Design of Composites Based on Lithium Titanate and Carbon Nanomaterials for High-Power Lithium-Ion Batteries

Abstract

The composite nanomaterials based on hydrothermally or sol-gel synthesized Li4Ti5O12 and both nitrogen-doped and undoped carbons were prepared and investigated by XRD, SEM, low-temperature nitrogen adsorption, dc-measurements, charge-discharge tests, cyclic voltammetry, and electrochemical impedance spectroscopy. Carbon nanotube introduction provides the formation of a highly conductive 3D network resulting in increase in electronic conductivity, lithium diffusion, and thus improvement of rate-capability and cycling stability of the composites.