Coaxial NiO/Ni nanowire arrays for high performance pseudocapacitor applications

Hasan, Maksudul; Jamal, Mamun; Razeeb, Kafil M.

doi:10.1016/j.electacta.2011.11.039

Cited by 82 publications

(63 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Metal oxide-supported Pt electrocatalysts such as Pt/SnO x [51], Pt-MgO/C [52], Pt-CeO 2 /C [53,54], Pt-ZrO 2 /C [55], CNT/SnO 2 /Pt thin films [56], Pt-Mo/CNT@TiO 2 [57], and Pt-ATO (platinum-antimony tin oxide)/MWCNT [58] have been shown to improve electrocatalytic activity and stability for ethanol electrooxidation compared to pure Pt or Pt/C electrocatalysts. NiO is a very attractive material for various applications such as Li-ion battery anode [59], supercapacitors [14,60], and fuel cell electrodes [61,62]. In this chapter, we demonstrate a novel hybrid electrocatalyst synthesized using highly ordered conductive metal/metal oxide (Ni/NiO) nanowire arrays (NWA) as a support for porous Pt NP.…”

Section: Fuel Cellsmentioning

confidence: 99%

“…Since simple and low-cost fabrication methods are always desired, hence, we have adopted a convenient method for the fabrication of the electrode by a simple electrodeposition of Ni NWs using template and controlled conversion of the deposited Ni NWs into Ni/NiO core/shell structure by low-power oxygen plasma annealing within a few minutes. The coaxial Ni/NiO NW arrays demonstrated an excellent capacity retention as well as high capacitance, both are important properties for supercapacitor applications [14].…”

Section: à3mentioning

confidence: 99%

“…It is also environmentally friendly. Unfortunately, nickel oxide is an electrically poor conductive material (p-type semiconductor), and therefore, in order to improve the maximum utilization of NiO, the introduction of a conductive metal as a coaxial supporting structure is essential [14].…”

Section: à3mentioning

confidence: 99%

See 2 more Smart Citations

Electrochemically Fabricated Nanostructures in Energy Storage and Conversion Applications

Razeeb

Hasan

Jamal

et al. 2015

Handbook of Nanoelectrochemistry

Self Cite

View full text Add to dashboard Cite

In order to move away from the carbon-based energy technologies, electrochemical energy production and storage is under serious consideration as an alternative energy/power source. The future success of this global effort is under review, and researchers are looking forward to designing more sustainable and environmentally friendly electrochemical energy storage and conversion (EESC) systems. Electrochemical energy storage and conversion systems in the broadest sense have three variants: batteries, fuel cells, and electrochemical capacitors, also known as supercapacitors. The energy storage and conversion mechanisms in these three systems are different, but the energy -providing processes in these systems -all follow solid state and surface interface chemistry, taking place in active electrode materials and at the phase boundary of the electrode/electrolyte interface. Also, all three systems consist of two electrodes which are in contact with the electrolyte but separated by a membrane. Conventional materials used in these systems cannot meet the ever-increasing demand for energy. Thereby, designing efficient and miniaturized EESC devices that achieve high energy storage or delivery at high charge and discharge rates and with lifetimes capable of matching the specific requirements of applications is one of the major challenges facing today's research community.Thereby, this chapter will review some of the recent developments (2010)(2011)(2012)

show abstract

Section: Fuel Cellsmentioning

confidence: 99%

Section: à3mentioning

confidence: 99%

See 1 more Smart Citation

Electrochemically Fabricated Nanostructures in Energy Storage and Conversion Applications

Razeeb

Hasan

Jamal

et al. 2015

Handbook of Nanoelectrochemistry

Self Cite

View full text Add to dashboard Cite

show abstract

“…In particular, the possibility of tuning the properties of nanostructured NiO by a partial reduction process has opened up novel paths for widespread research activities in the nanoscale science. The partial reduction of TM oxides forms composites, which consist of TM nanoparticles embedded in a TM oxide matrix and find applications in various advanced fields such as sensor, supercapacitor, solar cell, microwave, battery, spintronics, solid oxide fuel cell, electrochromic, resistive random access memory, etc [2][3][4][5][6]. Although different synthesis methods such as chemical precipitation [7], electro-deposition [8], solid state [9], micro-emulsion [10], spray pyrolysis [11], sol-gel [12], hydrothermal [13], etc have been employed, the high-energy ball milling [14][15][16] has been proven as the simplest and inexpensive method for the synthesis of nanosized NiO powders with controlled magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

Mechanical activation on aluminothermic reduction and magnetic properties of NiO powders

Padhan

Sathish

Saravanan

et al. 2017

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

We report the mechanically activated aluminothermic reduction of NiO [NiO-Al(x wt.%) with x = 0, 20, 40] into NiO-Ni-Al 2 O 3 nanocomposites using high-energy planetary ball milling under dry milling and the resulting structural and magnetic properties. Structural studies reveal that both NiO and NiO-Al powders exhibit a face centered cubic structure with large crystal size reduction. However, the NiO-Al milled powders unveil the process of aluminothermic reaction kinetics, which changes from gradual reaction as a function of milling time for x = 20 powders to self-propagating combustion reaction for x = 40. This allows us to achieve a maximum NiO reduction of 40% and 90% for x = 20 and 40, respectively. The process of NiO reduction by Al is further confirmed through thermal studies. Pure NiO shows an antiferromagnetic (AFM) nature, which transforms into a ferromagnetic (FM) one with the moderate magnetization of about 1 emu g −1 with decreasing crystal size. The formation of FM Ni from AFM NiO matrix in milled NiO-Al powders could be precisely monitored by the change in the magnetization, which increases up to 4 emu g −1 and 28 emu g −1 for the gradual and combustion reactions, respectively. This results in a considerable exchange bias and its magnitude strongly depends on the relative fractions of NiO and Ni phases. Thermomagnetization data confirm the presence of mixed magnetic phases and the component of induced FM phase fades out due to the formation of Ni from the reduction of NiO. The changes in the structural and magnetic properties of milled NiO-Al powders are discussed on the basis of milling time-dependent mechanically activated reduction reaction of NiO into NiO-Ni-Al 2 O 3 nanocomposites. The process of mechanical activation on the aluminothermic reduction allows for a controlled reduction of NiO; thus, it is suitable for the applications in catalysis and the ore reduction process.

show abstract

“…Transition metal oxides such as nickel oxide [18][19], ruthenium oxide [20][21][22], manganese oxide [23][24][25], cobalt oxide [26][27][28], etc. have been studied by various groups to obtain high specific capacitance and high charge/discharge ability in electro-chemical capacitors.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Phase Pure NiO Nanoparticles via the Combustion Route using Different Organic Fuels for Electrochemical Capacitor Applications

Srikesh¹,

Nesaraj²

2015

Journal of Electrochemical Science and Technology

View full text Add to dashboard Cite

Transition metal oxide nanocrystalline materials are playing major role in energy storage application in this scenario. Nickel oxide is one of the best antiferromagnetic materials which is used as electrodes in energy storage devices such as, fuel cells, batteries, electrochemical capacitors, etc. In this research work, nickel oxide nanoparticles were synthesized by combustion route in presence of organic fuels such as, glycine, glucose and and urea. The prepared nickel oxide nanoparticles were calcined at 600 o C for 3 h to get phase pure materials. The calcined nanoparticles were preliminarily characterized by XRD, particle size analysis, SEM and EDAX. To prepare nickel oxide electrode materials for application in supercapacitors, the calcined NiO nanoparticles were mixed with di-methyl-acetamide and few drops of nafion solution for 12 to 16 h. The above slurry was coated in the graphite sheet and dried at 50 o C for 2 to 4 h in a hot air oven to remove organic solvent. The dried sample was subjected to electrochemical studies, such as cyclic voltammetry, AC impedance analysis and chrono-coulometry studies in KOH electrolyte medium. From the above studies, it was found that nickel oxide nanoparticles prepared by combustion synthesis using glucose as a fuel exhibited resulted in low particle diameter (42.23 nm). All the nickel oxide electrodes have shown better good capacitance values suitable for electrochemical capacitor applications.

show abstract

Coaxial NiO/Ni nanowire arrays for high performance pseudocapacitor applications

Cited by 82 publications

References 18 publications

Electrochemically Fabricated Nanostructures in Energy Storage and Conversion Applications

Electrochemically Fabricated Nanostructures in Energy Storage and Conversion Applications

Mechanical activation on aluminothermic reduction and magnetic properties of NiO powders

Synthesis and Characterization of Phase Pure NiO Nanoparticles via the Combustion Route using Different Organic Fuels for Electrochemical Capacitor Applications

Contact Info

Product

Resources

About