Hybrids of NiCo 2 O 4 nanorods and nanobundles with graphene as promising electrode materials for supercapacitors

Wang, Zhuo; Zhang, Xin; Zhang, Zhongshen; Qiao, Nanli; Yang, Li; Hao, Zhengping

doi:10.1016/j.jcis.2015.08.067

Cited by 44 publications

(10 citation statements)

References 36 publications

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“…Among these transition metals oxides, the nickel oxides and their hydroxides or compounds have attracted much attention due to their huge actual capacitance (e.g. NiO -1829 F/g [21] , Ni(OH) 2 -366.9 m 2 /g [22] , NiCo 2 O 4 -1278 F/g [23] , Ni 3 V 2 O 8 -1181 F/g [24] , NiS -2.64 F cm 2 [25] ). In addition to the above materials, Ni 3 P 2 O 8 is an important inorganic phosphate with a two-dimensional layer open structure, which is benefit for improving effective specific surface area of materials.…”

Section: Introductionmentioning

confidence: 99%

Simple synthesis of novel phosphate electrode materials with unique microstructure and enhanced supercapacitive properties

Liu

Han

et al. 2016

Journal of Energy Chemistry

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Section: Introductionmentioning

confidence: 99%

Simple synthesis of novel phosphate electrode materials with unique microstructure and enhanced supercapacitive properties

Liu

Han

et al. 2016

Journal of Energy Chemistry

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“…The samples’ morphology was characterized using scanning electron microscopy (SEM), as shown in Figure 3 . SEM images for all of the as-obtained samples clearly show that the samples are composed of 3D nanobundles with different lengths [ 37 , 38 ]. The formation of metal oxides nanobundles can be explained as follows: firstly, the metal cations were adsorbed onto the carbon xerogel surface with the aid of urea as a precipitator agent.…”

Section: Resultsmentioning

confidence: 99%

“…The formation of metal oxides nanobundles can be explained as follows: firstly, the metal cations were adsorbed onto the carbon xerogel surface with the aid of urea as a precipitator agent. During the hydrothermal process, the metal hydroxides were formed in a one-step process and converted into spinel metal oxides nanobundles during the calcination treatment [ 37 ]. The nanobundle structure of the prepared samples is also confirmed with TEM analysis.…”

Section: Resultsmentioning

confidence: 99%

“…As it can be seen, a semicircle is observed at the high-frequency region due to charge transfer resistance on the electrode/electrolyte interface. Meanwhile, at low frequency, a purely capacitive behavior is obtained, and the combination between both the resistive and capacitive behavior is known as the Warburg region, which has a relation to the diffusive resistance [ 37 , 48 ]. The equivalent series resistance (ESR) of the electrode can be determined by the intersection of the semicircle with the real axis.…”

Section: Resultsmentioning

confidence: 99%

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Binary and Ternary 3D Nanobundles Metal Oxides Functionalized Carbon Xerogels as Electrocatalysts toward Oxygen Reduction Reaction

2020

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A series of carbon xerogels doped with cobalt, nickel, and iron have been prepared through the sol–gel method. The doped carbon xerogels were further functionalized with binary and ternary transition metal oxides containing Co, Ni, and Zn oxides by the hydrothermal method. A development in the mesopore volume is achieved for functionalized carbon xerogel doped with iron. However, in the functionalization of carbon xerogel with ternary metal oxides, a reduction in pore diameter and mesopore volume is found. In addition, all functionalized metal oxides/carbon are in the form of 3D nanobundles with different lengths and widths. The prepared samples have been tested as electrocatalysts for oxygen reduction reaction (ORR) in basic medium. All composites showed excellent oxygen reduction reaction activity; the low equivalent series resistance of the Zn–Ni–Co/Co–CX composite was especially remarkable, indicating high electronic conductivity. It has been established that the role of Zn in this type of metal oxides nanobundles-based ORR catalyst is not only positive, but its effect could be enhanced by the presence of Ni.

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“…3D graphene not only increased the conductivity of NiCo 2 O 4 , but can also offer effective buffering to accommodate the lithiation-induced stress which is beneficial to lithium storage and cycling stability [305]. The NiCo 2 O 4 –graphene is an attractive electrode material for supercapacitors [306–307]. NiCo 2 S 4 –graphene hybrids synthesised by a one-pot solvothermal strategy are used for ORR and ORE [308].…”

Section: Reviewmentioning

confidence: 99%

Synthesis of graphene–transition metal oxide hybrid nanoparticles and their application in various fields

Jana¹,

Scheer²,

Polarz³

2017

Beilstein J. Nanotechnol.

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Single layer graphite, known as graphene, is an important material because of its unique two-dimensional structure, high conductivity, excellent electron mobility and high surface area. To explore the more prospective properties of graphene, graphene hybrids have been synthesised, where graphene has been integrated with other important nanoparticles (NPs). These graphene–NP hybrid structures are particularly interesting because after hybridisation they not only display the individual properties of graphene and the NPs, but also they exhibit further synergistic properties. Reduced graphene oxide (rGO), a graphene-like material, can be easily prepared by reduction of graphene oxide (GO) and therefore offers the possibility to fabricate a large variety of graphene–transition metal oxide (TMO) NP hybrids. These hybrid materials are promising alternatives to reduce the drawbacks of using only TMO NPs in various applications, such as anode materials in lithium ion batteries (LIBs), sensors, photocatalysts, removal of organic pollutants, etc. Recent studies have shown that a single graphene sheet (GS) has extraordinary electronic transport properties. One possible route to connecting those properties for application in electronics would be to prepare graphene-wrapped TMO NPs. In this critical review, we discuss the development of graphene–TMO hybrids with the detailed account of their synthesis. In addition, attention is given to the wide range of applications. This review covers the details of graphene–TMO hybrid materials and ends with a summary where an outlook on future perspectives to improve the properties of the hybrid materials in view of applications are outlined.

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Hybrids of NiCo 2 O 4 nanorods and nanobundles with graphene as promising electrode materials for supercapacitors

Cited by 44 publications

References 36 publications

Simple synthesis of novel phosphate electrode materials with unique microstructure and enhanced supercapacitive properties

Simple synthesis of novel phosphate electrode materials with unique microstructure and enhanced supercapacitive properties

Binary and Ternary 3D Nanobundles Metal Oxides Functionalized Carbon Xerogels as Electrocatalysts toward Oxygen Reduction Reaction

Synthesis of graphene–transition metal oxide hybrid nanoparticles and their application in various fields

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