Anodically potentiostatic deposition of flaky nickel oxide nanostructures and their electrochemical performances

Wu, Mao‐Sung; Huang, Yuan; Jow, Jiin-Jiang; Yang, Wein-Duo; Hsieh, Ching-Yuan; Tsai, Huei-Mei

doi:10.1016/j.ijhydene.2008.04.012

Cited by 68 publications

(27 citation statements)

References 28 publications

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“…At the scan rate of 500 mV s −1 , HNC demonstrated significantly better performance (167 mF cm −2 , 70 times higher) than NiO‐TiO 2 nanotube arrays (2.3 mF cm −2 ) with similar thickness 36. The areal capacitance of HNC was also higher than other nickel‐based electrodes with thicker active material layer 15, 51–53. The specific capacitance decreased gradually with increasing scan rate (Figure 5c), which is due to decreasing utilization of active material caused by limited diffusion/migration of ions.…”

Section: Resultsmentioning

confidence: 94%

A One‐Step and Binder‐Free Method to Fabricate Hierarchical Nickel‐Based Supercapacitor Electrodes with Excellent Performance

Zhang

Xie

et al. 2013

Adv Funct Materials

147

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Research is currently being carried out in the search for alternative electrode materials to replace the expensive and toxic RuO2‐based electrode. As a typical example, nickel oxide or hydroxide has been widely studied but the results are far from satisfactory. Here, using a facile one‐step anodization method, a hierarchical nickel compound (HNC) film with an interconnecting 3D nanoflake structure is obtained, providing large electrochemically active surface area and interconnecting nanoscale pore channels for ion transport. The HNC electrode demonstrates significantly improved capacitance, 70 times higher than the reported NiO‐TiO2 nanotube array electrode with similar thickness. The charge/discharge kinetics are also superior, showing only a 24% capacitance reduction when the scan rate is increased by 50 times, as compared with the typical 70% capacitance reduction for pseudocapacitor electrodes under the same conditions. HNC exhibits an extraordinary excellent cycle life; capacitance increases to 115% after 4500 test cycles. Furthermore, because HNC is in intimate contact with the current collector, it is not necessary to use conducting agents or binders, which reduces the electrode weight and facilitates the electrode preparation process. The method is low cost, facile, scalable, additive free, and is promising for fabricating supercapacitor electrode with excellent performance.

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Section: Resultsmentioning

confidence: 94%

A One‐Step and Binder‐Free Method to Fabricate Hierarchical Nickel‐Based Supercapacitor Electrodes with Excellent Performance

Zhang

Xie

et al. 2013

Adv Funct Materials

147

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“…The nanoporous structure enhances the accessibility of KOH electrolyte and promotes reactive species transport within the electrode. The nanosized Ni(OH) 2 grains may shorten proton diffusion paths within the bulk of solid nickel hydroxide [5,31]. It is noted that the as-prepared Ni(OH) 2 is ␣ phase (Fig.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical fabrication of a porous nanostructured nickel hydroxide film electrode with superior pseudocapacitive performance

Kong

Wang

Shao

et al. 2011

Journal of Alloys and Compounds

115

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“…(1) NiO. Nickel oxide is considered an alternative electrode material for ES in alkaline electrolytes due to its easy synthesis, relatively high specific capacitance (theoretical specific capacitance of 3750 F g À1 ), [421][422][423][424] environment friendliness, and low cost. 425 The redox reaction of nickel oxide in a KOH electrolyte can be expressed as eqn (21): [426][427][428]74 NiO + OH…”

Section: Comentioning

confidence: 99%

A review of electrode materials for electrochemical supercapacitors

2012

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Anodically potentiostatic deposition of flaky nickel oxide nanostructures and their electrochemical performances

Cited by 68 publications

References 28 publications

A One‐Step and Binder‐Free Method to Fabricate Hierarchical Nickel‐Based Supercapacitor Electrodes with Excellent Performance

A One‐Step and Binder‐Free Method to Fabricate Hierarchical Nickel‐Based Supercapacitor Electrodes with Excellent Performance

Electrochemical fabrication of a porous nanostructured nickel hydroxide film electrode with superior pseudocapacitive performance

A review of electrode materials for electrochemical supercapacitors

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