Energy-Saving Synthesis of MOF-Derived Hierarchical and Hollow Co(VO 3 ) 2 -Co(OH) 2 Composite Leaf Arrays for Supercapacitor Electrode Materials.

A one-step and energy-saving method was proposed to synthesize hierarchical and hollow Co(VO3 )2 -Co(OH)2 composite leaf arrays on carbon cloth, which expressed high capacitance (522 mF cm-2 or 803 F g-1 at the current density of 0.5 mA cm-2 ), good rate capability (79.5% capacitance retention after a 30-fold increase of the current density) and excellent cycling stability (90% capacitance retention after 15 000 charge-discharge cycles) when tested as a supercapacitor electrode.