Mn-MOF derivative/carbonized PAN composite coating with a 3D network structure as a self-supported anode for lithium-ion batteries

In this paper, Cu-supported Mn-MOF derivative/carbonized PAN composite coating was successfully synthesized by a simple coating route and a subsequent annealing treatment. The coating with a thickness of 15 μm has a 3D network structure constructed by connecting branches. The branches have a unique structure with dispersed Mn-MOF derivative particles encapsulated in the carbonized PAN matrix. As a self-supported anode, the coating delivers a capacity of 961 mAh g−1 at a current density of 0.1 A g−1. Even at a high current density of 2 A g−1, it still maintain a high capacity of 439 mAh g−1. Its high electrochemical performance is attributed to its 3D network structure, large specific surface area, abundant pore structure, non-agglomerated Mn-MOF derivative particles encapsulated in carbonized PAN matrix, and the merits of self-supported electrode.