Flower-like NiO structures: Controlled hydrothermal synthesis and electrochemical characteristic

Chai, Hui; Chen, Xuan; Jia, Dianzeng; Bao, Shu‐Juan; Zhou, Wanyong

doi:10.1016/j.materresbull.2012.08.033

Cited by 29 publications

(9 citation statements)

References 34 publications

(39 reference statements)

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“…Significant advances have been made in the development of NiO electrodes with mass loading of 10–30 mg cm −2 (Table 2). Flower‐like, hollow core–shell, ordered mesoporous, and multishelled structures were formed [ 105–112 ] and utilized for the fabrication of advanced electrodes with high gravimetric capacitance and enhanced cyclic stability. Binder‐free 3D NiO–graphene structures have been developed.…”

Section: Co3o4 Nio and Other Oxidesmentioning

confidence: 99%

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

Chen

Sahu

et al. 2020

Advanced Energy Materials

205

128

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Pseudocapacitive materials are used for supercapacitor applications due to their exceptionally high capacitance and low cost. Good capacitive performance of the pseudocapacitive materials at high active mass loadings is vital for the development of the next generation of supercapacitor devices. This review describes recent advances in materials and nanotechnologies, which allows the development of advanced pseudocapacitive devices with high active mass. An important breakthrough is the discovery of novel dispersing and capping agents for the colloidal processing of nanoparticles. Particularly important are novel co‐dispersants that exhibit enhanced adsorption on materials of different types, such as inorganic nanoparticles, carbon nanotubes, and graphene. Conceptually new strategies are designed to fabricate coated particles. Recent innovations pave the way for the development of multifunctional redox‐active dopants‐dispersants and dopants‐oxidants to manufacture conductive polymer composites. Among the most important advances in nanotechnology is the development of template methods and heterocoagulation techniques for composite manufacturing. The progress in the design of novel surface modification techniques and materials, discovery of advanced anchoring groups, and development of liquid–liquid extraction allows agglomerate‐free processing of nanomaterials and composites. This review describes fundamental aspects of novel technologies and their applications in the manufacturing of pseudocapacitive devices for energy storage.

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Section: Co3o4 Nio and Other Oxidesmentioning

confidence: 99%

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

Chen

Sahu

et al. 2020

Advanced Energy Materials

205

128

View full text Add to dashboard Cite

show abstract

“…22,28 Thus, in this study, NiO nanosheets and nanowires were prepared by hydrothermal method under different conditions. Morphology of the hydrothermal nanowires before calcination characterized by SEM and TEM images are shown in Fig.…”

Section: Materials Characteristicsmentioning

confidence: 99%

A comparative study on the electrochemical properties of nanoporous nickel oxide nanowires and nanosheets prepared by a hydrothermal method

et al. 2018

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Metal oxide nanostructures have been extensively used in electrochemical devices due to their advantages, including high active surface area and chemical stability. However, the electrochemical properties of metal oxides are strongly dependent on their structural characteristics. We performed a comparative study on the electrochemical performance of nanoporous nickel oxide (NiO) nanosheets and nanowires. The advanced nanoporous NiO nanomaterials were synthesized by a facile hydrothermal method followed by thermal calcination. The synthesized nanomaterials, as characterized by scanning electron microscopy, transmission electron microscopy, selected area electron diffraction, X-ray diffraction, and nitrogen adsorption/desorption isotherms, demonstrated the nanoporosity and high crystallinity of the NiO nanosheets and nanowires. Cyclic voltammetry measurement was performed using a three-electrode system to evaluate the electrochemical properties of the synthesized materials. Results showed that the nanoporous NiO nanosheets possessed a higher current density than that of the nanowires by approximately ten times. Moreover, the nanoporous NiO nanosheets showed exceptionally high stability of almost 100%, after three cycles in strong alkaline environments, thereby suggesting possible application in electrochemical devices.

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“…Nickel oxide (NiO), as an important functional material, has received an intensive attention recently due to their attractive applications in diverse fields, such as gas sensors (Lee et al 2007;Mattei et al 2007), magnetic materials (Parada and Morán 2006;He et al 2008;Kim et al 2010), catalysts (Park et al 2005), electrochromic films (Tenent et al 2010) and electrode materials (Wang et al 2006;Zheng et al 2009;Gillaspie et al 2010;Chai et al 2012). NiO has been extensively studied as a pseudocapacitor electrode material owing to its large surface area, high pseudocapacitance behaviour, and low cost with a good possibility of enhancing its performance by improving the preparative methods (Prasad and Miura 2004;Zheng and Zhang 2007;Meher et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Effect of calcination methods on electrochemical performance of NiO used as electrode materials for supercapacitor

Wang

Qin

2014

Bull Mater Sci

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Ni(OH) 2 precursors were prepared via the precipitation transformation method, which was originated from Na 2 C 2 O 4 , NiSO 4 ⋅6H 2 O and urea. NiO samples were successfully obtained by calcining Ni(OH) 2 precursor with different calcination methods. Some were calcination in a tube furnace under the nitrogen flow and others were calcination in a muffle furnace. The products were well-characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The influence of calcination methods on electrochemical performance of NiO samples were investigated. Moreover, the possible reason was proposed. The charge storage mechanism of NiO positive electrode in aqueous electrolyte was discussed. The electrochemical test showed that the as-prepared NiO prepared in a tube furnace can exhibit a good pseudocapacitance behaviour due to the higher utilization of active material.

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Flower-like NiO structures: Controlled hydrothermal synthesis and electrochemical characteristic

Cited by 29 publications

References 34 publications

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

A comparative study on the electrochemical properties of nanoporous nickel oxide nanowires and nanosheets prepared by a hydrothermal method

Effect of calcination methods on electrochemical performance of NiO used as electrode materials for supercapacitor

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