Selenium has been confined in the form of cyclic Se8 molecules within ordered mesoporous carbon for use as a cathode material in Li–Se batteries. An ex situ study of the Se cathode reveals conversion from cyclic Se8 molecules into chain-like Sen molecules upon cycling. This effectively eliminates the shuttle effect of Se, resulting in superior electrochemical performance in terms of volumetric capacity density and cycling stability. 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.

An Advanced Selenium–Carbon Cathode for Rechargeable Lithium–Selenium Batteries