Two-dimensional covalent organic frameworks made of triquinoxalinylene derivatives are promising anodes for high-performance lithium and sodium ion batteries

with an average open circuit voltage of 0.80 and 0.67 V for LIBs and SIBs, respectively, which is comparable to that of the most advanced inorganic anode materials. Composed of only light elements, the designed 2D COFs are predicted to be promising anode materials with high energy density, good conductivity and high-rate performance for sustainable LIBs and SIBs.