TANSO
Online ISSN : 1884-5495
Print ISSN : 0371-5345
ISSN-L : 0371-5345
Search
Advanced search
OR
Browse
Search
Volume 2015, Issue 268
Displaying 1-9 of 9 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
Review Paper
Technical Report
Review Papers
  • Current features of traditional carbon materials
    Isao Mochida, Seong-Ho Yoon, Jin Miyawaki
    Article type: Review Paper
    2015 Volume 2015 Issue 268 Pages 138-144
    Published: June 15, 2015
    Released on J-STAGE: July 15, 2015
    DOIhttps://doi.org/10.7209/tanso.2015.138
    JOURNAL RESTRICTED ACCESS
    Show abstractHide abstract
    Traditional carbon materials which have a long history of industrial importance have been competitive products in Japan for the last 30 years. Nevertheless, their research and development have recently been hardly discussed in academic communities, being overwhelmed by modern nanocarbons. Traditional carbon materials which include metallurgical cokes, activated carbons, and carbon blacks are still dominant in industry, bringing profits in Japan from the international market. Rapidly developing countries in Asia are making great efforts to catch up with our carbon technologies. The traditional carbon materials have now a chance to be developed further based on advances acquired in nanocarbon science and technology. This paper overviews the current and possible future features of traditional carbons. The authors expect that dedicated efforts of the carbon community in the coming years will result in industrial profit and academic challenges.
    View full abstract
    Download PDF (7127K)
  • Comparative study of ternary graphite-potassium-metal (M=Tl, Hg, Au) intercalation compounds
    Sebastien Cahen, Mélissa Fauchard, Philippe Lagrange, Claire H&#x ...
    Article type: Review Paper
    2015 Volume 2015 Issue 268 Pages 145-153
    Published: June 15, 2015
    Released on J-STAGE: July 15, 2015
    DOIhttps://doi.org/10.7209/tanso.2015.145
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Potassium-thallium, potassium-mercury, and potassium-gold alloys can be intercalated into graphite, leading to the formation of poly-layered ternary compounds. Different ways of synthesis are involved for the preparation of the corresponding Graphite Intercalation Compounds (GICs). The as-prepared bulk GICs are described in a comparative study, regarding their chemical formula, their formation mechanism, and their structural and superconducting properties. Analogies and differences are pointed out.
    View full abstract
    Download PDF (899K)
Research Paper
  • Preparation of activated carbons with high specific surface areas using lignin and crab shells, and their use in methane adsorption
    Akihiro Yamashita, Toshiki Yoshida, Aki Hidaka, Tatsuya Oshima, Yoshin ...
    Article type: Research Paper
    2015 Volume 2015 Issue 268 Pages 154-159
    Published: June 15, 2015
    Released on J-STAGE: July 15, 2015
    DOIhttps://doi.org/10.7209/tanso.2015.154
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Methane gas is attracting much attention as an environmentally friendly alternative to petroleum. We have developed a high-safety and low-cost method for methane gas storage on activated carbons (ACs) prepared from biomass waste, to enable methane gas to be used effectively and safely. The ACs were prepared by the chemical activation of lignin and crab shell biomass waste with K2CO3. The optimum activated pore structure was determined using N2 adsorption isotherms, to enable the preparation of ACs with high methane adsorption capacities. The adsorption capacities of the prepared ACs and that of a commercially available active carbon were compared based on their methane adsorption isotherms at 298 K. The AC prepared from a mixture of lignin and crab shells had a maximum specific surface area of 3119 m2 g-1. The methane adsorption capacities of the ACs were particularly influenced by their micropore volumes.
    View full abstract
    Download PDF (593K)
Technical Reports
  • Weight loss of isotropic high-density graphite during oxidation
    Yukiko Sato, Shinji Shiota, Fumi Sano, Yumi Shimizu, Hirotaka Osaki, Y ...
    Article type: Technical Report
    2015 Volume 2015 Issue 268 Pages 160-165
    Published: June 15, 2015
    Released on J-STAGE: July 15, 2015
    DOIhttps://doi.org/10.7209/tanso.2015.160
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The weight loss of isotropic high-density graphite products as a result of oxidation was measured at different temperatures under a constant flow of dried air: at 550 °C for 24 h under an air flow of 4 L min-1, at 700 °C for 2.5 h under 4 L min-1, and at 1200 °C for 1 h under 2 L min-1. By observing the changes in the surface and cross-section of the specimen with oxidation, the weight loss is discussed in relation to the bulk density and whether a purification process was included during the graphite production. At 550 °C, oxidation even occurred inside the block and was markedly accelerated by the presence of metallic impurities, leaving small etch pits with a round cross-section. Weight loss on graphite products without a purification process was 10∼100 times larger than that on products after purification. The weight loss at 1200 °C could be related to the bulk density for all graphite samples, with or without purification.
    View full abstract
    Download PDF (4366K)
  • Apparatus for measuring the relative electrical resistivity of graphite materials at high temperatures by direct heating
    Osamu Yoshimoto, Masaki Okada, Naoto Ohta
    Article type: Technical Report
    2015 Volume 2015 Issue 268 Pages 166-170
    Published: June 15, 2015
    Released on J-STAGE: July 15, 2015
    DOIhttps://doi.org/10.7209/tanso.2015.166
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A new direct heating apparatus was developed for measuring the relative electrical resistivity of graphite materials in the range from room temperature to 3000 °C. The temperature dependence of the relative resistivity of isotropic high-density graphite, extruded graphite and graphite sheets showed an initial decrease to a minimum at around 600 °C followed by a linear increase up to 3000 °C. The relative error of the resistivity ratio was determined to be 1.0% on average, and 3.1% at a maximum by using a standard graphite (RM8424) certificated by NIST. For a glass-like carbon, the relative resistivity decreased with increasing temperature up to 1500 °C.
    View full abstract
    Download PDF (1257K)
Recent Doctoral Thesis
  • Structural control of zeolite-templated carbon and its application to electrochemical energy storage
    Article type: Recent Doctoral Thesis
    2015 Volume 2015 Issue 268 Pages 173-174
    Published: June 15, 2015
    Released on J-STAGE: July 15, 2015
    DOIhttps://doi.org/10.7209/tanso.2015.173
    JOURNAL RESTRICTED ACCESS
    Show abstractHide abstract
    In this thesis, zeolite-templated carbon (ZTC), which is a high-surface microporous carbon, is chosen as a starting material and its structural control to achieve high performance electrochemical capacitors (ECs) is investigated. ZTC is synthesized as a negative replica of zeolite Y template, and has an interesting carbon framework, i.e. buckybowl-like framework structure, containing a lot of edge sites. Two different approaches were examined on the structure modification of ZTC to realize a high-performance electrode material for ECs. The first approach, decreasing the edge sites of ZTC, was found not to be effective way. However, the resulting material, i.e., crosslinked-fullerene-like framework structure, is a new class of sp2-carbon based material, which is expected to future researches. The second approach, utilization of the large amount of reactive edge site, was revealed to be an interesting way to enhance the capacitance from a contribution of electrochemically-introduced functional group.
    View full abstract
    Download PDF (217K)
Report
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top