Insight into effects of graphene and zinc oxide in Li_4Ti_5O_(12) as anode materials for Li-ion full-cell battery

摘要

Programmable design of nanocomposites of Li4Ti5O12 (LTO) conducted through hydrothermal route in the presence of ethylenediamine as basic and capping agent. In this work, effect of ZnO and Graphene on the Li4Ti5O12 based nanocomposites as anode materials investigated for Li-Ion battery performances. The full cells battery assembled with LTO based nanocomposites on Cu foil as the anode electrode and commercial LMO (LiMn2O4) on aluminum foil as cathode electrode. X-Ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDS), Fourier-transform infrared spectroscopy (FT-IR), along with Field Emission Scanning Electron Microscopy (FE-SEM) and Transmission electron microscopy (TEM) images was applied for study the composition and structure of as-prepared samples. The electrochemical lithium storage capacity of prepared nanocomposites was compared with pristine LTO via chronopotentiometry charge-discharge techniques at 1.5-4.0 V and current rate of 100 mA/g. As a result, the electrode which is provided by LTO/TiO2/ZnO and LTO/TiO2/graphene nanocomposites provided 765 and 670 mAh/g discharge capacity compared with pristine LTO/TiO2 (550 mAh/g) after 15 cycles. Based on the obtained results, fabricated nanocomposites can be promising compounds to improve the electrochemical performance of lithium storage. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.