A Hierarchical N/S‐Codoped Carbon Anode Fabricated Facilely from Cellulose/Polyaniline Microspheres for High‐Performance Sodium‐Ion Batteries

Hierarchical N/S-codoped carbon microspheres with expanded interlayer distance and enhanced conductivity are fabricated facilely from cellulose/polyaniline composite in a "green" and low-cost route. This material achieves a high reversible capacity of ≈280 mA h g−1 at 30 mA g−1 and superior rate performance of ≈130 mA h g−1 at 10 A g−1, and ultralong cycle life of more than 3000 cycles as an anode material for sodium-ion batteries, holding great promise for economic large-scale energy storage. 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.