Electrochemical properties of arc-black and carbon nano-balloon as electrochemical capacitor electrodes

Sato, Tetuji; Suda, Yoshiyuki; Uruno, Hikaru; Takikawa, Hirofumi; Tanoue, Hideto; Ue, Hitoshi; Aoyagi, Nobuyoshi; Okawa, Takashi; Shimizu, Kazuki

doi:10.1088/1742-6596/352/1/012032

Cited by 6 publications

(4 citation statements)

References 21 publications

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“…AcB was prepared using a twin-torch arc discharge apparatus. [14][15][16] Two electrodes in the shape of an arc torch were placed at an acute angle in the chamber. The material of the electrode is graphite.…”

Section: Synthesis Of Carbon Nanomaterialsmentioning

confidence: 99%

Improvement in the Characteristics of Electric Double Layer Capacitor Using a Mixture of Arc Black and Carbon Nanoballoon

Okabe

Izumi

Suda

et al. 2013

Jpn. J. Appl. Phys.

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Carbon nanomaterials with different structures were mixed for an electric double layer capacitor (EDLC) electrode. We used two kinds of carbon nanomaterial: arc black (AcB) and a carbon nanoballoon (CNB). Arc black was synthesized by arc discharge. CNB was produced by heating the prepared AcB at 2400 °C. AcB mostly consists of an amorphous component and has a large specific surface area. On the other hand, CNB has a graphitic surface and a high conductivity. To utilize their characteristics, AcB and CNB were used as the main materials of the EDLC electrode in weight ratios of 1:1, 2:1, and 1:2. The obtained EDLC electrode was filled with 1 M H2SO4 as the electrolyte. As a result, by mixing AcB and CNB, both the power and energy densities became higher than those of AcB or CNB alone. The EDLC mixed in 1:1 weight ratio of AcB and CNB showed the highest performance, with a higher electric power density than activated carbon (AC).

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Section: Synthesis Of Carbon Nanomaterialsmentioning

confidence: 99%

Improvement in the Characteristics of Electric Double Layer Capacitor Using a Mixture of Arc Black and Carbon Nanoballoon

Okabe

Izumi

Suda

et al. 2013

Jpn. J. Appl. Phys.

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“…In our laboratory, we have succeeded in the large-scale synthesis of carbon particles and nanocoils in gram quantities, and investigated their applications. They are expected to find use in field electron emitters [2,3], super capacitors [4,5], and fuel cells [1,6,7].…”

Section: Introductionmentioning

confidence: 99%

Use of Carbon Nanomaterials as a Catalyst Support in Fuel Cells

Suda

2016

MSF

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PtRu or Pt catalysts were supported on four types of carbon nanomaterials with different shapes, sizes, and graphitic and electrical properties, and their resulting catalytic activities were evaluated by electrochemical methods. The carbon nanomaterials used included two types of particles: Arc Black (AcB) and Vulcan XC-72R (Vulcan), and two types of nanofibers: carbon nanocoils (CNC) and VGCF-X. Pt and Ru were loaded onto the nanomaterials by a reduction method using sodium borohydride. Transmission electron microscopy and X-ray diffraction (XRD) revealed the PtRu catalyst particles to be 4–6 nm in diameters. The shifts in the Pt (111) XRD peaks of the catalysts on CNC and VGCF-X were larger than those on AcB and Vulcan, indicating a higher degree of alloying between Pt and Ru. The diameters of the CNC-supported Pt and PtRu catalyst particles had the narrowest distributions and were constant within the range of catalyst loadings investigated. Electrochemical studies of the catalysts during methanol oxidation were carried out using cyclic voltammetry. The catalyst particles supported on CNC and VGCF-X exhibited higher catalytic activity than those on AcB and Vulcan. The effect of the surface area of the carbon nanomaterials on the catalytic activity is discussed.

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“…can be found in hybrid electrical vehicles, in industrial power and energy management, and in renewable energy systems . However, the commercial supercapacitors' relatively low energy density restricts their application in energy storage systems . Usually, two strategies are used to overcome this weakness.…”

Section: Introductionmentioning

confidence: 99%

Effect of carbon nanotube loadings on supercapacitor characteristics

Huang

Kirk

Thorpe

et al. 2014

Int. J. Energy Res.

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SUMMARYIn order to improve the properties of electrodes based on carbon nanotubes (CNTs), nanocomposite electrodes of CNTs/ activated carbon (AC) are prepared. The effect of CNT loadings on the performance of the nanocomposite electrodes is evaluated by electrochemical methods. Scanning electron microscopy images show the CNTs are well dispersed, entwine with the AC, and form a more conductive network in a nanocomposite electrode. When CNT loadings increase from 0 to 10 wt%, the capacitance increases by 15% (89.4 to 102.5 F g À1 ), and the equivalent series resistance (ESR) decreases by 13% (0.93 to 0.81 Ω). The capacitance improvement has an optimum CNT loading of about 6 to 10 wt%. The decreased ESR with high CNT loadings does not prevent capacitance loss at sweep rates greater than 50 mV s À1. The nanocomposite electrode shows good cycle performance with no capacity loss after 5000 cycles at a scan rate of 500 mV s À1 . These results indicate that the CNT-based nanocomposite electrodes would be a promising material for use in supercapacitors. Copyright

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Electrochemical properties of arc-black and carbon nano-balloon as electrochemical capacitor electrodes

Cited by 6 publications

References 21 publications

Improvement in the Characteristics of Electric Double Layer Capacitor Using a Mixture of Arc Black and Carbon Nanoballoon

Improvement in the Characteristics of Electric Double Layer Capacitor Using a Mixture of Arc Black and Carbon Nanoballoon

Use of Carbon Nanomaterials as a Catalyst Support in Fuel Cells

Effect of carbon nanotube loadings on supercapacitor characteristics

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