A metal-organic framework with mixed electron donor and electron acceptor ligands for efficient lithium-ion storage.

Electron donor tetrathiafulvalene (TTF) and electron acceptor naphthalene diimide (NDI) derivatives were used to synthesize a 3D Zn-TTF/NDI-MOF. Multiple redox active sites and charge transfer endow the pristine MOF anode with excellent rate behavior and long term cycling performance (with an average specific capacity of 956 mA h g ^-1 at 1 A g ^-1 over 600 cycles). This study highlights the great potential of elaborately-designed MOFs for developing efficient anode materials.