One-pot hydrothermal synthesis of reduced graphene oxide/Ni(OH)2 films on nickel foam for high performance supercapacitors

Min, Shudi; Zhao, Chongjun; Chen, Guorong; Qian, Xiuzhen

doi:10.1016/j.electacta.2013.10.140

Cited by 191 publications

(113 citation statements)

References 60 publications

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“…In this regard, a considerable efforts have been focused on preparation of small size, porous, thin, hollow spheres materials with exposure of sufficient active sites and small diffusion length for enhancing electrochemical performance [11,12]. Ni(OH) 2 has been identified as an interesting transition metal hydroxides materials due to its easy production, low cost and great theoretical capacitance [13,14]. Thus, the preparation of the nanoscale Ni(OH) 2 for energy storage applications has attracted many attentions.…”

Section: Introductionmentioning

confidence: 99%

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A facile hydrothermal reflux synthesis of Ni(OH)2/GF electrode for supercapacitor application

et al. 2016

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Ni(OH) 2 /graphene foam (GF) electrode was synthesized for electrochemical application by a facile hydrothermal reflux technique. The results obtained from the scanning electron microscopy showed that the Ni(OH) 2 spheres successfully coated the entire surface area of the GF. Specific capacitance of 2420 F g -1 at a current density of 1 A g -1 was obtained for Ni(OH) 2 /GF composite electrode, as well as a capacitance retention of ~93% after 1000 charge-discharge cycles, demonstrating excellent cycle stability in 6.0 M KOH electrolyte. These results suggest that the composite could be a potential active material for high performance electrochemical applications.

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Section: Introductionmentioning

confidence: 99%

“…For example, graphene is one of the commonly used material as substrate for composites, mostly due to the atom thick two-dimensional structure, high theoretical specific surface area of 2630 m 2 g -1 , high conductivity and good mechanical properties [13,14].…”

Section: Introductionmentioning

confidence: 99%

A facile hydrothermal reflux synthesis of Ni(OH)2/GF electrode for supercapacitor application

et al. 2016

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“…[43] Figure 3 (b) shows the CV curves of ZnO/GNS composite electrode at the different scan rates from 5 mVs -1 to 50 mVs -1 in 1 M KOH electrolyte. Furthermore, with increasing potential scan rates, the anodic peaks shift towards positive potential and the cathodic peaks shift towards negative potential, respectively, which may be attributed to the resistance of the electrode, [44] and the total characteristic CV shapes almost do not change, displaying good charge-discharge reversibility for ZnO/GNS. Worth the whistle, even at a high scan rate of 50 mVs -1 , the redox peaks are also observed, revealing that the resulting composite active materials are beneficial to fast redox reaction.…”

Section: Resultsmentioning

confidence: 96%

One-pot electrodeposition synthesis of ZnO/graphene composite and its use as binder-free electrode for supercapacitor

Zhang

Ren

Han

et al. 2015

Ceramics International

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“…R s is the bulk Ohmic resistance of the system that includes the solid electrolyte and the internal resistance of the electrode. [52,53] From the Nyquist plots and the equivalent circuit, the optimal Ni(OH) 2 nanoplates/NG composite has low charge transfer resistance R s % 0.5 W and bulk resistance R ct % 1.43 W. The bare NG has low R s % 0.36 W and R ct % 0.98 W. The resistances of the composites are reduced by the NG that provides a highly conductive network and the structure that prevents the staking of nanoplates. With the increasing Ni(OH) 2 content, the resistances of the composites all increase (Table 1).…”

mentioning

confidence: 97%

Flexible Asymmetric Supercapacitors Based on Nitrogen‐Doped Graphene Hydrogels with Embedded Nickel Hydroxide Nanoplates

Xie

Tang

et al. 2016

ChemSusChem

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To push the energy density limit of supercapacitors (SCs), new electrode materials with hierarchical nano-micron pore architectures are strongly desired. Graphene hydrogels that consist of 3 D porous frameworks have received particular attention but their capacitance is limited by electrical double layer capacitance. In this work, we report the rational design and fabrication of a composite hydrogel of N-doped graphene (NG) that contains embedded Ni(OH) nanoplates that is cut conveniently into films to serve as positive electrodes for flexible asymmetric solid-state SCs with NG hydrogel films as negative electrodes. The use of high-power ultrasound leads to hierarchically porous micron-scale sheets that consist of a highly interconnected 3 D NG network in which Ni(OH) nanoplates are well dispersed, which avoids the stacking of NG, Ni(OH) , and their composites. The optimal SC device benefits from the compositional features and 3 D electrode architecture and has a high specific areal capacitance of 255 mF cm at 1.0 mA cm and a very stable, high output cell voltage of 1.45 V, which leads to an energy density of 80 μW h cm even at a high power of 944 μW cm , considerably higher than that reported for similar devices. The devices exhibit a high rate capability and only 8 % capacitance loss over 10 000 charging cycles as well as excellent flexibility with no clear performance degradation under strong bending.

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One-pot hydrothermal synthesis of reduced graphene oxide/Ni(OH)2 films on nickel foam for high performance supercapacitors

Cited by 191 publications

References 60 publications

A facile hydrothermal reflux synthesis of Ni(OH)2/GF electrode for supercapacitor application

A facile hydrothermal reflux synthesis of Ni(OH)2/GF electrode for supercapacitor application

One-pot electrodeposition synthesis of ZnO/graphene composite and its use as binder-free electrode for supercapacitor

Flexible Asymmetric Supercapacitors Based on Nitrogen‐Doped Graphene Hydrogels with Embedded Nickel Hydroxide Nanoplates

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