Exaggerated capacitance using electrochemically active nickel foam as current collector in electrochemical measurement

Wang, Xing; Qiao, Shi Zhang; Wu, Xiaozhong; Gao, Xiuli; Zhou, Jin; Zhuo, Shuping; Hartono, Sandy Budi; Hulicova‐Jurcakova, Denisa

doi:10.1016/j.jpowsour.2010.12.003

Cited by 178 publications

(92 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the literature [43], nickel foam also has a certain specific capacitance. In order to avoid the interference of Ni foam, CV (−1.0-(−0.3 V)) and galvanostatic charge-discharges (−1.0-(−0.3 V)) were performed in a three-electrode cell equipped with a piece of Ni foam (1 cm × 1 cm) as working electrode (without any active electrode material loaded on this Ni foam).…”

Section: Resultsmentioning

confidence: 99%

One-Step Self-Assembly Synthesis α-Fe2O3 with Carbon-Coated Nanoparticles for Stabilized and Enhanced Supercapacitors Electrode

Yan

Tang

et al. 2017

Energies

View full text Add to dashboard Cite

Abstract:A cocoon-like α-Fe 2 O 3 nanocomposite with a novel carbon-coated structure was synthesized via a simple one-step hydrothermal self-assembly method and employed as supercapacitor electrode material. It was observed from electrochemical measurements that the obtained α-Fe 2 O 3 @C electrode showed a good specific capacitance (406.9 Fg −1 at 0.5 Ag −1 ) and excellent cycling stability, with 90.7% specific capacitance retained after 2000 cycles at high current density of 10 Ag −1 . These impressive results, presented here, demonstrated that α-Fe 2 O 3 @C could be a promising alternative material for application in high energy density storage.

show abstract

Section: Resultsmentioning

confidence: 99%

One-Step Self-Assembly Synthesis α-Fe2O3 with Carbon-Coated Nanoparticles for Stabilized and Enhanced Supercapacitors Electrode

Yan

Tang

et al. 2017

Energies

View full text Add to dashboard Cite

show abstract

“…Ni foam has been blamed for contributing to the measured capacitance in electrochemical devices such as supercapacitors. [ 39 ] To clarify this, we also tested the electrochemical performance of Li-O 2 battery with Ni-foam only electrode at 0.166 mA cm −2 . The specifi c capacity of the Li-O 2 battery is only 0.055 mAh cm −2 (SI, Figure S4), while that with 3D-G-MnO 2 catalyst is 4.316 mAh cm −2 .…”

Section: Electrochemical Properties Of Li-o 2 Batteries With 3d-g-mnomentioning

confidence: 99%

Direct Growth of Flower‐Like δ‐MnO₂ on Three‐Dimensional Graphene for High‐Performance Rechargeable Li‐O₂ Batteries

Liu

Zhu

Xie

et al. 2014

Advanced Energy Materials

160

View full text Add to dashboard Cite

A challenge still remains to develop high‐performance and cost‐effective air electrode for Li‐O2 batteries with high capacity, enhanced rate capability and long cycle life (100 times or above) despite recent advances in this field. In this work, a new design of binder‐free air electrode composed of three‐dimensional (3D) graphene (G) and flower‐like δ‐MnO2 (3D‐G‐MnO2) has been proposed. In this design, graphene and δ‐MnO2 grow directly on the skeleton of Ni foam that inherits the interconnected 3D scaffold of Ni foam. Li‐O2 batteries with 3D‐G‐MnO2 electrode can yield a high discharge capacity of 3660 mAh g−1 at 0.083 mA cm−2. The battery can sustain 132 cycles at a capacity of 492 mAh g−1 (1000 mAh gcarbon −1) with low overpotentials under a high current density of 0.333 mA cm−2. A high average energy density of 1350 Wh Kg−1 is maintained over 110 cycles at this high current density. The excellent catalytic activity of 3D‐G‐MnO2 makes it an attractive air electrode for high‐performance Li‐O2 batteries.

show abstract

“…Another issue is the pseudocapacitive contribution of the Ni foam surface, which might interfere the capacitance calculation, but as we have calculated, if the mass-loadings of the active materials are high enough to achieve a large areal capacitance (e.g. >4 F cm −2 ), the inevitable substrate contribution (~0.2 F cm −2 ) can be neglected [23]. In a word, Ni foam is a good current collector in alkaline or neutral electrodes as long as we subtract the possible capacitive contribution to get corrected specific capacitances of the active material [24].…”

Section: Substrates and Synthetic Methodsmentioning

confidence: 99%

Transition metal oxides/hydroxides nanoarrays for aqueous electrochemical energy storage systems

Jiang

et al. 2014

Sci. China Mater.

View full text Add to dashboard Cite

The need for the development of efficient electrochemical energy storage devices with high energy density, power density and safety is becoming more and more urgent in recent years, and the key for achieving the outstanding performance is the suitable structural designing of active materials. Nanoarray architecture emerged as one of the most promising structures, as it can offer many advantages to boost the electrochemical performance. Specifically, this kind of integrated electrodes can provide a large electrochemically active surface area, faster electron transport and electrolyte ion diffusion, leading to substantially improved capacitive, rate and cycling performances. In this paper, we will review the recent advances in strategies for synthesis of materials with nanoarray architectures and their applications in supercapacitors and batteries.

show abstract

Exaggerated capacitance using electrochemically active nickel foam as current collector in electrochemical measurement

Cited by 178 publications

References 47 publications

One-Step Self-Assembly Synthesis α-Fe2O3 with Carbon-Coated Nanoparticles for Stabilized and Enhanced Supercapacitors Electrode

One-Step Self-Assembly Synthesis α-Fe2O3 with Carbon-Coated Nanoparticles for Stabilized and Enhanced Supercapacitors Electrode

Direct Growth of Flower‐Like δ‐MnO₂ on Three‐Dimensional Graphene for High‐Performance Rechargeable Li‐O₂ Batteries

Transition metal oxides/hydroxides nanoarrays for aqueous electrochemical energy storage systems

Contact Info

Product

Resources

About

Exaggerated capacitance using electrochemically active nickel foam as current collector in electrochemical measurement

Cited by 178 publications

References 47 publications

One-Step Self-Assembly Synthesis α-Fe2O3 with Carbon-Coated Nanoparticles for Stabilized and Enhanced Supercapacitors Electrode

One-Step Self-Assembly Synthesis α-Fe2O3 with Carbon-Coated Nanoparticles for Stabilized and Enhanced Supercapacitors Electrode

Direct Growth of Flower‐Like δ‐MnO2 on Three‐Dimensional Graphene for High‐Performance Rechargeable Li‐O2 Batteries

Transition metal oxides/hydroxides nanoarrays for aqueous electrochemical energy storage systems

Contact Info

Product

Resources

About

Direct Growth of Flower‐Like δ‐MnO₂ on Three‐Dimensional Graphene for High‐Performance Rechargeable Li‐O₂ Batteries