Fabrication and electrochemical performances of hierarchical porous Ni(OH)2 nanoflakes anchored on graphene sheets

Yan, Jun; Sun, Wei; Wei, Tong; Zhang, Qiang; Fan, Zhuangjun; Wei, Fei

doi:10.1039/c2jm30221g

Cited by 269 publications

(154 citation statements)

References 49 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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“…14-0117), indicating Ni(OH) 2 nanocrystals grown on graphene with either Na 2 CO 3 or NaOH were well crystallized. 23,26 Moreover, compared to the standard card of -Ni(OH) 2 , an additional broad peak of graphene sheets around 2 of 24 was detected, which is considerably weaker than other peaks, suggesting the short-range ordering and less stacking for graphene sheets in the resulting composites. 8,34,41 To investigate the e®ect of HOGSs on the formation and morphology of the¯nal products, pure Ni(OH) 2 were prepared without HOGSs.…”

Section: Resultsmentioning

confidence: 99%

“…As one of the most important functional materials, Ni(OH) 2 has been widely studied. [19][20][21][22][23][24][25][26][27][28] An important report by Dai et al 29 presented a twostep approach for controlling the morphology of nanocrystals by tuning the surface chemistry of graphene substrates. As a result, well-de¯ned Ni(OH) 2 nanoplates on low-oxidation graphene sheets were accordingly obtained through the diffusion and recrystallization of the Ni(OH) 2 nanoparticles during the second step.…”

Section: Introductionmentioning

confidence: 99%

Chiseled Nickel Hydroxide Nanoplates Growth on Graphene Sheets for Lithium Ion Batteries

Tian

Wei

Zhuang

et al. 2013

NANO

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The morphologies and structures of Ni(OH) 2 -graphene hybrid materials were tailored by using di®erent mineralizers in this work. It was revealed that the synergic e®ects of the highly oxidized graphene sheets and the mineralizers played a crucial role in controlling the morphology and structure of the nanocomposites, and Na 2 CO 3 is a very e®ective mineralizer for growing chiseled 2D nanoplates of Ni(OH) 2 on graphene sheets. When produced with NaOH, fragmental Ni(OH) 2 crystals with irregular shapes erratically decorated on graphene sheets. In contrast, chiseled Ni (OH) 2 hexagonal nanoplates grown on graphene sheets were obtained when Na 2 CO 3 was used as the mineralizer. These unique 2D-2D nanoarchitectures with higher contact area between the nanocrystals and graphene substrate can increase the interfacial interaction and then e±ciently improve the structural stability of the composite material, thus exhibiting an enhanced Li storage capacity and excellent cycling performance of 562 mAh g À1 after the 36th cycle.

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“…Porous graphene hybrids can also be produced by thermally treating a mixture of graphene and porous components [48][49][50][51][52][53][54][55]. Rui et al [48] produced a V 2 O 5 /rGO composite by thermal pyrolysis of a hybrid of vanadium oxide (VO) and rGO at the temperature of 350°C for 30 min under a heating rate of 10°C/min in air.…”

Section: Template-free Approachmentioning

confidence: 99%

Porous Graphene Materials for Energy Storage and Conversion Applications

Wasalathilake¹,

Ayoko²,

Chen³

2016

Recent Advances in Graphene Research

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Porous graphene materials possess a unique structure with interconnected networks, high surface area, and high pore volume. Because of the combination of its remarkable architecture and intrinsic properties, such as high mechanical strength, excellent electrical conductivity, and good thermal stability, porous graphene has attracted tremendous attention in many fields, such as nanocomposites, lithium batteries, supercapacitors, and dye-sensitized solar cells. This chapter reviews synthesis methods, properties, and several key applications of porous graphene materials.

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Fabrication and electrochemical performances of hierarchical porous Ni(OH)2 nanoflakes anchored on graphene sheets

Cited by 269 publications

References 49 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

Chiseled Nickel Hydroxide Nanoplates Growth on Graphene Sheets for Lithium Ion Batteries

Porous Graphene Materials for Energy Storage and Conversion Applications

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