Preparation and electrochemistry of NiO/SiNW nanocomposite electrodes for electrochemical capacitors

Tao, Bairui; Zhang, Jian; Miao, Fengjuan; Hui, Shichao; Wan, Lijuan

doi:10.1016/j.electacta.2010.04.057

Cited by 57 publications

(28 citation statements)

References 29 publications

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“…Probably due to the low intrinsic double layer Electrochemistry, 81(10), 777782 (2013) capacitance of silicon and to the use of poorly doped silicon, most of the authors have chosen not to use directly SiNWs as electrode but rather to use them as 1D substrates to grow other electrode materials on their surface: SiC, 8 gold 11 or NiO. 14,15 Moreover, the data on pristine silicon are only reported for devices and not for single electrode measurement in a standard 3 electrode cell. 5,10,11 The only indication found in the literature about the investigation of SiNWs electrode mentioned that they are anodized at potentials above +0.4 V vs. Ag/AgCl in 1 M KCl aqueous electrolyte.…”

Section: ¹2mentioning

confidence: 99%

“…13 Silicon nanostructures, mostly silicon nanowires (SiNWs) have been used as substrates to deposit different electroactive materials such as NiO. 14,15 In such case, the goal is to take advantage of the 1D nanostructure provided by SiNWs to provide a high surface expanding factor. EDLC electrodes based on SiNWs have also been characterized when coated with silicon carbide (SiC) 8 or gold.…”

Section: Introductionmentioning

confidence: 99%

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Highly N-doped Silicon Nanowires as a Possible Alternative to Carbon for On-chip Electrochemical Capacitors

et al. 2013

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Highly n-doped silicon nanowires (SiNWs) have been grown by a chemical vapor deposition process and have been investigated as possible electrodes for electrochemical capacitors (ECs) micro-devices. Their performances have been compared to existing literature on the field, which shows the use of SiNWs fabricated via different techniques, SiC coated SiNWs and porous silicon layers. The double layer capacitance of n-doped silicon wafer is ≈6 µF cm −2 in standard organic electrolyte, and this value can be increased by nanostructuration of SiNWs up to 440 µF cm −2 by tuning deposition parameters. Similar values are found in the literature. Symmetrical microdevices based on two identical SiNWs electrodes can be operated in organic based electrolytes within a 1.2 V voltage window. The devices show excellent cycling efficiency over more than 2000 cycles, with capacitance value of 51 µF cm −2 and an energy density of 10 nWh cm −2 (37 µJ cm). The increase of specific surface area by different techniques may drastically boost these values in the near future.

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Section: ¹2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly N-doped Silicon Nanowires as a Possible Alternative to Carbon for On-chip Electrochemical Capacitors

et al. 2013

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“…This redox couple is associated with the pseudocapacitive behavior of the NiO component in Ni/NiO NW arrays. It originates from the surface Faradaic oxidation and reduction reactions (NiO + OH À $ NiOOH + e À ), where the anodic peak is due to the oxidation of NiO to NiOOH and the cathodic peak is for the reverse process [10][11][12]. After increasing the annealing time to 120 s, the peak current intensities of the corresponding redox reactions are increased and the peak potentials shift to higher values at 0.41 and 0.28 V, respectively, as can be seen in Fig.…”

Section: Electrochemical Characterization Of the Electrodesmentioning

confidence: 99%

“…Specifically, one-dimensional (1D) nanostructured materials, e.g., nanotubes (NTs) or nanowires (NWs), fabricated directly on to a substrate may eliminate the use of ancillary materials and increase the active surface area as well as the energy capacity of the electrodes. In recent years, there has been extensive research in developing alternative pseudocapacitor electrode materials, such as cobalt oxide [6], manganese oxide [7,8], nickel hydroxide [9] and nickel oxide [10][11][12][13], either as porous and/or one-dimensional (1D) nanostructures. Due to its low cost, high specific capacitance, and good capacity retention, NiO is one of the most promising materials [4].…”

Section: à3mentioning

confidence: 99%

Electrochemically Fabricated Nanostructures in Energy Storage and Conversion Applications

Razeeb

Hasan

Jamal

et al. 2015

Handbook of Nanoelectrochemistry

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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)

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“…9−12 The fabrication and understanding of the properties of nanosize NiO play a key role in materials science, physics, and other research areas. Nanosized NiO can be used in rechargeable battery cathodes, 13,14 electrochemical capacitors, 15,16 catalysis, 17 gas sensors, 18 biomedical applications, 19 and magnetic materials. The properties of such nanomaterials are related to their chemical stoichiometry, defect distribution, size, and morphology, which strongly depend on the preparation conditions.…”

Section: ■ Introductionmentioning

confidence: 99%

Growth Mechanism and Magnetic Properties of Highly Crystalline NiO Nanocubes and Nanorods Fabricated by Evaporation

Chen

Wang

et al. 2012

Crystal Growth & Design

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A new approach to the preparation of regularly shaped NiO nanocubes and nanorods by an infrared heating evaporation method is presented. The growth model is proposed to be a vapor–solid mechanism. The morphology of the nanocrystals can be tuned by the carrier gas flow rate. The samples consist of nanocrystals that are highly crystallized with atomic-scale smooth surfaces. This novel method could be extended to nanocrystal growth of other oxides with low volatility or high melting points. The results of magnetic characterization indicate that the NiO nanorods and nanocubes grown from a mixed target both show weak ferromagnetic states at low and room temperature due to uncompensated spins at the surfaces of the nanocrystals.

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Preparation and electrochemistry of NiO/SiNW nanocomposite electrodes for electrochemical capacitors

Cited by 57 publications

References 29 publications

Highly N-doped Silicon Nanowires as a Possible Alternative to Carbon for On-chip Electrochemical Capacitors

Highly N-doped Silicon Nanowires as a Possible Alternative to Carbon for On-chip Electrochemical Capacitors

Electrochemically Fabricated Nanostructures in Energy Storage and Conversion Applications

Growth Mechanism and Magnetic Properties of Highly Crystalline NiO Nanocubes and Nanorods Fabricated by Evaporation

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