LiCo2/3Ni1/6Mn1/6O2 Nanoparticles as Energy Storage Material

Lithium ion batteries are widely used as the most advanced power sources for portables electronic devices. LiCoO2 is at the present the popularly used positive electrode material in commercial Li-ion battery, many efforts have been made to improve the electrochemical performance of LiCoO2 cathode by partial substitution of Co with other elements such as Ni, Mn, Cr ,Al, Mg…Many synthesis methods can be used to prepare electrochemically active compounds. In this work, we explore the combustion method to synthesize LiCo2/3Ni1/6Mn1/6O2 because it is one of the best ways to prepare the nano-size cathode material. Cathode materials with small particles tend to have high initial capacity.Figure 1 shows the SEM image of the LiCo2/3Ni1/6Mn1/6O2 particles. The material is characterized by a high homogeneity and a granular shape with an average particles size less than 500nm.The electrochemical tests of the studied cathode shows a good reversibility of the charge/discharge process in the regimes C/5, C/2 and 1C. XRD diffractograms obtained for various compositions clearly evidenced the conservation of the good crystallinity during cycling. More detailed analysis of crystal structure and extensive electrochemical testing results will be presented.