Sodium Ion Batteries: Pulverization‐Tolerance and Capacity Recovery of Copper Sulfide for High‐Performance Sodium Storage (Adv. Sci. 12/2019)

Abstract

In article number 1900264 , Jong Min Yuk and co‐workers visualize four types of semi‐coherent boundaries formed during sodiation in copper sulfide utilizing high‐resolution transmission electron microscopy. The semi‐coherent boundaries do not only act as mechanical pillars for pulverization‐tolerance, but also provide additional sodium transport paths for capacity recovery. The novel sodiation mechanism enables exceptionally stable sodium storage in copper sulfide.