Design of Sb2Se3-based nanocomposites for high-performance alkali metal ion batteries driven by a hybrid charge storage mechanism

Sb2Se3 with abundant resources and high theoretical capacity possesses conversion and alloying reaction mechanism, and hence has been developed as promising anode materials for alkali metal ion batteries. However, the drastic volumetric change and sluggish kinetics of Sb2Se3-based material result in a rapid capacity fading at high current density, which restrict the practical application. Various strategies have been used to resolve these challenges by doping, designing nanostructured Sb2Se3 anodes with various morphologies, and constructing Sb2Se3-based composites. In this review, the new research advances in the redox reaction mechanisms, morphology design, and structure-performance relation of Sb2Se3-based anode materials for alkali metal ion batteries are comprehensively summarized. The major objective of this review is to explore the determining factors influencing the lithium (sodium and potassium) storage performance of Sb2Se3-based anode materials, and thus highlight promising strategies to enhance reversible capacity and cycling stability, especially at large current densities. At last, the insight into the future progress, challenge, and prospect of Sb2Se3-based anode materials for alkali metal ion batteries is proposed. This review can provide a specific viewpoint for the construction and optimization Sb2Se3-based anode materials, then can clarify the future reformation in Sb2Se3-based anode materials and promote the rapid progress and practical applications.