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Ni(OH) 2 derived from an MOF template was synthesized as an electrode material for supercapacitors. The electrochemical performance of the electrode was adjusted by effectively regulating the morphology of Ni(OH) 2 . The evolution of electrochemical performance of the electrode with morphology of Ni(OH) 2 was highlighted in detail, based on which honeycomb-like Ni(OH) 2 was successfully synthesized, and endowed the electrode with outstanding electrochemical performance. For the three-electrode testing system, honeycomb-like Ni(OH) 2 exhibited a very high specific capacitance (1865 F·g -1 at 1 A·g -1 , 1550 F·g -1 at 5 mV·s -1 ). Moreover, it also presented an excellent rate capability and cycling stability, due to 59.46 % of the initial value (1 A·g -1 ) being retained at 10 A·g -1 , and 172% of initial value (first circle at 50 mV·s -1 ) being retained after 20,000 cycles. With respect to the assembled hybrid supercapacitor, honeycomb-like Ni(OH) 2 also displayed superior electrochemical performance, with a high energy density (83.9 Wh·kg -1 at a power density of 374.8 W·kg -1 ). The outstanding electrochemical performance of Ni(OH) 2 should be attributed to its unique honeycomb-like structure, with a very high specific surface area, which greatly accelerates the transformation and diffusion of active ions.

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The Evolution in Electrochemical Performance of Honeycomb-Like Ni(OH)2 Derived from MOF Template with Morphology as a High-Performance Electrode Material for Supercapacitors