Performance enhancement of micro-supercapacitor by coating of graphene on silicon nanowires at room temperature

Soam, Ankur; Kavle, Pravin; Kumbhar, Avinash S.; Dusane, Rajiv O.

doi:10.1016/j.cap.2016.11.011

Cited by 47 publications

(21 citation statements)

References 37 publications

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“…As displayed in Figure , Nyquist plots consist of a semicircle in the high frequency region and a vertical line in the low frequency region. The semicircle diameter represents the charge transfer resistance of the electrode and the straight line reveals the capacitive behaviour . As compared with pure NiFe 2 O 4 , the NiFe 2 O 4 /graphene nanocomposite shows much smaller semicircle and vertical line, indicating lower charge transfer resistance .…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Nickel Ferrite Nanoparticles Supported on Graphene Nanosheets as Composite Electrodes for High Performance Supercapacitor

et al. 2019

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This study presents a fabrication and electrochemical properties of nickel ferrite/graphene nanocomposite as electrodes material for supercapacitor application. The as-prepared electrode was characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy and Xray photoelectron spectroscopy. The electrochemical properties were measured using cyclic voltammetry, galvanostatic charging/discharging methods and electrochemical impedance spectroscopy. Graphene nanosheets play an important role of governing the morphology of the electrode material and thereby enhancing the electrochemical performance of the composite electrode. The specific capacitance of 207 F/g is obtained for nickel ferrite/graphene nanocomposite, which is almost 4 times larger than pure nickel ferrite. The nanocomposite showed a stable capacitance of 95% after 1000 cycles in 1 M Na 2 SO 4 electrolyte. Electrochemical impedance spectroscopy results indicate that graphene nanosheets reduced the charge transfer resistance on the composite electrode. The obtained results show that the nanocomposite has a great potential to be used in supercapacitor with good electrochemical performance and longer cycle stability.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Nickel Ferrite Nanoparticles Supported on Graphene Nanosheets as Composite Electrodes for High Performance Supercapacitor

et al. 2019

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“…Carbon‐based materials have been used widely as an active electrode material for the development of μ‐SCs devices. However, the integration of carbon‐based materials in Si‐based ICs is relatively challenging . To solve this technological bottleneck, Si IC‐compatible materials that can be deposited using microfabrication compatible methods (e.g., sputtering, atomic layer deposition, evaporation) are preferred.…”

Section: Introductionmentioning

confidence: 99%

Fractal Electrochemical Microsupercapacitors

Hota

Jiang

Mashraei

et al. 2017

Adv Elect Materials

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The first successful fabrication of microsupercapacitors (μ‐SCs) using fractal electrode designs is reported. Using sputtered anhydrous RuO2 thin‐film electrodes as prototypes, μ‐SCs are fabricated using Hilbert, Peano, and Moore fractal designs, and their performance is compared to conventional interdigital electrode structures. Microsupercapacitor performance, including energy density, areal and volumetric capacitances, changes with fractal electrode geometry. Specifically, the μ‐SCs based on the Moore design show a 32% enhancement in energy density compared to conventional interdigital structures, when compared at the same power density and using the same thin‐film RuO2 electrodes. The energy density of the Moore design is 23.2 mWh cm−3 at a volumetric power density of 769 mW cm−3. In contrast, the interdigital design shows an energy density of only 17.5 mWh cm−3 at the same power density. We show that active electrode surface area cannot alone explain the increase in capacitance and energy density. We propose that the increase in electrical lines of force, due to edging effects in the fractal electrodes, also contribute to the higher capacitance. This study shows that electrode fractal design is a viable strategy for improving the performance of integrated μ‐SCs that use thin‐film electrodes at no extra processing or fabrication cost.

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“…Various important gas-phase species for surface saturations have been explored theoretically. [20][21][22] Among the existing passivation methods, HF and nitridation show the better performance than that of carbide. During the surface treatment, part improve the surface property of SiNWs to remove the oxide layer by HF etching.…”

Section: Silicon Nanowires (Sinws) Passivationmentioning

confidence: 99%

Silicon nanowires (SiNWs) surface engineering potential for bioenergy

Guo¹

2018

MOJABB

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of the surface oxide layer of SiNWs could be removed and the surface composition may be changed. Meanwhile, for the nitridation, there will be a nitride layer formed due to the reaction between the oxide and nitrogen species and the silicon nitride is air inert to the exposure and can prevent SiNWs from further oxidation. Silicon nanowires (SiNWs) HF treatment The silicon oxide layer of SiNWs serves as a protective layer rendering SiNWs relatively inert. The inertness of SiNWs is unfavorable for SiNWs applications. Thus, it is significant to

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Performance enhancement of micro-supercapacitor by coating of graphene on silicon nanowires at room temperature

Cited by 47 publications

References 37 publications

Synthesis of Nickel Ferrite Nanoparticles Supported on Graphene Nanosheets as Composite Electrodes for High Performance Supercapacitor

Synthesis of Nickel Ferrite Nanoparticles Supported on Graphene Nanosheets as Composite Electrodes for High Performance Supercapacitor

Fractal Electrochemical Microsupercapacitors

Silicon nanowires (SiNWs) surface engineering potential for bioenergy

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