Effects of oxygen vacancies on the electrochemical performance of tin oxide

作者：Na Li, Kui Du, Gang Liu, Yingpeng Xie, Guangmin Zhou, Jing Zhu, Feng Li, Hui–Ming Cheng · 发表于：Journal of Materials Chemistry A · 年份：2012 · DOI：10.1039/c2ta01012g · 被引用次数：158 · 研究领域：ZnO doping and properties、Transition Metal Oxide Nanomaterials、Gas Sensing Nanomaterials and Sensors

Using an aberration-corrected transmission electron microscope, we observed the oxygen vacancies, profiled the concentration in the SnO2−δ nanocrystals on an atomic scale, and estimated the amount of oxygen vacancies to be ca. 3.3 atom%. The SnO2−δ nanocrystals show much improved initial Coulombic efficiency, rate capability and specific capacity compared with stoichiometric SnO2 when used as an anode material for lithium ion batteries.