Date of Award
Master of Science
Junhong Chen, Benjamin Church, Deyang Qu
Electrochemistry, Lithium-Ion Batteries, Nanoparticles, Tin Anode, Titanium Oxide Shell
Tin, an anode material with a high capacity for lithium-ion batteries, has poor cyclic performance because of the high volume expansion upon lithiation. Based on a literature review of the applications of lithium-ion batteries and current research progress of the tin-based anode materials for lithium-ion batteries, we developed a method to synthesize hollow TiO2 spheres with tin nanoparticles anchored on the inner surface of the TiO2 shell. Such a unique tin/TiO2 composite alleviates the volume change of tin–based anode materials in charge-discharge processes. SnCl2·2H2O (Tin (II) chloride dihydrate) and titanium (IV) isopropoxide (TIPT) were used as the Sn source and the Ti source, respectively, while CaCO3 was used as a template to fabricate the TiO2 hollow shell. A variety of modern material testing methods (XRD, SEM, XPS, Raman, BET, etc.) and electrochemical measurements such as galvanostatic charge-discharge and cyclic voltammetry (CV) testing were employed to systematically study effects of various synthesis parameters on the structure and battery performance of the as-prepared materials. We also discussed the key factors influencing the cycle performance of the composite electrode material and the related mechanism.
Pan, Xiang, "Tin Nanoparticles Encapsulated in Hollow TIO2 Spheres as High Performance Anode Materials for Li-Ion Batteries" (2015). Theses and Dissertations. 979.