Phase Separation of Li2S/S at Nanoscale during Electrochemical Lithiation of the Solid‐State Lithium–Sulfur Battery Using In Situ TEM

S/Li2S phase separation at nanoscale is observed for the first time in the solid-state Li–S battery by using in situ transmission electron microscopy. This nanophase separation not only reduces the diffusion distance but also provides the S/Li2S interfaces network, which is favorable for electron and Li+ ion transportation during the lithiation process. 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.