High-performance aqueous asymmetric supercapacitor based on carbon nanofibers network and tungsten trioxide nanorod bundles electrodes

Peng, Hui; Ma, Guofu; Sun, Kanjun; Mu, Jingjing; Luo, Mingliang; Lei, Ziqiang

doi:10.1016/j.electacta.2014.09.100

Cited by 84 publications

(55 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This volumetric capacitance, measured at a relatively high current density (10 A cm À3 ), is comparable to data reported in the literature (see e.g. refs [17,19] For a more direct comparison, our results (that were measured in a neutral electrolyte and without using any additive) can be also for m-WO 3-x electrodes used in acidic electrolytes [62]. Worth noting, results reported for WO 3 electrodes are mostly measured in acidic media.…”

Section: à3supporting

confidence: 89%

See 1 more Smart Citation

On the Supercapacitive Behaviour of Anodic Porous WO3-Based Negative Electrodes

Upadhyay

Altomare

Eugénio

et al. 2017

Electrochimica Acta

View full text Add to dashboard Cite

Keywords: electrochemical anodization WO 3 nanostructure phosphoric acid supercapacitor energy storage A B S T R A C T Herein we illustrate the functionality as pseudocapacitive material of tungsten trioxide (WO 3 ) nanochannel layers fabricated by electrochemical anodization of W metal in pure hot ortho-phosphoric acid (o-H 3 PO 4 ). These layers are characterized by a defined nanochannel morphology and show remarkable pseudocapacitive behaviour in the negative potential (À0.8-0.5 V) in neutral aqueous electrolyte (1 M Na 2 SO 4 ). The maximum volumetric capacitance of 397 F cm À3 is obtained at 2 A cm À3. The WO 3 nanochannel layers display full capacitance retention (up to 114%) after 3500 charge-discharge cycles performed at 10 A cm À3 . The relatively high capacitance and retention ability are attributed to the high surface area provided by the regular and defined nanochannel morphology. Kinetic analysis of the electrochemical results for the best performing WO 3 structures, i.e., grown by 2 h-long anodization, reveals the occurrence of pseudocapacitance and diffusional controlled processes. Electrochemical impedance spectroscopy measurements show for the same structures a relatively low electrical resistance, which is the plausible cause for the superior electrochemical behaviour compared to the other structures.

show abstract

Section: à3supporting

confidence: 89%

“…This enhancement results from the additive effect of fast superficial redox reactions and electric double layer formation at the electrode/electrolyte interface. [12,[16][17][18][19][20][21][22][23] show promising pseudocapacitive behaviour as well as reasonable capacity retention in asymmetric systems in the negative potential region.…”

Section: Introductionmentioning

confidence: 99%

On the Supercapacitive Behaviour of Anodic Porous WO3-Based Negative Electrodes

Upadhyay

Altomare

Eugénio

et al. 2017

Electrochimica Acta

View full text Add to dashboard Cite

show abstract

“…Due to q + = q -, the mass ratio of the positive (m + ) and negative electrodes (m -) will follow the equation (3) [31,32]:…”

Section: Fabrication Of Asymmetric Supercapacitormentioning

confidence: 99%

“…The power density (P) of the asymmetric supercapacitor was achieved by the energy density (E) and the discharge time (t) according to the equation (5) [31,32]:…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Facile hydrothermal synthesis of NiTe and its application as positive electrode material for asymmetric supercapacitor

Zhou

Fan

et al. 2016

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…1(A)). This peak can be indexed to (0 0 2) reflection plane, which indicates the presence of graphite like carbon [32,33]. The composite displays four additional peaks for silver ( Fig.…”

Section: Xrd Sem and Edx Analysismentioning

confidence: 96%