Porous hexagonal NiCo2O4 nanoplates as electrode materials for supercapacitors

Pu, Jun; Wang, Jie; Jin, Xiaoquan; Cui, Fangling; Sheng, Enhong; Wang, Zhenghua

doi:10.1016/j.electacta.2013.05.092

Cited by 204 publications

(115 citation statements)

References 44 publications

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“…1) and previously reported data [8,23,26]. There appears to be a small amount of contamination from Ni(OH) 2 and Co 3 O 4 in the templated materials.…”

Section: Resultssupporting

confidence: 61%

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Polymer templated nickel cobaltate for energy storage

Albohani

Minakshi

Laird

2017

Renew. Energy Environ. Sustain.

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Abstract. In order to take advantage of the increasing sophistication of technology for harnessing renewable energy resources, serious attention must be paid to how to store and re-access this energy. Electrochemical storage, in the guise of batteries, supercapacitors and pseudocapacitors, has attracted much attention as a viable option for enhanced energy storage applications. But in order for these technologies to be implemented successfully we need to find materials that perform better and are relatively easy to synthesise. Bimetallic transition metal oxides are materials that are readily synthesised and may be multifunctional, i.e. have a role at the electrochemical atomic level as well as the device level. In order for these materials to work efficiently in new generation systems based on sodium and lithium they also need to be mesoporous. This can be achieved by trying to find synthetic techniques that produce specific, highly regulated nanostructures or by adding a 'templating' agent during the bulk synthesis step. We have investigated the simple hydrothermal preparation of a number of nickel cobaltate (NiCo 2 O 4 ) materials using polymer templates, eggshell membrane (ESM) and poly methyl methacrylate (PMMA), as potential electrode materials for supercapacitors. The ESM was expected to act as a fibrous, random polymeric template while the PMMA should produce a much more ordered material. Electrochemical testing showed that the different templates have led to changes in material morphology and these have resulted in a difference in electrochemical properties. Templated materials increased specific capacitance compared to non-templated and the choice of template could influence the capacitance by as much as 30%.

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“…1) and previously reported data [8,23,26]. There appears to be a small amount of contamination from Ni(OH) 2 and Co 3 O 4 in the templated materials.…”

Section: Resultssupporting

confidence: 61%

“…Furthermore, the material possesses rich redox chemistry, electronic conductivity and electrochemical activity when compared to the corresponding simple metal oxides, NiO and Co 3 O 4 [15,16,23] …”

Section: Introductionmentioning

confidence: 99%

Polymer templated nickel cobaltate for energy storage

Albohani

Minakshi

Laird

2017

Renew. Energy Environ. Sustain.

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“…The specific capacitance calculated for the samples are presented in Figure 8 (d), the higher capacitance of 519 Fg -1 is delivered by as prepared sample compared to calcined samples. This is not only attributed to decrease in particle size of as prepared Bi 2 MoO 6 , the nanoplate-like structure of the material, which enhances the ionic transport and diffusion of electrolytes to improve the active sites [36,37].…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

“…When comparing the morphology of three different crystal phases of bismuth molybdates, nano plate-like structure of the as prepared Bi 2 MoO 6 particles are more suitable for charge storage by the increase in active sites of the material. It is believed that nano plate-like structures could improve electrochemical performance due to the increase in surface area and active sites of the electrode material and a decrease in diffusion distance of electrolyte [36,37]. The N 2 adsorption-desorption isotherms, pore size distributions (BJH-plot) of as prepared Bi 2 MoO 6 nanoplates is shown in Figure 7.…”

Section: Morphological Analysismentioning

confidence: 99%

Synthesis, crystal structure and pseudocapacitor electrode properties of γ-Bi2MoO6 nanoplates

Senthilkumar

Selvan

Vasylechko

et al. 2014

Solid State Sciences

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. is analyzed by cyclic voltammetry and galvanostatic charge-discharge techniques. The effect of Na based aqueous electrolytes on capacitance of the Aurvillius type structured Bi 2 MoO 6 is investigated. As prepared γ-Bi 2 MoO 6 nanoplates provide the high specific capacitance (519 Fg -1 ) compared with the high-temperature monoclinic phase γ(H) Bi 2 MoO 6 in 1 M NaOH electrolyte. The obtained high specific capacitance of as prepared Bi 2 MoO 6 could be attributed to the decrease in particle size, increase in active sites, and nano plate-like structure of as prepared γ-Bi 2 MoO 6 .

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“…Deng et al (2014) have synthesized NiCo 2 O 4 nanowires on carbon fiber paper via solvothermal method with specific capacitance, 690 F/g at a current density of 16 A/g. Pu et al (2013) have synthesized NiCo 2 O 4 nanoplates via hydrothermal method shows specific capacitance 294 F/g at current density of 1 A/g. The NCO-200, reported here shows supercapacitive behavior which is very much comparable to the above reported values and has a potential to be used as a supercapacitor electrode for next generation energy storage devices.…”

Section: Supercapacitive Studymentioning

confidence: 99%