Reversible Na‐Ion Uptake in Si Nanoparticles

Silicon nanoparticles produced by expanding thermal plasma chemical vapor deposition show reversible electrochem­ical sodium uptake at room temperature. Sodiation of silicon occurs in a two-phase equilibrium reaction; whereas desodiation involves a solid solution of Na1−xSi (0 < x < 1). Silicon nanomaterials appear as promising anode materials for sodium-ion batteries for the first time. 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.