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In‐situ transmission electron microscopy implemented with a microelectromechanical system (MEMS) heating device is invented by to investigate the electrochemical reactions of high temperature Na‐S batteries (reported by Yongfu Tang, Liqiang Zhang, Jianyu Huang and co‐workers in article number 2100846). The evolution of transient polysulfides is revealed. The studies provide not only new understanding...
Understanding polysulfide electrochemistry in high temperature sodium–sulfur (HT–Na–S) batteries is crucial for their practical applications. Currently the discharge capacity of commercial HT–Na–S battery achieves only one third of its theoretical capacity due to polysulfides formation, understanding of which is limited due to technical difficulty in direct imaging polysulfides. Herein, in situ transmission...
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