Preparation and Electrochemical Performance of ZnO Films as Anode Materials for Li-Ion Batteries

Abstract

In this work, the eect of rf power on the structural, electrical and electrochemical properties of ZnO thin lms was investigated. ZnO thin lms were deposited on glass and Cr coated stainless steel substrates by rf magnetron sputtering in pure Ar gas environment. ZnO thin lms for dierent rf powers (75, 100, and 125 W) were deposited keeping all other deposition parameters xed. ZnO thin lms were used as negative electrode materials for lithium-ion batteries, whose charge-discharge properties, cyclic voltammetry and cycle performance were examined. A high initial discharge capacity about 908 mAh g −1 was observed at a 0.5 C rate between 0.05 and 2.5 V. The crystallographic structure of the sample was determined by X-ray diraction. The electrical resistivity of the deposited lms was measured by the four-point-probe method. The thickness of the ZnO thin lms was measured using a prolometer.

Optimizing Performance of ZnO Nanorod and Activated Carbon as a Composite Anode for Lithium-Ion Batteries

“…Electrochemical Impedance Spectroscopy (EIS) tests carried out on half cell batteries aim to obtain resistivity values from materials which are then used to determine the conductivity of the material [13]. Figure 4 shows a Nyquist plot that is fitted with an equivalent circuit using Zview software.…”