Lithiophilic bimetallic selenides in frameworks enable excellent lithium-ion conduction solid electrolyte interphase for high-performance lithium metal batteries

MOF-Derived Bimetallic Selenide CoNiSe2 Nanododecahedrons Encapsulated in Porous Carbon Matrix as Advanced Anodes for Lithium-Ion Batteries

“…Among TMCs, TMSes have attracted increasing interest in virtue of their narrower band gaps and line widths, higher electronic conductivity, and exceptional cycling and rate performance compared to TMSs. − In addition, the larger atomic diameter and more robust metallic properties of Se facilitate conversion reactions and increase the interlayer distance in layered TMSes, resulting in higher theoretical capacitance. − However, TMSes still suffer from certain drawbacks such as significant volume changes during Li + insertion/extraction and lower conductivity, leading to unsatisfactory cycling and rate performance, especially at high current densities. Nanostructure design and carbon modification are common strategies employed by researchers to address these challenges. − In addition, bimetallic selenides can offer improved electrochemical performance compared to single metal selenides. The introduction of a second metal component can better regulate the electronic structure of TMSes, enhance the conductivity through coupling and synergistic effects, and create a variety of phase interfaces and structural defects.…”