Synthesis and characterization of nanocomposites based on poly(3-hexylthiophene)-graft-carbon nanotubes with LiNi0.5Mn1.5O4 and its application as potential cathode materials for lithium-ion batteries

Abstract

The P3HT grafted on CNTs to form the P3HT-g-CNTs nanocomposites was synthesized and their morphologies, structure have been characterized via the sedimentation test, scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results showed that the P3HT-g-CNTs has a better thermal stability than that of the P3HT/CNTs blend. The nanocomposite based on P3HT-g-CNTs and doped spinel LiNi0.5Mn1.5O4 (LNMO) have been fabricated via mixing process. The structure and morphologies of LNMO/P3HT-g-CNTs nanocomposites have also been performed by SEM, XRD and TEM. The electrochemical performance of LNMO/P3HT-g-CNTs nanocomposites as cathode materials of lithium-ion batteries were investigated by cyclic voltammetry and electrochemical impedance spectroscopy and exhibited the high diffusion of lithium ions in the charge-discharge process.