Conductive 2D Metal‐Organic Frameworks Decorated on Layered Double Hydroxides Nanoflower Surface for High‐Performance Supercapacitor

Abstract

The conductive two-dimensional metal-organic framework (Ni-CAT) nanocones were decorated on the flower petals surface of layered double hydroxide (NiCo-LDH) based nanoflowers, just like the surface microstructure of lotus leaves. This interesting composite structure displays excellent specific capacitance of 882 F g À 1 at a current density of 1 A g À 1 , resulting from the synergistic between Ni-CAT and NiCo-LDH. An assembled asymmetric supercapacitor (ASC) using NiCo-LDH@Ni-CAT as positive electrode, which also diaplays high energy density of 23.5 Wh kg À 1 at power density of 394.6 W kg À 1 and long-term cycling stability up to 82% after 10,000 cycles. Therefore, this work demonstrates an excellent method of the designing and fabricating hybrid electrode materials based on conductive two-dimensional metal-organic frameworks and layered double hydroxides to apply in supercapacitors.

Effects of electrodeposition time on a manganese dioxide supercapacitor

“…In the recent years, scientists have been paying more and more emphasis to supercapacitors, which are regarded as renewable energy storage devices due to the advantages of rapid charging and discharging, high energy density, power density, outstanding rate performance, and long-term cycling stability performance. [3][4][5][6] Meanwhile, their applications in numerous elds have promising prospects, particularly in hybrid vehicles and military equipment. 7,8 In general, supercapacitors can be classied into two categories depending on the mechanism of energy storagepseudocapacitors (PCs) and electric double-layer capacitors (EDLCs).…”

Co3(hexahydroxytriphenylene)2: A conductive metal—organic framework for ambient electrocatalytic N2 reduction to NH3

“…The XRD pattern of the Co3HHTP2 powders is shown in Fig. 1(a), the two diffraction peaks at 4.68° and 9.56° are indexed to the (100) and (200) facets of Co3HHTP2, respectively, which indicate the stacked layered structure consistent with other MOFs composed of HHTP ligands [54]. FTIR spectra of HHTP ligands and Co3HHTP2 are shown in Fig.…”

Coupled Electrical Conduction in Coordination Polymers: From Electrons/Ions to Mixed Charge Carriers

“…[27] CPs with large surface area are proper candidate and have attracted much attention in recent years. [28] In 2014, a series of CPs were integrated as electrodes for supercapacitors. [29] The area capacitance of this CP-based electrode reached up to 5.09 mF cm À 2 .…”

“…Supercapacitors are known for high power density and excellent cycling stability, therefore play a vital role in the fields of electrical vehicles etc . CPs with large surface area are proper candidate and have attracted much attention in recent years . In 2014, a series of CPs were integrated as electrodes for supercapacitors .…”