Morphologies of thienyl based bimetallic metal-organic frameworks controlled by solvents for high specific capacitance supercapacitor

Enhancing the energy storage performances of metal–organic frameworks by controlling microstructure

“…Following characterisation of the samples, electrode lms composed of Cu 3 (HHTP) 2 , acetylene black and PTFE in the ratio 85 : 10 : 5 were fabricated, as in previous studies. 22,30 SEM imaging conrmed that the microstructures observed in powdered samples were broadly maintained following lm formation (SI Fig. S7 †).…”

“…In contrast, C-CuHHTP displayed a significantly lower specific capacitance of 36 ± 6 F g −1 at 0.05 A g −1 , supporting previous reports that strongly agglomerated microstructures have lower capacitive performance and energy storage compared to samples with weaker particle agglomeration. 22,23 This is likely due to limited ionic diffusion through the spherical agglomerates, resulting in poor ion accessibility to the crystallites at the centre of the agglomerates.…”

“…17,18 While signicant work has examined the impact of pore structure on the capacitive performances of porous carbon materials and other families of electrically conductive MOFs, little work has been performed to understand how morphology impacts the performances of layered MOFs in supercapacitors. [19][20][21][22] This has hindered the development of layered MOFs for energy storage applications, with potential performance gains to be had from optimising the microstructure. One notable exception is the work of Dincȃ et al, which studied the inuence of sample microstructure on the capacitive performance of Ni 3 (HITP) 2 (HITP ¼ 2,3,6,7,10,11hexaiminotriphenylene) in three-electrode cells with 1 M KOH in water electrolyte.…”

Enhancing the Energy Storage Performances of Metal-Organic Frameworks by Controlling Microstructure

“…In contrast, C-CuHHTP displayed a signicantly lower specic capacitance of 36 AE 6 F g À1 at 0.05 A g À1 , supporting previous reports that strongly agglomerated microstructures have lower energy storage performances compared to samples with weaker particle agglomeration. 22,23 This is likely due to limited ionic diffusion through the spherical agglomerates, resulting in poor ion accessibility to the crystallites at the centre of the agglomerates.…”

Nickel(II) Cluster-Based Pillar-Layered Metal–Organic Frameworks for High-Performance Supercapacitors

“…Conductive metal–organic frameworks (MOFs) are promising electrode materials for supercapacitors because of their tunable structures, high specific surface areas, excellent conductivities, and abundant active sites. − They have received extensive attention in the field of energy storage in recent years. − However, studies on conductive two-dimensional (2D) MOFs are prevalent, whereas studies on three-dimensional (3D) MOFs are rarely reported. − Most 3D MOFs are nonconductive, owing to their ordered networks constructed via coordination bonds. The low electrical conductivities and poor electrochemical stabilities of the nonconductive 3D MOFs hindered their applications in supercapacitors. − Energy storage performance can be improved by increasing the specific surface areas of the MOFs, improving the conductivities of the MOFs, and increasing the number of heteroatoms on ligand molecules.…”