High performance electrochemical capacitors based on MnO<sub>2</sub>/activated-carbon-paper

Cheng, Zhiyu; Tan, Guiping; Qiu, Yongfu; Guo, Bing; Cheng, Faliang; Fan, Hongsong

doi:10.1039/c5tc00645g

Cited by 40 publications

(24 citation statements)

References 30 publications

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“…5(b), the charge-discharge curves of the MnO 2 /CFP-12 composite electrode at different current densities generally show approximately symmetrical and linearly profiles, demonstrating its excellent supercapacitive behaviors [20]. Based on the discharge curves at different current densities, the specific capacitance of the MnO 2 /CFP-12 composite is estimated according to the following equation (Eq.…”

Section: Resultsmentioning

confidence: 99%

“…The hybrid supercapacitors comprising both MnO 2 and carbon materials have been extensively studied, since the high specific surface areas and high conductivity of carbon materials [15][16][17][18][19][20][21][22][23]. These electrodes rendered a specific capacitance from $133 to $1270.5 F/g.…”

Section: Introductionmentioning

confidence: 99%

“…Needle-like MnO 2 coated carbon fabric brought a specific capacitance as high as 432 F/g at a density of 5 A/g in 1 M Na 2 SO 4 aqueous electrolyte [18]. The MnO 2 nanoribbons anchored on the activated carbon paper (MnO 2 /ACP) provided specific capacitances of 617.0 and 395.0 F/g from cyclic voltammograms with a scan rate of 20 and 50 mV/s, respectively [20].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Self-grown MnO 2 nanosheets on carbon fiber paper as high-performance supercapacitors electrodes

Dang

Dong

Zhang

et al. 2016

Electrochimica Acta

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Self-grown MnO 2 nanosheets on carbon fiber paper as high-performance supercapacitors electrodes

Dang

Dong

Zhang

et al. 2016

Electrochimica Acta

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“…2D MnO x nanomaterials, such as nanosheets, nanofilms, and nanoflakes, are the most studied morphology types due to their large surface areas that are enriched in redox‐active sites . Unlike the 0D and 1D types, 2D nanomaterials can be used to make free‐standing, substrate‐free electrodes.…”

Section: Structural Design Of Mnox Materials In Electrodesmentioning

confidence: 99%

Manganese‐Oxide‐Based Electrode Materials for Energy Storage Applications: How Close Are We to the Theoretical Capacitance?

Wang

2018

Advanced Materials

104

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Of the transition metals, Mn has the greatest number of different oxides, most of which have a special tunnel structure that enables bulk redox reactions. The high theoretical capacitance and capacity results from a greater number of accessible oxidation states than other transition metals, wide potential window, and the high natural abundance make MnO species promising electrode materials for energy storage applications. Although MnO electrode materials have been intensely studied over the past decade, their electrochemical performance is still insufficient for practical applications. Currently, there is a trade-off between specific capacitance and loading mass. MnO species have intrinsically poor electrical conductivity, and current structural designs are not sophisticated enough to accommodate enough redox-active sites. Recent studies have certainly made progress in increasing capacitance through making use of electrically conductive components and controlling the morphology of the MnO species to expose more surface area. To increase the capacitance of MnO electrodes to the largest extent without limiting loading mass, further structural design at the nanoscale and manipulation of the electrically conductive component are required. An ideal nanostructure is proposed to guide future research toward closing the gap between achieved and theoretical capacitance, without limiting the loading mass.

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“…In addition to the areal capacitance, the cycle life is another important factor for supercapacitors in particular application [20]. In Fig.…”

Section: Cyclic Voltammetry Galvanostatic Charge/discharge and Eismentioning

confidence: 99%

Improved performance of supercapacitors constructed with activated carbon papers as electrodes and vanadyl sulfate as redox electrolyte

Zhen

Wen

Guo

et al. 2016

Ionics

Self Cite

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In this report, the supercapacitor was constructed with activated carbon paper as electrodes and 3 M H 2 SO 4 solution bearing 1 M VOSO 4 as electrolyte. This supercapacitor showed high areal capacitance of 2146 mF/ cm 2 with around 16 times higher than that of 134 mF/cm 2 in pristine electrolyte of 3 M H 2 SO 4 and good cycling performance retaining 92 % after 5000 cycles. The full-scale and enlarged Nyquist-type impedance spectra further indicate that the supercapacitor has low diffusion resistance and exhibits good power capability. Constructed by this way, the performances of supercapacitors were improved for the synergistic effect of the absorbance and catalysis of the activated carbon paper as well as redox properties of the couples VO 2+ /VO 2 + .

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High performance electrochemical capacitors based on MnO₂/activated-carbon-paper

Abstract: The composite MnO2/activated-carbon-paper has been reported for the first time and it shows high specific capacitance and remarkable rate capability as an electrochemical capacitor.

Cited by 40 publications

References 30 publications

Self-grown MnO 2 nanosheets on carbon fiber paper as high-performance supercapacitors electrodes

Self-grown MnO 2 nanosheets on carbon fiber paper as high-performance supercapacitors electrodes

Manganese‐Oxide‐Based Electrode Materials for Energy Storage Applications: How Close Are We to the Theoretical Capacitance?

Improved performance of supercapacitors constructed with activated carbon papers as electrodes and vanadyl sulfate as redox electrolyte

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High performance electrochemical capacitors based on MnO2/activated-carbon-paper

Abstract: The composite MnO2/activated-carbon-paper has been reported for the first time and it shows high specific capacitance and remarkable rate capability as an electrochemical capacitor.

Cited by 40 publications

References 30 publications

Self-grown MnO 2 nanosheets on carbon fiber paper as high-performance supercapacitors electrodes

Self-grown MnO 2 nanosheets on carbon fiber paper as high-performance supercapacitors electrodes

Manganese‐Oxide‐Based Electrode Materials for Energy Storage Applications: How Close Are We to the Theoretical Capacitance?

Improved performance of supercapacitors constructed with activated carbon papers as electrodes and vanadyl sulfate as redox electrolyte

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High performance electrochemical capacitors based on MnO₂/activated-carbon-paper