Electrochemical-induced surface reconstruction to NiFe-LDHs-based heterostructure as novel positive electrode for supercapacitors with enhanced performance in neutral electrolyte

NiCo layered double hydroxide nanocages for high-performance asymmetric supercapacitors

“…The maximum energy of NiCo-LDH-1//AC is 59.0 W h kg −1 when the power density is 935.7 W kg −1 . Compared with other similar supercapacitors, such as HKUST-1@CoNi-LDH//AC, 57 Ni 2 P/NiGa 2 O 4 /NiGa-LDH//Co 3 O 4 -C, 58 Co-NiMn-LDH@V 2 C//V 2 C, 59 NiMn-LDH@CuO//AC, 60 CoAlNi-LDH-NR//AC, 61 CoS x /Ni–Co LDH//AC, 62 NiAl-LDH-OA-2//AC, 63 NiCoP@NiCo-LDH//AC, 64 CCCH@NiCo-LDH@Au-CuO/Cu//VN, 65 NiCo 2 Al-LDH//CC@ZPC, 66 NiFe-LDH/NiOOH//MoS 2 /rGO, 67 and NiAl-LDH/rGO//AC, 68 the energy storage performance of the NiCo-LDH-1//AC hybrid supercapacitor is significantly higher. The detailed parameters of the comparison are listed in Table S1 †…”

“…The results clearly show that when the operating voltage is higher than 1.60 V, a significant increase in current caused by polarization occurs; therefore, the stable voltage window of the NiCo-LDH-1//AC device is established to be 0-1.60 V. The CV curves of the NiCo-LDH-1//AC device (Fig. 6 Co-NiMn-LDH@V 2 C//V 2 C, 59 NiMn-LDH@CuO//AC, 60 CoAlNi-LDH-NR//AC, 61 CoS x /Ni-Co LDH//AC, 62 NiAl-LDH-OA-2// AC, 63 NiCoP@NiCo-LDH//AC, 64 CCCH@NiCo-LDH@Au-CuO/ Cu//VN, 65 NiCo 2 Al-LDH//CC@ZPC, 66 NiFe-LDH/NiOOH//MoS 2 / rGO, 67 and NiAl-LDH/rGO//AC, 68 the energy storage performance of the NiCo-LDH-1//AC hybrid supercapacitor is significantly higher. The detailed parameters of the comparison are listed in Table S1.…”

“…In recent years, metal hydroxides have shown promising potential in supercapacitors, [6][7][8][9] mainly because of their potential for tailoring constituents, high cation dispersion, richness of redox reactions, and good electrochemical properties. [10][11][12] Compared with single metal hydroxides, bimetallic layered hydroxides have shown excellent performance as electrode materials for supercapacitors due to their theoretically high specific capacitance, rich redox states, and large interlayer charge transfer spacing. [13][14][15] Among them, nickel-cobalt layered double hydroxides have attracted the attention of many researchers because of the synergistic effect between the high theoretical capacitance of Ni(OH) 2 and the high conductivity of Co(OH) 2 .…”

Progress of layered double hydroxide-based materials for supercapacitors

“…An intriguing heterostructure electrode material of NiFe-LDHs was fabricated by Zhang et al 238 using a high-voltage electrochemical cycle activation (ECA) technique (Fig. 17(j)).…”

Trimesic acid anchored electrocatalysts of bioinspired design: Unique static and dynamic compatibility enhanced water oxidation

“…5 For example, nickel-iron layered double hydroxides (NiFe-LDH), by virtue of the unique 2D lamellar structure and manageable electronic structure, have shown the optimal oxygen evolution reaction (OER) performance. 6,7 However, the minimum overpotential of NiFe-LDH is limited by the scaling relationship among the binding energies of *O, *OH and *OOH (* means the adsorbed state) according to its adsorbate evolution mechanism. 8 Traditional strategies such as morphology regulating, vacancy steering and dopant modi cation are successful to improve the activity.…”