Bimetallic phosphosulfide Zn–Ni–P–S nanosheets as binder-free electrodes for aqueous asymmetric supercapacitors with impressive performance

Abstract

Although Ni–P based metal phosphides have high theoretical specific capacity, the poor rate capability and cycling stability hinder their practical application.

Design and Fabrication of Hierarchical NiCoP–MOF Heterostructure with Enhanced Pseudocapacitive Properties

“…The derived energy and power densities are plotted in Figure 6d. The maximum energy density of 50.3 Wh kg −1 is delivered at a power density of 1011.2 W kg −1 , which is superior to some other HSCs in literatures, including CoNi–MOF//AC, [ 24 ] NiCoP nanoplates//graphene, [ 37 ] Co 0.1 Ni 0.9 P/CNF/CC||AC/CC, [ 44 ] NiCoP/NiCo‐OH30//PC, [ 54 ] ZnNiCoPNF//AC, [ 60 ] NC@SS//Fe 2 O 3 @SS, [ 61 ] P(Ni,Co)Se 2 //ZC, [ 62 ] NiCo 2 S 4 /GA//AC, [ 63 ] ZnNiPS//AC, [ 64 ] NiCoPCoP//PNGF, [ 65 ] and β‐FeOOH//NiCo hydroxides/Cu(OH) 2 /CF. [ 66 ] This device also displays a power density as high as 10 550.3 W kg −1 at 29.7 Wh kg −1 within 11 s, showing a high‐power nature.…”

Interconnected network‐like single crystalline bimetallic carbonate hydroxide nanowires for high performance hybrid supercapacitors

“…The obtained results are higher or even comparable than those of the previous reports (Table S1). 23,25,29,35,[39][40][41][42][43][44][45][46][47][48][49]…”

3D hierarchical core–shell spiny globe shaped Co2P@Ni2P/NiCo2O4@CoO for asymmetric supercapacitors

“…S7 †). 8 Another three peaks observed at 20.83 , 35.56 , and 32.31 could be indexed to orthorhombic Co(OH)F (JCPDS no. 50-0827).…”

“…6 Therefore, ASCs have the potential to be high-energy storage systems. 7,8 Rational design of the composition and morphology of the electrode materials could enhance the performance of ASCs maximally. First, traditional multivalent transition metal (Co, Ni, Mn, and Fe) based oxides and phosphates are excellent energy storage candidates for high-performance ASCs featuring high theoretical capacitances (>1000 F g À1 ) and low cost.…”