A cobalt-based metal–organic framework electrodeposited on nickel foam as a binder-free electrode for high-performance supercapacitors

Abstract

Cobalt-based metal-organic framework (Co-MOF) has been in-situ grown on nickel foam (NF) by cathodic electrodeposition using highly active cobalt surface modifier to enable uniform nucleation and tight growth of Co-MOF....

Hierarchical Columnar Cactus-like Co-MOF@NiCo-LDH Core–Shell Nanowrinkled Pillar Arrays for Supercapacitors with Ultrahigh Areal Capacitance

“…The ASC has an attractive energy density of 0.89 mWh cm –2 at a power density of 7.5 mW cm –2 and still has an energy density of 0.33 mWh cm –2 even at a power density of 75 mW cm –2 . This is better than that of previously emerged Co-MOF/NF//AC (0.21 mWh cm –2 at 3.76 mW cm –2 ), Ni­(OH) 2 //AC (0.49 mWh cm –2 at 16.50 mW cm –2 ), S–NiCo-LDH//AC (0.46 mWh cm –2 at 4.5 mW cm –2 ), Co 3 O 4 @Co-CH//AC (0.025 mWh cm –2 at 3.372 mW cm –2 ), Co 9 S 8 @PPy@NiCo-LDH//AC (0.132 mWh cm –2 at 0.80 mW cm –2 ), Co 3 O 4 @NiMoO 4 (0.249 mWh cm –2 at 1.6 mW cm –2 ), Ni­(OH) 2 @Ni 12 P 5 //AC (0.38 mWh cm –2 at 8 mW cm –2 ), NiCo-LDH@Ag//AC (0.079 mWh cm –2 at 0.785 mW cm –2 ), ZIF67/PPy//AC (0.058 mWh cm –2 at 3.01 mW cm –2 ), and NiCo-NH 2 -BDC-MOF//AC (0.81 mWh cm –2 at 1.60 mW cm –2 ), as shown in Figure e. The comparison of volume energy density with that of similar materials is shown in Table S3.…”

Mixed solvent-assisted synthesis of high mass loading amorphous NiCo-MOF as a promising electrode material for supercapacitors

“…5l, which were obtained according to the GCD curves of NiCo-MOF-2//AC. Impressively, the NiCo-MOF-2-based SSSC achieved a maximum energy density of 0.65 mW h cm −2 at a power density of 2 mW cm −2 , which is superior to other reported devices, such as NC LDH NSs@Ag@ CC//AC (40 μW h cm −2 at 12.1 mW cm −2 ), 64 Co(OH) 2 /CoOOH/Co 3 O 4 /Cu(OH) 2 //AC (196.1 μW h cm −2 at 1.6 mW cm −2 ), 65 Co 3 O 4 @NiMoO 4 //AC(0.17 mW h cm −2 at 16 mW cm −2 ), 66 Co-MOF/NF//AC (210 μW h cm −2 at 3761.2 μW cm −2 ), 67 NiCo-LDH//AC (31.1 μW h cm −2 at 3.5 mW cm −2 ), 68 Ni 1 Co 2 Al-LDHs@CC//AC (0.102 mW h cm −2 at 0.75 mW cm −2 ), 69 NiO/Ni(OH) 2 /PEDOT//CW/CMK (0.01 mW h cm −2 at 0.33 mW cm −2 ), 70 as well as close to the Co-MOF@NiCo-LDH//AC (0.89 mW h cm −2 at 7.5 mW cm −2 ), 71 and NiCo-NH 2 -BDC-MOF NS/NF//AC (0.81 mW h cm −2 at 1.6 mW cm −2 ) 72 based devices.…”

Electrosynthesis of a Nickel-Based Conductive Metal–Organic Framework with Controlled Morphology for Enhanced Capacitance

“…The first challenge is that thin films, rather than bulk powders obtained by conventional solvothermal synthesis, are the most practical form for EC-MOFs in electronic components. − Generally, MOFs lack straightforward solution processability, making homogeneous spin- and blade-coating techniques challenging. A lack of solution-phase processing techniques leads to inconsistent qualities of EC-MOF films and irreproducible device performance. , Second, the conventional method of preparing MOF inks for drop-casting often involves electrically insulating binders and conductive additives, obscuring the performance of the MOF itself. , Lastly, current syntheses of most EC-MOFs provide few options to directly control particle size and morphology on the surface of a substrate, which are both crucial parameters to optimize mass transport and active site accessibility. ,,,, Electrosynthesis of conductive MOFs presents an excellent opportunity to overcome the above challenges to synthesize highly tunable EC-MOF films.…”

“…15,16 Second, the conventional method of preparing MOF inks for drop-casting often involves electrically insulating binders and conductive additives, obscuring the performance of the MOF itself. 17,18 Lastly, current syntheses of most EC-MOFs provide few options to directly control particle size and morphology on the surface of a substrate, which are both crucial parameters to optimize mass transport and active site accessibility. 12,13,15,19,20 Electrosynthesis of conductive MOFs presents an excellent opportunity to overcome the above challenges to synthesize highly tunable EC-MOF films.…”