Special Issue on“Mxenes”

1.Summary and scope Since their discovery in 2011,MXenes have attracted considerable interest due to their unique combination of properties,such as metallic conductivity,hydrophilic nature,large interlayer spacing,and rich surface chemistries.MXenes have larger,adjustable interlayer spacing and rich surface chemistry(adsorbed functional groups on the surface and surface electronegativity),which makes MXenes distinguished from other two-dimensional materials.Dozens of MXene compositions have been produced by HF or molting salt etching of the Al-containing MAX phases.MXenes have shown useful and tunable electronic,optical,mechanical,and electrochemical properties,leading to applications ranging from energy storage,catalysis,sensing,and medicine.In light of this,comprehensive and systematic research efforts are invoked to thoroughly understand the subject matter and further advance this research field.