Electrochemical Performance of SnO₂ and SnO₂/MWCNT/Graphene Composite Anodes for Li-Ion Batteries

Abstract

In this study, tin oxide (SnO2) coatings on Cr coated stainless steel and multi-walled carbon nanotube (MW-CNT)/graphene substrates were prepared using a radio frequency magnetron sputtering process as anode materials in lithium-ion batteries.SnO2 thin film and SnO2/MWCNT/graphene composite were characterized with field-emission scanning electron microscopy, X-ray diffraction, and electrochemical tests (cyclic voltammetry and galvanostatic cycling).The electrochemical properties of SnO2 and SnO2/MWCNT/graphene composite anodes were studied using 2016-type coin cells assembled in an argon-filled glove box.The cells were cyclically tested on a MTI BST8-MA battery analyzer.The cyclic voltammograms of SnO2 anode and SnO2/MWCNT/graphene composite anode were obtained over the potential range of 0.05-3.0V and 0.05-2.5 V at a scan rate of 0.05 mV s -1 , respectively.