Mechanochemical synthesis of Li₂MnO₃ shell/LiMO₂ (M = Ni, Co, Mn) core-structured nanocomposites for lithium-ion batteries.

ABSTRACT: Core/shell-like nanostructured xLi2MnO3·(1-x)LiMO2 (M = Ni, Co, Mn) composite cathode materials are successfully synthesized through a simple solid-state reaction using a mechanochemical ball-milling process. The LiMO2 core is designed to have a high-content of Ni, which increases the specific capacity. The detrimental surface effects arising from the high Ni-content are countered by the Li2MnO3 shell, which stabilizes the nanoparticles. The electrochemical performances and thermal stabilities of the synthesized nanocomposites are compared with those of bare LiMO2. In particular, the results of time-resolved X-ray diffraction (TR-XRD) analyses of xLi2MnO3·(1-x)LiMO2 nanocomposites as well as their differential scanning calorimetry (DSC) profiles demonstrate that the Li2MnO3 shell is effect

SUBMITTER: Noh JK 

PROVIDER: S-EPMC4007074 | biostudies-literature | 2014 May

REPOSITORIES: biostudies-literature