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Gallium‐based metallic liquids, exhibiting high theoretical capacity, are considered a promising anode material for room‐temperature liquid metal alkali‐ion batteries. However, electrochemical performances, especially the cyclic stability, of the liquid metal anode for alkali‐ion batteries are strongly limited because of the volume expansion and unstable solid electrolyte interphase film of liquid...
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...
Understanding the structural evolution of Li2S upon operation of lithium‐sulfur (Li‐S) batteries is inadequate and a complete decomposition of Li2S during charge is difficult. Whether it is the low electronic conductivity or the low ionic conductivity of Li2S that inhibits its decomposition is under debate. Furthermore, the decomposition pathway of Li2S is also unclear. Herein, an in situ transmission...
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