Characterization of Li-rich xLi2MnO3•(1-x)Li[MnyNizCo1-y-z]O2 as cathode active materials for Li-ion batteries

We have investigated the crystallographical, morphological, and electrochemical behaviors of synthesized four different compositions of xLi(2)MnO(3)center dot(1-x)Li[MnyNizCo1-y-z]O-2 cathode active materials using X-ray diffractometer (XRD), field emission scanning electron microscope (FE-SEM), and galvanostatic cycler. The four different compositions of cathode active materials demonstratea commonly angular shape of primary particles, but agglomerated spherical shape in appearance. All the attempted compositions of xLi(2)MnO(3)center dot(1-x)Li[MnyNizCo1-y-z]O-2 cathodes deliver a specific discharge capacity of between 220 and 242 mAh/g at room temperature when cycled between 2.5 and 4.6V versus Li/Li+ at C/10 rate. (C) 2013 Elsevier Ltd. All rights reserved.