Mesoporous uniform ammonium nickel phosphate hydrate nanostructures as high performance electrode materials for supercapacitors

High capacitive amorphous barium nickel phosphate nanofibers for electrochemical energy storage

“…9 Inspired by this work, various phosphates containing different cations or cation combinations like nickel, cobalt, ammonium and sodium, have been synthesized by hydrothermal method. [10][11][12][13][14][15] Most metal phosphates have a layered structure. This unique structure characteristic is desired for applications such as energy storage devices which require fast transport of ions.…”

Bullet-like microstructured nickel ammonium phosphate/graphene foam composite as positive electrode for asymmetric supercapacitors

“…The higher specic energy of Ni(NH 4 ) 2 (PO 3 ) 4 $4H 2 O/60 mg GF//ppAC asymmetric device was obtained to be 52 Wh kg À1 with a specic power of 861 W kg À1 at 1 A g À1 which are much better than the values reported in the literature. 5,[22][23][24][52][53][54][55] The phase angle vs. frequency for the Ni(NH 4 ) 2 (PO 3 ) 4 $4H 2 O/60 mg GF//ppAC asymmetric device in Fig. 9(b) shows the phase angle value of about À83 .…”

“…Transition/Ammonium phosphates based materials (NH 4 -$MPO 4 $H 2 O) (M ¼ Mn 2+ , Cu 2+ , Co 2+ , Ni 2+ ) have been widely used over 50 years as fertilizers, only a few studies have been established on Transition/Ammonium phosphates based materials as electrodes for supercapacitors. 22,23,49,50 For Instance, Huan Pang et al 24 synthesized NH 4 CoPO 4 $H 2 O micro bundle using a hydrothermal approach. The samples were tested in both three and two-electrode measurement using 3 M KOH aqueous electrolyte.…”

Self‐Assembly Assisted Fabrication of Nanoporous Nickel (II) Phosphate Octahydrate Microspheres Catalyst with Orange Peel Surface toward Urea Oxidation

“…The aim of all synthesis procedures is to retard the rapid condensation reactions of the inorganic precursors, which lead to the formation of bulk materials and uncontrolled phase separation between the organic and inorganic components. Although there are a few reports published on the successful synthesis of nanoporous metal phosphate with controlled shapes such as those that are long hollow tubular, plates, and rod structure, hexahedron and flower‐like, and almonds‐like …”