A Status Report on the Power Storage System of Capacitor-Electronics

Okamura, M.; Hasuike, Hiroshi; Yamagishi, Masaaki; Araki, Shuuichi

doi:10.5796/electrochemistry.69.414

Cited by 11 publications

(2 citation statements)

References 4 publications

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“…Recently, characteristics of EDLC 1 have been improved in many studies;2–8 however, some characteristics still need enhancement, such as the specific energy density and capacitance. EDLC utilizes the double layer formed at the interface between the nanoporous carbonaceous electrode and the nonaqueous electrolyte solution.…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of Carbon Electrode for Electric Double Layer Capacitor

Tashima

Kurosawatsu

Otsubo

et al. 2007

Plasma Process. Polym.

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In this research, spatio‐temporal profiles of positive and negative charges in an electric double layer capacitor (EDLC) which consists of activated carbon, treated by plasma discharges were measured. The plasma type was a high frequency glow discharge and the sample of activated carbon is set in the center of glow discharge. Optimal conditions for plasma surface treatment of activated carbon was examined from 0 to 60 min at 150 °C in nitrogen gas. As a result, nitrogen atom was doped onto the surface layer of the activated carbon. In addition, electron spectroscopy for chemical analysis (ESCA) spectra of nitrogen in the activated carbon was examined. By etching the surface layer of carbon electrode exposed to the plasma, the doped nitrogen atom penetrated about 3 nm of the surface layer of carbon electrode after 60 min of plasma surface treatment.

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Section: Introductionmentioning

confidence: 99%

Surface Modification of Carbon Electrode for Electric Double Layer Capacitor

Tashima

Kurosawatsu

Otsubo

et al. 2007

Plasma Process. Polym.

View full text Add to dashboard Cite

show abstract

“…Recently, characteristics of electric double layer capacitors (EDLCs) 1) have been improved in many studies; [2][3][4][5][6][7][8] however, some characteristics still need enhancement, such as the specific energy density and capacitance. EDLCs utilize the double layer formed at the interface between the nanoporous carbonaceous electrode and the nonaqueous electrolyte solution.…”

Section: Introductionmentioning

confidence: 99%

Plasma Surface Treatment of Carbonaceous Materials for Application in Electric Double Layer Capacitors

Tashima¹,

Kurosawatsu²,

Uota³

et al. 2006

Jpn. J. Appl. Phys.

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In this work, carbonaceous materials were modified in order to improve capacitance and charge density in electric double layer capacitors (EDLCs). Optimal conditions for plasma surface treatment of activated carbon have been examined for times from 1 to 10 h at 150 °C. The plasma is a high-frequency glow discharge in N2. The pressure of the gas is 13.3 Pa. The electrode is set up so that the EDLC sample is covered with the glow discharge. Specific capacitance and charge density can be improved by plasma surface treatment of carbon materials.

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Comparison of the characteristics of electric double-layer capacitors with an activated carbon powder and an activated carbon fiber

TANAHASHI

2005

J Appl Electrochem

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The characteristics of electric double-layer capacitors (EDLCs) with activated carbon powder (ACP), pulverized activated carbon fiber (ACF), and ACF-cloth have been compared. The BET surface areas of the ACP and ACF were estimated to be 1740 and 1970 m 2 g )1 , respectively. In the pore-size distribution curve of the ACP and ACF, the most dominant pore diameter was 1.8 and 1.1 nm for the ACP and ACF, respectively. Disc-and cloth-type of electrodes were fabricated using ACP and ACF. The electrical resistance of the ACF-disc and ACF-cloth electrodes was four orders of magnitudes lower than that of the ACP-disc electrodes. In accordance with the lower electrical resistance of the ACF-disc and ACF-cloth, the d.c. resistance of the EDLC with the ACF-disc and with ACF-cloth was lower than that of the EDLC with the ACP-disc. The highest specific volume capacitance of 28.3 F cm )3 (capacitance / volume of total ACF in the EDLC) was achieved with the ACF-disc. In the cyclic voltammograms of the ACF-disc, the stable electric double-layer charging and discharging behavior was observed.

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A Status Report on the Power Storage System of Capacitor-Electronics

Cited by 11 publications

References 4 publications

Surface Modification of Carbon Electrode for Electric Double Layer Capacitor

Surface Modification of Carbon Electrode for Electric Double Layer Capacitor

Plasma Surface Treatment of Carbonaceous Materials for Application in Electric Double Layer Capacitors

Comparison of the characteristics of electric double-layer capacitors with an activated carbon powder and an activated carbon fiber

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