Surface modification of Li1.2Mn0.6Ni0.2O2 with electronic conducting polypyrrole

Abstract

To enhance the initial coulombic efficiency, cyclic stability and electronic conductivity of lithium-rich cathode material Li1.2Mn0.6Ni0.2O2, surface modification is carried out by a facile chemical oxidation polymerization method with pyrrole monomer. The comparison between bare and polypyrrole-coated samples on the structure, morphology and electrochemical properties are investigated and analyzed. Despite sacrificed a part of initial capacity, the initial coulombic efficiency, the cyclic stability and electronic conductivity have been improved.