycles. Capacity-fading is observed in all the compounds when cycled in the range 2.5-4.5 V. All the compounds display a clear redox process at 3.65-4.0 V that corresponds to the Ni2+/3+-Ni3+/4+ couple. © 2006.
Source Title: Journal of Power Sources
ISSN: 03787753
DOI: 10.1016/j.jpowsour.2006.03.046
Appears in Collections:Staff Publications

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