A three-dimensional Mn-based MOF as a high-performance supercapacitor electrode.

Developing new high-performance electrode materials for improving the energy density of supercapacitors is an important task. Herein, a new three-dimensional (3D) metal-orgainc framework (MOF) [Mn(BGPD)(H 2 O) 2 ] (Mn-BGPD; BGPD = N , N '-bis(glycinyl)pyromellitic diimide) was synthesized. When Mn-BGPD is used as the electrode material of supercapacitors, in a three-electrode setup, it shows an outstanding specific capacitance of 832.6 F g -1 at a current density of 1 A g -1 . The asymmetrical supercapacitor of Mn-BGPD shows an attractive specific capacitance of 100 F g -1 at 1 A g -1 , which corresponds to an excellent energy density of 35.5 W h kg -1 . Moreover, better cycling stability with a capacitance retention of 46.7% is also shown. The high electrochemical performance makes Mn-BGPD a very promising electrode material for supercapacitors.