Fabrication of porous nickel oxide film with open macropores by electrophoresis and electrodeposition for electrochemical capacitors

Wu, Mao‐Sung; Wang, Min-Jyle; Jow, Jiin-Jiang

doi:10.1016/j.jpowsour.2009.12.136

Cited by 115 publications

(62 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[30,31] Besides, our previous studies demonstrated a hierarchically porous NiO film grown by chemical bath deposition and its superior pseudocapacitive performance. [32] Up until now, there have been no reports of a graphene/porous NiO hybrid film for supercapacitor applications.…”

Section: Introductionmentioning

confidence: 92%

Graphene Sheet/Porous NiO Hybrid Film for Supercapacitor Applications

Xia

Mai

et al. 2011

Chemistry A European J

275

146

View full text Add to dashboard Cite

We report the preparation of a nickel-foam-supported graphene sheet/porous NiO hybrid film by the combination of electrophoretic deposition and chemical-bath deposition. The obtained graphene-sheet film of about 19 layers was used as the nanoscale substrate for the formation of a highly porous NiO film made up of interconnected NiO flakes with a thickness of 10-20 nm. The graphene sheet/porous NiO hybrid film exhibits excellent pseudocapacitive behavior with pseudocapacitances of 400 and 324 F g(-1) at 2 and 40 A g(-1), respectively, which is higher than those of the porous NiO film (279 and 188 F g(-1) at 2 and 40 A g(-1)). The enhancement of the pseudocapacitive properties is due to reinforcement of the electrochemical activity of the graphene-sheet film.

show abstract

Section: Introductionmentioning

confidence: 92%

Graphene Sheet/Porous NiO Hybrid Film for Supercapacitor Applications

Xia

Mai

et al. 2011

Chemistry A European J

275

146

View full text Add to dashboard Cite

show abstract

“…The shapes of the curves differed from those of ideal electrochemical double-layer capacitance, showing two redox peaks which are responsible for the pseudocapacitive behavior of the electrode materials. The oxidation peak observed at 0.419 V is due to the conversion of NiO to NiOOH, while the reduction peak at 0.192 V is due to the reverse reaction [39,43] as represented by Equation (1) below:…”

Section: Methodsmentioning

confidence: 99%

Chemical adsorption of NiO nanostructures on nickel foam-graphene for supercapacitor applications

et al. 2013

View full text Add to dashboard Cite

Few-layer graphene was synthesized on a nickel foam template by chemical vapour deposition (CVD). The resulting three-dimensional (3D) graphene was loaded with nickel oxide nanostructures using the successive ionic layer adsorption and reaction (SILAR) technique. The composites were characterized and investigated as electrode material for supercapacitors. Raman spectroscopy measurements on the sample revealed that the 3D graphene consisted of mostly few layers, while X-ray diffractometry (XRD) and scanning electron microscopy (SEM) revealed the presence of nickel oxide. The electrochemical properties were investigated using cyclic voltammetry, electrochemical impedance spectroscopy and potentiostatic charge-discharge in aqueous KOH electrolyte. The novelty of this work is the use of the 3D porous cell structure of the nickel foam which allows for the growth of highly conductive graphene and subsequently provides support for uniform adsorption of the NiO onto the graphene. The NF-G/NiO electrode material showed excellent properties as a pseudocapacitive device with a high specific capacitance value of 783 Fg -1 at a scan rate of 2 mVs -1 . The device also exhibited excellent cycle stability, with 84% retention of the initial capacitance after 1,000 cycles. The results demonstrate that composites made using 3D graphene are versatile and show considerable promise as electrode materials for supercapacitor applications.

show abstract

“…The semicircle in the high frequency region is ascribed to the charge transfer resistance (R ct ) caused by the Faradaic reaction and the double layer capacitance (C dl ) on the electrode surface. 60 A smaller semicircle diameter suggests that the R ct for G-CSL is smaller because of the larger electroactive surface area of the material. 60 The straight line with an angle at almost 45° with the real part Z' corresponds to the Warburg resistance (Z w ) and is the result of the frequency dependence of ion diffusion in the electrolyte 61 .…”

Section: Ac Electrochemical Impedance Spectroscopy (Eis) Is a Well-dementioning

confidence: 99%

Electrostatic-Induced Assembly of Graphene-Encapsulated Carbon@Nickel–Aluminum Layered Double Hydroxide Core–Shell Spheres Hybrid Structure for High-Energy and High-Power-Density Asymmetric Supercapacitor

Hui

Hui³

et al. 2016

ACS Appl. Mater. Interfaces

101

View full text Add to dashboard Cite

Achieving high energy density while retaining high power density is difficult in electrical double-layer capacitors and in pseudocapacitors considering the origin of different charge storage mechanisms. Rational structural design became an appealing strategy in circumventing these trade-offs between energy and power densities. A hybrid structure consists of chemically converted graphene-encapsulated carbon@nickel-aluminum layered double hydroxide core-shell spheres as spacers among graphene layers (G-CLS) used as an advanced electrode to achieve high energy density while retaining high power density for high-performance supercapacitors. The merits of the proposed architecture are as follows: (1) CLS act as spacers to avoid the close restacking of graphene; (2) highly conductive carbon sphere and graphene preserve the mechanical integrity and improve the electrical conductivity of LDHs hybrid. Thus, the proposed hybrid structure can simultaneously achieve high electrical double-layer capacitance and pseudocapacitance resulting in the overall highly active electrode. The G-CLS electrode exhibited high specific capacitance (1710.5 F g −1 at 1 A g −1 ) under three-electrode tests. An ASC fabricated using the G-CLS as positive electrode and reduced graphite oxide as negative electrode demonstrated remarkable electrochemical performance. The ASC device operated at 1.4 V, and delivered a high energy density of 35.5 Wh kg −1 at a 670.7 W kg −1 power density at 1 A g −1 with an excellent rate capability, as well as a robust long-term cycling stability of up to 10 000 cycles.

show abstract

Fabrication of porous nickel oxide film with open macropores by electrophoresis and electrodeposition for electrochemical capacitors

Cited by 115 publications

References 42 publications

Graphene Sheet/Porous NiO Hybrid Film for Supercapacitor Applications

Graphene Sheet/Porous NiO Hybrid Film for Supercapacitor Applications

Chemical adsorption of NiO nanostructures on nickel foam-graphene for supercapacitor applications

Electrostatic-Induced Assembly of Graphene-Encapsulated Carbon@Nickel–Aluminum Layered Double Hydroxide Core–Shell Spheres Hybrid Structure for High-Energy and High-Power-Density Asymmetric Supercapacitor

Contact Info

Product

Resources

About