AUTHOR=Shen Ao , Zhang Ziying , Zhang Huizhen , Zhao Yangqiang , Xu Pingping , Zhou Yangyang , Weng Ying TITLE=Core-Etched CC/SnO2 Nanotube Arrays as High-Performance Anodes for Lithium-Ion Batteries With Ionic Liquid Electrolyte JOURNAL=Frontiers in Materials VOLUME=7 YEAR=2020 URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2020.00063 DOI=10.3389/fmats.2020.00063 ISSN=2296-8016 ABSTRACT=

Despite the design of nano-structured SnO2 anodes has attracted much attention because of its high theoretical capacity, good electron mobility, and low potential of lithium-ion intercalation, challenges remain due to their weak mechanical stability, complex processing and rapid capacity decay. The one-dimensional binder-free porous CC/SnO2 nanotube arrays are synthesized with a well-suited core etching method to meet the needs of steady operation of flexible devices under mechanical deformation. This porous, binder-free nanostructure has large contact area with the electrolyte and excellent electron transport performance. The electrochemical measurements demonstrate that these nanotube arrays have high energy density and high-rate capability. After 500 cycles at a current density of 200 mA g−1, their stable capacity remains at 595.7 mA h g−1.