Carbon Nanorings and Their Enhanced Lithium Storage Properties

A method involving catalytic growth of carbon nanorings (CNRs) with an outer diameter of ∼20 nm and axial length of ∼1 nm in the confined interlayer galleries of a layered double hydroxide host co-intercalated with a carbon source and charge-balancing anion is reported. The as-prepared CNRs with open tips and a ratio of length to diameter (L/d) of much less than 1 exhibit excellent lithium storage performance, especially large reversible specific capacity under high-rate charge and discharge. 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.