Metal–organic frameworks: a new promising class of materials for a high performance supercapacitor electrode

Abstract

A layered structure Ni-based MOF was firstly used as the electrode material for a supercapacitor and exhibited a large specific capacitance of 1127 F g−1 at 0.5 A g−1.

Facile synthesis of novel metal-organic nickel hydroxide nanorods for high performance supercapacitor

“…In comparison with the XRD spectrum of organic linker HOC 6 H 4 COONa (curve b), new diffraction peaks appeared at 6.05°, 11.88°, 13.79° and 21.82° for the Ni-based MOFs, corresponding to benzoate intercalated nickel hydroxide [15,[20][21][22].…”

“…Using a facile hydrothermal method, Zn-based and Cd-based MOFs were successfully synthesized, and their maximum specific capacitances were 23 and 22 F g -1 , respectively [14]. Layer-structured Ni-based MOFs were synthesized using p-benzenedicarboxylic acid as organic linker and achieved a specific capacitance of 1127 F g -1 at 0.5 A g -1 [15]. After the doping of Zn 2+ into the above layer-structured Ni-based MOFs, the specific capacitance can reach 1620 F g -1 at 0.25 A g -1 [16].…”

“…However, only layered leaflet like MOF materials have been utilized as electrode materials for supercapacitors [11][12][13][14][15][16], and new MOF materials with unique 1D nanostructures need to be further designed. In this paper, 1D Ni-based MOF nanorods with uniform morphology were successfully synthesized under mild conditions using salicylic acid as new organic linker and used as supercapacitor electrodes for the first time.…”

Recent advancements in metal organic framework based electrodes for supercapacitors

“…4) with a novel accordion morphology using the same organic ligand and metal ions as in Yang's report [50]. In a conventional three-electrode test cell, a specific capacitance of 988 F g −1 was achieved for Ni-MOF in 3 mol L −1 KOH at 1.4 A g −1 .…”

“…Yang et al [50] reported a high performance Ni-MOF-24 prepared by nickel chloride and p-benzodicarboxylic acid (PTA). The capacitance of Ni-MOF-24 was up to 1,127 F g −1 in 6 mol L −1 KOH electrolyte at the current density of 0.5 A g −1 .…”