Electrodeposited nickel hydroxide on nickel foam with ultrahigh capacitance

Yang, Guangwu; Xu, Cailing; Li, Hu‐Lin

doi:10.1039/b815647f

Cited by 551 publications

(224 citation statements)

References 19 publications

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“…The areal capacitance of the ANF electrode reached 2.04 F cm À2 at the current density of 8 mA cm À2 (Figure 3d), which is more than 10 times that of the value obtained for the NF electrode (0.20 F cm À2 ). This present areal capacitance obtained at such a high discharge current density is also considerably higher than that of recently reported NF-based electrodes, such as Ni(OH) 2 @NF (1.6 F cm À2 at 2 mA cm À2 ), 35 NiCo 2 O 4 @NF (1.5 F cm À2 at 5 mAcm À2 ), 36 CoMoO 4 @NF (1.26 F cm À2 at 4 mA cm À2 ), 37 CoO@NF (1.23 F cm À2 at 1 mA cm À2 ) 23 and MnO 2 @NF (0.25 F cm À2 at 1.03 mA cm À2 ). 38 Moreover, the ANF electrode exhibits an excellent rate capability with more than 55% retention of the initial capacitance as the current density increases from 8 to 20 mA cm À2 .…”

Section: Resultsmentioning

confidence: 80%

Scalable self-growth of Ni@NiO core-shell electrode with ultrahigh capacitance and super-long cyclic stability for supercapacitors

et al. 2014

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Three-dimensional (3D) electrodes have been demonstrated to be promising candidates for high-performance supercapacitors because of their unique architectures and outstanding electrochemical properties. However, the fabrication process for current 3D electrodes is not scalable. Herein, a novel and cost-effective activation process has been developed to macroscopically produce 3D porous Ni@NiO core-shell electrodes with enhanced electrochemical properties. The porous Ni@NiO core-shell electrode obtained by activated commercial Ni foam (NF) in a 3 M HCl solution yields an ultrahigh areal capacitance of 2.0 F cm À2 at a high current density of 8 mA cm À2 , which is substantially higher than that of most reported 3D NF-based electrodes. Moreover, the activated NF (ANF) electrode exhibited super-long cycling stability. Owing to the increased accessible surface area and continual formation of electrochemically active NiO during cycling, the areal capacitance of the ANF electrode did not exhibit any decay and instead increased from 0.47 to 1.27 F cm À2 after 100 000 cycles at 100 mV s À1 . This is the best cycling stability achieved by a 3D NF-based electrode. Additionally, a high-performance asymmetrical supercapacitor (ASC) device based on the as-prepared ANF cathode and a reduced graphene oxide (RGO) anode was also prepared. The ANF//RGO-ASC device was able to deliver a maximum energy density of 1.06 mWh cm À3 and a maximum power density of 0.42 W cm À3 .

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Section: Resultsmentioning

confidence: 80%

Scalable self-growth of Ni@NiO core-shell electrode with ultrahigh capacitance and super-long cyclic stability for supercapacitors

et al. 2014

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“…The nickel foam reduces the diffusion resistance of the redox electrolyte and improves the facility of ion transportation [23,24]. Prior to synthesis, the nickel foam substrates was cleaned with acetone and a 3 M HCl solution for 10 min to remove the surface oxide layer.…”

Section: Preparation Of Working Electrode On Nickel Foam Substratementioning

confidence: 99%

One-Pot Hydrothermal Synthesis of Novel Cu-MnS with PVP Cabbage-Like Nanostructures for High-Performance Supercapacitors

et al. 2018

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This paper reports the facile synthesis of a novel architecture of Cu-MnS with PVP, where the high theoretical capacitance of MnS, low-cost, and high electrical conductivity of Cu, as well as appreciable surface area with high thermal and mechanical conductivity of PVP, as a single entity to fabricate a high-performance electrode for supercapacitor. Benefiting from their unique structures, the Cu-MnS with 2PVP electrode materials show a high specific capacitance of 833.58 F g −1 at 1 A g −1 , reversibility for the charge/discharge process, which are much higher than that of the MnS-7 h, Cu-MnS, and Cu-MnS with 1 and 3PVP. The presence of an appropriate amount of PVP in Cu-MnS is favorable for improving the electrochemical performance of the electrode and the existence of Cu was inclined to enhance the electrical conductivity. The Cu-MnS with 2PVP electrode is a good reference for researchers to design and fabricate new electrode materials with enhanced capacitive performance.

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“…In addition, the method of fabrication must be scalable to allow for large amounts of total stored energy. 6,7 There have been many preliminary attempts to create such a network using foams, 8 nanocolumns, 9 nanowires, 10 nanoakes, 11 and lithographically dened microstructures. 12 Nonetheless, these designs have not been able to meet the requirements of next generation electrodes mentioned above.…”

Section: Introductionmentioning

confidence: 99%

Microstructural tunability of co-continuous bijel-derived electrodes to provide high energy and power densities

2016

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Electrodeposited nickel hydroxide on nickel foam with ultrahigh capacitance

Abstract: Electrodeposited Ni(OH)(2) on nickel foam with porous and 3D nanostructures has ultrahigh capacitance in the potential range -0.05-0.45 V, and a maximum specific capacitance as high as 3152 F g(-1) can be achieved in 3% KOH solution at a charge/discharge current density of 4 A g(-1).

Cited by 551 publications

References 19 publications

Scalable self-growth of Ni@NiO core-shell electrode with ultrahigh capacitance and super-long cyclic stability for supercapacitors

Scalable self-growth of Ni@NiO core-shell electrode with ultrahigh capacitance and super-long cyclic stability for supercapacitors

One-Pot Hydrothermal Synthesis of Novel Cu-MnS with PVP Cabbage-Like Nanostructures for High-Performance Supercapacitors

Microstructural tunability of co-continuous bijel-derived electrodes to provide high energy and power densities

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