Sodium‐Ion Batteries In article number 2103716, Xin Wang, Zhongwei Chen and co‐workers propose a novel heterostructured nanoreactor which exhibits inlaid ultrafine oxygen deficient nanosized Nb2O5 inside mesoporous carbon via construction of a O‐Nb‐C heterointerface. The material serves as an anode for sodium‐ion batteries to realize a fast and durable sodiation/desodiation process. Moreover, the synergistic incorporation of the O‐Nb‐C heterointerface and defects further enhances electron transportation and enables highly reversible structure evolution over the course of electrochemical process.

Materials have always been a research hotspot in the chemical industry. With the continuous development of technology, the iteration of materials research has become faster and faster. Steel has strong toughness and tensile strength, and it is widely used in construction and other fields. However, one problem that cannot be avoided is the fracture of steel. The purpose of this paper is to analyze the damage and fracture of TWIP steel. In this paper, a microstructure characterization calculation method based on TWIP is proposed, which can effectively analyze the fracture surface, and for the performance of TWIP steel, this paper uses two different TWIP steels for comparative analysis. The results of this paper show that the HDI hardening rate of 22Mn0.6C TWIP steel is higher than that of 22Mn0.6C3Al TWIP steel.