Journal Article EGaIn@C nanoparticles LiH Research Support, Non-U.S. Gov't Review all‐solid‐state lithium‐sulfur batteries batteries conduction mechanism core-shell structures electrochemical‐mechanical failure electron and ion transport fuel cells hierarchical carbon nanocages high-rate performance in situ TEM inorganic components liquid metal alkali-ion batteries lithium-ion batteries multi‐dimensional structural engineering niobium pentoxide anodes operando X-ray diffraction operando transmission electron microscopy self-healing self‐decomposition solar cells solid‐electrolyte interphase transmission electron microscopy triple‐phase interface