Armoring Graphene Cathodes for High‐Rate and Long‐Life Lithium Ion Supercapacitors

An armored graphene cathode is developed for high rate and long-life lithium ion supercapacitors by the preliminary electrochemical coating. The obtained full-cell delivers a high energy density of 160 Wh kg−1 and a very small capacity decay of 0.011% per cycle indicating a potential prospect. 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.