Preliminary Studies of Mn-Rich Li[Li x (Ni0.3Co0.1Mn0.6)1−x ]O2(x = 0.09, 0.11) as Cathode Active Materials for Lithium Rechargeable Batteries
Novel cathode active materials, Li[Li x (Ni0.3Co0.1Mn0.6)1−x ]O2 (x = 0.09, 0.11) composed of rod-like primary particles, but aggregated spherical shape in appearance, were synthesized. The newly Mn-rich cathode active materials were then adopted as cathodes to show the benefits for Li-ion rechargeable batteries. The results show that to use proper nano-scaled particles as a cathode and to make homogeneous particle sizes have great improvements on electrochemical performances, probably ascribed to enhancement of charge transfer kinetics and lower cell impedance at high voltage region (∼4.6 V). The electrochemical performances of Mn-rich cathodes were investigated by cycler (BT2000, Arbin), comparing electrochemical behaviors between room and elevated temperature, 55 °C. The morphology of cathodes having nano-scaled particles of active materials and the Mn-rich cathode active materials were investigated using field emission scanning electron microscope (FE-SEM) and field emission transmission electron microscope (FE-TEM), also the crystalline phase identification was analyzed by high power X-ray diffractometer (XRD).
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Document Type: Research Article
Publication date: January 1, 2011
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