Hierarchical carbon nanotube/α-Ni(OH)2 nanosheet composite paper with enhanced electrochemical capacitance

Wang, Linong; Chen, Hong‐Yuan; Cai, Feng; Chen, Minghai

doi:10.1016/j.matlet.2013.10.027

Cited by 29 publications

(13 citation statements)

References 11 publications

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“…3b. The theoretical capacitances of NiO are 2584 F g À1 within a potential width of 0.5 V [7,16]. Therefore, the present MWCNTs/NiO nanocomposites provide a capacitance very close to the theoretical values.…”

Section: Resultssupporting

confidence: 73%

Electrodes from carbon nanotubes/NiO nanocomposites synthesized in modified Watts bath for supercapacitors

Hakamada

Abe

Mabuchi

2016

Journal of Power Sources

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h i g h l i g h t sNiO with diameter <4 nm was deposited on multiwalled carbon nanotubes. Pseudocapacitance per mass of NiO of the nanocomposite electrode was very high. Modified Watts bath was effective for the size reducing of Ni species. a b s t r a c t A modified Watts bath coupled with pulsed current electroplating is used to uniformly deposit ultrafine nickel oxide particles (diameter < 4 nm) on multiwalled carbon nanotubes. The capacitance of the multiwalled carbon nanotubes/nickel oxide electrodes was as high as 2480 F g À1 (per mass of nickel oxide), which is close to the theoretical capacitance of NiO.

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Section: Resultssupporting

confidence: 73%

Electrodes from carbon nanotubes/NiO nanocomposites synthesized in modified Watts bath for supercapacitors

Hakamada

Abe

Mabuchi

2016

Journal of Power Sources

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“…In this current paper, 80 scientific papers describing new Ni(OH) 2 or NiO-based electrodes for supercapacitor [12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,…”

Section: Methodsmentioning

confidence: 99%

Ni(OH)2 and NiO Based Composites: Battery Type Electrode Materials for Hybrid Supercapacitor Devices

et al. 2018

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Nanocomposites of Ni(OH)2 or NiO have successfully been used in electrodes in the last five years, but they have been falsely presented as pseudocapacitive electrodes for electrochemical capacitors and hybrid devices. Indeed, these nickel oxide or hydroxide electrodes are pure battery-type electrodes which store charges through faradaic processes as can be shown by cyclic voltammograms or constant current galvanostatic charge/discharge plots. Despite this misunderstanding, such electrodes can be of interest as positive electrodes in hybrid supercapacitors operating under KOH electrolyte, together with an activated carbon-negative electrode. This study indicates the requirements for the implementation of Ni(OH)2-based electrodes in hybrid designs and the improvements that are necessary in order to increase the energy and power densities of such devices. Mass loading is the key parameter which must be above 10 mg·cm−2 to correctly evaluate the performance of Ni(OH)2 or NiO-based nanocomposite electrodes and provide gravimetric capacity values. With such loadings, rate capability, capacity, cycling ability, energy and power densities can be accurately evaluated. Among the 80 papers analyzed in this study, there are indications that such nanocomposite electrode can successfully improve the performance of standard Ni(OH)2 (+)//6 M KOH//activated carbon (−) hybrid supercapacitor.

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“…In the literature, the synthesis of hybrids Ni(OH) 2 /nanocarbons (nanotubes, graphene, …) is amply described, primarily for applications towards electrochemical energy storage . According to the synthesis method used α‐Ni(OH) 2 or β‐Ni(OH) 2 phases are obtained . In Figure , XRD patterns of Ni(OH) 2 ‐SW, Ni(OH) 2 ‐MW, Ni(OH) 2 ‐Cel, and Ni(OH) 2 are reported.…”

Section: Resultsmentioning

confidence: 97%

The Influence of Sacrificial Carbonaceous Supports on the Synthesis of Anhydrous NiF₂Nanoparticles

et al. 2016

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We report a multistep synthesis of anhydrous NiF 2 nanoparticles using Single Walled Carbon Nanotubes (SWCNT), Multi Walled Carbon Nanotubes (MWCNT) and cellulose as sacrificial supports. The synthesis method includes precipitation at the surface of carbonaceous supports, followed by gas-solid treatments under air and pure molecular fluorine. The as-prepared nanoparticles exhibit different particle size distributions depending on the initial support from~20 nm with SWCNT up tõ 60 nm with cellulose. The carbonaceous matrices act as sacrificial supports and are totally removed under fluorine gas. The influence of carbonaceous supports on the as-obtained nanoparticles is reported and discussed. Since SWCNT, MWCNT and cellulose exhibit different surface chemistries (nature of chemical sites, size related reactivity, …), they drive the formation of nanoparticles with different characteristics. Moreover, intermediate materials Ni(OH) 2 /C and NiO/C have been also studied and the opportunity to obtain promising structures like NiO/ graphene nanocomposites by this method has been demonstrated.

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Hierarchical carbon nanotube/α-Ni(OH)2 nanosheet composite paper with enhanced electrochemical capacitance

Cited by 29 publications

References 11 publications

Electrodes from carbon nanotubes/NiO nanocomposites synthesized in modified Watts bath for supercapacitors

Electrodes from carbon nanotubes/NiO nanocomposites synthesized in modified Watts bath for supercapacitors

Ni(OH)2 and NiO Based Composites: Battery Type Electrode Materials for Hybrid Supercapacitor Devices

The Influence of Sacrificial Carbonaceous Supports on the Synthesis of Anhydrous NiF₂Nanoparticles

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Hierarchical carbon nanotube/α-Ni(OH)2 nanosheet composite paper with enhanced electrochemical capacitance

Cited by 29 publications

References 11 publications

Electrodes from carbon nanotubes/NiO nanocomposites synthesized in modified Watts bath for supercapacitors

Electrodes from carbon nanotubes/NiO nanocomposites synthesized in modified Watts bath for supercapacitors

Ni(OH)2 and NiO Based Composites: Battery Type Electrode Materials for Hybrid Supercapacitor Devices

The Influence of Sacrificial Carbonaceous Supports on the Synthesis of Anhydrous NiF2Nanoparticles

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The Influence of Sacrificial Carbonaceous Supports on the Synthesis of Anhydrous NiF₂Nanoparticles