Research progress of cobalt selenide anode materials for metal‐ion battery

Abstract As the demand for large‐scale energy storage systems increases, so do market expectations for battery performance, especially in electrochemical properties. Against this background, electrode materials with excellent theoretical capacity and unique structures, such as cobalt selenide (CoSe 2 ), have received significant attention from the research community for their potential in large‐scale energy storage systems. These materials exhibit excellent electrochemical properties, including long cycle life, high stability, high energy density, and efficient charge/discharge performance. However, CoSe 2 anode materials still face volume expansion and conductivity degradation in practical applications, affecting battery performance and lifetime. To address these challenges, researchers have proposed a variety of innovative strategies. This paper provides an in‐depth evaluation of these strategies and analyzes their potential for practical applications. It is shown that by designing special structural materials, shortening the ion migration path, and increasing the contact area, the electrochemical performance can be effectively enhanced and the performance degradation caused by volume change can be suppressed. With technological advances, it is expected that battery performance will be significantly improved, driving the development of more efficient and environmentally friendly energy solutions.