 2D emzines have shown remarkable properties for energy storage devices due to their metallic conductivity, abundant functional groups, unique layered microstructure, and ability to control interlayer spacing. Recent research has focused on developing diverse emzine-based materials with specific structures to enhance energy storage efficiency. Synthesis and fabrication strategies are discussed in this review along with energy storage applications such as supercapacitors, Li-ion batteries, Li-S batteries, and potential avenues. Challenges encountered in implementation are highlighted and future research directions and prospects are provided. This article was authored by Yun Lei Zhou, Lighting-Yin, Xuangfei Xiang, and others.