<p>➀ MXenes are layered materials with excellent electrical conductivity and mechanical stability, promising for energy storage applications such as supercapacitors and batteries.</p><p>➁ Recent studies focus on the ion transport behaviors and potential in various electrochemical applications, including CO2 reduction and water splitting.</p><p>➂ Optimizing the structure and composition of MXenes can lead to substantial improvements in energy storage performance.</p>