Morphology Controlled Synthesis of Nickel Cobalt Oxide for Supercapacitor Application with Enhanced Cycling Stability

Zhao, Yufeng; Zhang, Xuejiao; He, Jing; Zhang, Long; Xia, Meirong; Gao, Faming

doi:10.1016/j.electacta.2015.05.162

Cited by 60 publications

(11 citation statements)

References 40 publications

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“…This journal is © The Royal Society of Chemistry 2019 RSC Adv., 2019, 9, 1115-1122 | 1119 À1 ),46 NiCo 2 O 4 nanosheets-like (899 F g À1 at the current density of 1 A g À1 ), 47 NiCo 2 O 4 nanoakes (1270 F g À1 at the current density of 1 A g À1 ),48 NiCo 2 O 4 nanoneedles nanostructure (1427 F g À1 at the current density of 8 A g À1 ),49 NiCo 2 O 4 hollow microspheres (764 F g À1 at a current density of 2 A g À1 ),50 and chain-like NiCo 2 O 4 nanowires (1284 F g À1 at the current density of 2 A g À1 ) 51. …”

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confidence: 99%

Enhanced electrochemical performance of nanoplate nickel cobaltite (NiCo₂O₄) supercapacitor applications

2019

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Enhanced electrochemical performance of nanoplate nickel cobaltite (NiCo₂O₄) supercapacitor applications

2019

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“…In the present study the influence of nanoscaling on the solubility range of nickel cobalt oxides is investigated. Ni/Co‐O compounds have attracted great interest in many energy‐related fields and find applications as anodes in lithium ion batteries, as supercapacitors or as electrocatalysts for water splitting . Ni x Co 1− x O is known to be among the most active nonprecious electrocatalysts for the overall water splitting in alkaline media comprising both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) …”

Section: Introductionmentioning

confidence: 99%

Rock Salt Ni/Co Oxides with Unusual Nanoscale‐Stabilized Composition as Water Splitting Electrocatalysts

Fominykh

Tok

Zeller

et al. 2017

Adv Funct Materials

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The influence of nanoscale on the formation of metastable phases is an important aspect of nanostructuring that can lead to the discovery of unusual material compositions. Here, the synthesis, structural characterization, and electrochemical performance of Ni/Co mixed oxide nanocrystals in the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is reported and the influence of nanoscaling on their composition and solubility range is investigated. Using a solvothermal synthesis in tert-butanol ultrasmall crystalline and highly dispersible Ni x Co 1−x O nanoparticles with rock salt type structure are obtained. The mixed oxides feature non-equilibrium phases with unusual miscibility in the whole composition range, which is attributed to a stabilizing effect of the nanoscale combined with kinetic control of particle formation. Substitutional incorporation of Co and Ni atoms into the rock salt lattice has a remarkable effect on the formal potentials of NiO oxidation that shift continuously to lower values with increasing Co content. This can be related to a monotonic reduction of the work function of (001) and (111)-oriented surfaces with an increase in Co content, as obtained from density functional theory (DFT+U) calculations. Furthermore, the electrocatalytic performance of the Ni x Co 1−x O nanoparticles in water splitting changes significantly. OER activity continuously increases with increasing Ni contents, while HER activity shows an opposite trend, increasing for higher Co contents. The high electrocatalytic activity and tunable performance of the nonequilibrium Ni x Co 1−x O nanoparticles in HER and OER demonstrate great potential in the design of electrocatalysts for overall water splitting.

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“…The main contents of Ni1Co2, Ni1Co2-AN, Ni3, Ni2Co1 and Co3 were unitary Ni/Co or binary Ni-Co hydroxides. The energy storage mechanism could be described as follows: [49][50][51][52][53][54] Ni(OH) 2 + OH À 4 NiOOH + e À (1)…”

Section: Electrochemical Capacitive Behaviours Of Various Electrodesmentioning

confidence: 99%

Flowery nickel–cobalt hydroxide via a solid–liquid sulphur ion grafting route and its application in hybrid supercapacitive storage

Bao

Zhao

et al. 2018

RSC Adv.

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Morphology Controlled Synthesis of Nickel Cobalt Oxide for Supercapacitor Application with Enhanced Cycling Stability

Cited by 60 publications

References 40 publications

Enhanced electrochemical performance of nanoplate nickel cobaltite (NiCo₂O₄) supercapacitor applications

Enhanced electrochemical performance of nanoplate nickel cobaltite (NiCo₂O₄) supercapacitor applications

Rock Salt Ni/Co Oxides with Unusual Nanoscale‐Stabilized Composition as Water Splitting Electrocatalysts

Flowery nickel–cobalt hydroxide via a solid–liquid sulphur ion grafting route and its application in hybrid supercapacitive storage

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Morphology Controlled Synthesis of Nickel Cobalt Oxide for Supercapacitor Application with Enhanced Cycling Stability

Cited by 60 publications

References 40 publications

Enhanced electrochemical performance of nanoplate nickel cobaltite (NiCo2O4) supercapacitor applications

Enhanced electrochemical performance of nanoplate nickel cobaltite (NiCo2O4) supercapacitor applications

Rock Salt Ni/Co Oxides with Unusual Nanoscale‐Stabilized Composition as Water Splitting Electrocatalysts

Flowery nickel–cobalt hydroxide via a solid–liquid sulphur ion grafting route and its application in hybrid supercapacitive storage

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Enhanced electrochemical performance of nanoplate nickel cobaltite (NiCo₂O₄) supercapacitor applications

Enhanced electrochemical performance of nanoplate nickel cobaltite (NiCo₂O₄) supercapacitor applications