Ultrahigh capacity 2D anode materials for lithium/sodium-ion batteries: an entirely planar B7P2 monolayer with suitable pore size and distribution

We propose that porous 2D materials with entirely planar structure and proper pore sizes are highly promising ultrahigh capacity anode materials for LIBs and SIBs, following which the B₇P₂ monolayer is identified with an ultrahigh capacity of 3117 mA h g⁻¹.