Three-dimensional nickel hydroxide/graphene composite hydrogels and their transformation to NiO/graphene composites for energy storage

Meng, Xiaoqian; Zhu, Junwu; Bi, Hongyan; Fu, Yongsheng; Han, Qiaofeng; Wang, Xin

doi:10.1039/c5ta05008a

Cited by 30 publications

(15 citation statements)

References 45 publications

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“…NPs are uniformly dispersed on the graphene sheets, with no noticeable agglomeration. 28 In addition, the mean diameters of Ni and NiO nanoparticles are 8.8 nm and 23.0 nm, respectively, which are both less than the skin depth. 23 The d-spacing values were calculated from the HRTEM image and SAED pattern.…”

Section: Fig 3(a and D) Reveal That The Nio And Nimentioning

confidence: 98%

Preparation and evaluation of the microwave absorption properties of template-free graphene foam-supported Ni nanoparticles

Xiong

Liu

et al. 2017

RSC Adv.

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Section: Fig 3(a and D) Reveal That The Nio And Nimentioning

confidence: 98%

Preparation and evaluation of the microwave absorption properties of template-free graphene foam-supported Ni nanoparticles

Xiong

Liu

et al. 2017

RSC Adv.

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“…Figure compares the phase structure of as‐prepared Ni(OH) 2 /RGO, pristine GO, pure Ni(OH) 2 , and RGO. As seen in Figure , GO exhibits a typical XRD peak at around 10.4°, which originates from hydroxyl, epoxy, and carboxyl groups . The corresponding interlayer distance calculated from the Bragg equation is about 0.88 nm.…”

Section: Resultsmentioning

confidence: 91%

Two‐Step Deposition/Reduction Synthesis of Porous Lamellar β‐Ni(OH)₂/Reduced Graphene Oxide Composites with Large Capacitance for Supercapacitors

et al. 2017

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Ni(OH)2/RGO composite are synthesized though a facile two‐step method, in which the Ni(OH)2 deposition and GO reduction processes take place separately. The present methods promote the deposition of more Ni(OH)2 and full utilization of RGO, owing to the high reactivity, good solubility, and dispersity of GO. Moreover, the utilization of additives is avoided. The Ni(OH)2/RGO synthesized by using the two‐step method shows a uniform porous lamellar structure with a high specific surface area. When employed as a supercapacitor electrode material, the Ni(OH)2/RGO composite exhibits a high specific capacitance of 2877 F g−1, long cycle life with capacitance retention of 86.5 % after 4000 cycles, and high energy density of 120.9 Wh kg−1 at a power density of 0.14 kW kg−1. The Ni(OH)2/RGO composite prepared by using the two‐step method in this work shows 11.8–85.1 % higher specific capacitances than composites fabricated by using the other method. The excellent performances and the facile synthesis method highlight the promising potential of the present Ni(OH)2/RGO composite in supercapacitor applications.

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“…Meng et al. proposed that 3D NiO nanostructures not only prevented excessive restacking of graphene sheets, but also offered free channels for ion diffusion . In particular, graphene‐based 3D NiO nanostructures exhibit high surface areas, high conductivity, excellent rate capability, and cycling stability.…”

Section: Batteriesmentioning

confidence: 99%

“…Meng et al proposed that 3D NiO nanostructures not only prevented excessive restacking of graphene sheets, but also offered free channels for ion diffusion. [92] In particular,g raphenebased 3D NiO nanostructures exhibit high surfacea reas, high conductivity,e xcellent rate capability,a nd cycling stability. Their electrode based on NiO/graphenec omposite delivered a discharge capacity of 1349 mA h À1 g À1 and ac hargec apacity of 992 mA h À1 g À1 in the first cycle with ac oulombic efficiency of about 73.5 %.…”

Section: Three-dimensional Nio Nanostructuresmentioning

confidence: 99%

Nickel Oxide/Graphene Composites: Synthesis and Applications

Liu

Gao

et al. 2018

Chemistry A European J

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Nickel oxide (NiO) has emerged as one of the most promising transition-metal oxides (TMOs) for electrochemical capacitors, batteries, catalysis, and electrochromic films, owing to its cost-effectiveness, abundance, and well-defined electrochemical properties. Recent studies have identified that mixing NiO with graphene or graphene derivatives results in novel composites with synergistic effects and superior electrochemical performance. This review summarizes the latest advances in composites of NiO with graphene or graphene derivatives. The synthetic strategies, morphologies, and electrochemical performance of these composites are introduced, as well as their electrochemical applications in supercapacitors, batteries, sensors, catalysis, and so forth. Finally, tentative conclusions and assessments regarding the opportunities and challenges for the future development of these composites and other TMOs/graphene or graphene-derived composites are presented.

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Three-dimensional nickel hydroxide/graphene composite hydrogels and their transformation to NiO/graphene composites for energy storage

Abstract: Ni(OH)2/graphene composite hydrogels are successfully prepared with the Ni(OH)2 nanoplates uniformly grown on graphene sheets in situ.

Cited by 30 publications

References 45 publications

Preparation and evaluation of the microwave absorption properties of template-free graphene foam-supported Ni nanoparticles

Preparation and evaluation of the microwave absorption properties of template-free graphene foam-supported Ni nanoparticles

Two‐Step Deposition/Reduction Synthesis of Porous Lamellar β‐Ni(OH)₂/Reduced Graphene Oxide Composites with Large Capacitance for Supercapacitors

Nickel Oxide/Graphene Composites: Synthesis and Applications

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Three-dimensional nickel hydroxide/graphene composite hydrogels and their transformation to NiO/graphene composites for energy storage

Abstract: Ni(OH)2/graphene composite hydrogels are successfully prepared with the Ni(OH)2 nanoplates uniformly grown on graphene sheets in situ.

Cited by 30 publications

References 45 publications

Preparation and evaluation of the microwave absorption properties of template-free graphene foam-supported Ni nanoparticles

Preparation and evaluation of the microwave absorption properties of template-free graphene foam-supported Ni nanoparticles

Two‐Step Deposition/Reduction Synthesis of Porous Lamellar β‐Ni(OH)2/Reduced Graphene Oxide Composites with Large Capacitance for Supercapacitors

Nickel Oxide/Graphene Composites: Synthesis and Applications

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Two‐Step Deposition/Reduction Synthesis of Porous Lamellar β‐Ni(OH)₂/Reduced Graphene Oxide Composites with Large Capacitance for Supercapacitors