A High Energy Lithium‐Sulfur Battery with Ultrahigh‐Loading Lithium Polysulfide Cathode and its Failure Mechanism

An ultrahigh-loading lithium polysulfide cathode is developed to investigate the electrochemical behaviors of high-energy Li-S batteries. With this design, Li-S batteries with an ultrahigh areal sulfur loading (18.1 mg cm–2) are achieved with low polarization, high areal capacity, and promising cycling performance. It is further demonstrated that the challenge for high sulfur loading cells is the serious lithium-metal corrosion and electrolyte depletion. 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.