Activating Inert Metallic Compounds for High‐Rate Lithium–Sulfur Batteries Through In Situ Etching of Extrinsic Metal

Vacant defects bring activity to multimetallic alloys for cathode redox reactions in lithium–sulfur batteries. In their Communication (DOI: 10.1002/anie.201812062), J.‐Q. Huang et al. show that the introduction and in situ etching of an extrinsic metal to a monometallic compound activates the originally inert phase for kinetic propelling of polysulfide‐involving surface reactions at a high rate. Remarkable cycling stability is found at a high sulfur loading of 4.8 mg cm⁻².

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