Silica Restricting the Sulfur Volatilization of Nickel Sulfide for High‐Performance Lithium‐Ion Batteries

Nickel sulfides are regarded as promising anode materials for advanced rechargeable lithium‐ion batteries due to their high theoretical capacity. However, capacity fade arising from significant volume changes during operation greatly limits their practical applications. Herein, confined NiS x @C yolk–shell microboxes are constructed to address volume changes and confine the active material in the internal void space. Having benefited from the...