Direct growth of 2D nickel hydroxide nanosheets intercalated with polyoxovanadate anions as a binder-free supercapacitor electrode

Abstract

Layered Ni(OH)2 intercalated with polyoxovanadate anions was built using a chemical solution deposition method.

Two‐Dimensional Layered Hydroxide Nanoporous Nanohybrids Pillared with Zero‐Dimensional Polyoxovanadate Nanoclusters for Enhanced Water Oxidation Catalysis

“…Preparation of the Ni(OH) 2 –POV Nanohybrids : The Ni(OH) 2 −POV nanohybrid thin films were synthesized using a CSG method similar to our previous report . Typically, a 0.1 m aqueous solution of nickel (II) chloride (NiCl 2 ) was complexed via the addition of ammonium hydroxide (NH 4 OH).…”

“…In the present work, mesoporous layer‐by‐layer‐ordered Ni(OH) 2 ‐based nanohybrids intercalated with 0D POV nanoclusters are synthesized using a bottom‐up chemical solution growth (CSG) method (the intercalative nanohybrids are denoted “NHV”) similar to our previous report . The effects of the POV‐intercalative hybridization on the electrocatalytic OER activity and the surface area of the pristine Ni(OH) 2 material are investigated with the accompanying variations in the crystal structures and physicochemical properties.…”

“…Although several types of hybrids with Ni hydroxide and low‐dimensional nanostructured materials have been studied, the direct synthesis of a hybrid OER electrocatalyst that is composed of 0D POM intercalated Ni(OH) 2 has been rarely reported. In one instance, we explored intercalation of polyoxovanadate (POV) anions in a nickel hydroxide lattice with well‐defined dimensions and cluster charges is achieved by chemical bath deposition and used for the supercapacitor application …”

Polyoxometalates: Tailoring metal oxides in molecular dimension toward energy applications

“…Also, the rod‐like Na 6 [V 10 O 28 ]·16H 2 O compounds exhibit decent sodium‐ion storage performance . Besides, polyoxovanadate directs the growth of two‐dimensional hydroxide nanosheets, leading to desired porosity and an charge reservoir for capacitor application, and polyoxovanadate containing iron is synthesized to form polyoxovanadate‐alkoxide cluster and ensure large amount of electron transfer …”

Hydrothermal Synthesis of NiCo2O4/CoMoO4 Nanocomposite as a High‐Performance Electrode Material for Hybrid Supercapacitors

“…[17] Moreover, the largest area enclosed by CV curve of NiCo 2 O 4 /CoMoO 4 NSs implies superior capacitive property and distinct increase of specific capacitance. [18] This is mainly attributed to the synergistic effect of hierarchically connected NiCo 2 O 4 and CoMoO 4 NSs. Figure 4bdisplays CV curves of 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 NiCo 2 O 4 /CoMoO 4 at scan rates of 10-50 mV.…”