Double‐Walled Sb@TiO2−x Nanotubes as a Superior High‐Rate and Ultralong‐Lifespan Anode Material for Na‐Ion and Li‐Ion Batteries

Double-walled Sb@TiO2−x nanotubes take full advantage of the high capacity of Sb, the good stability of TiO2−x, and their unique interaction, realizing excellent electrochemical performance both in lithium-ion batteries and sodium-ion batteries. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.