Preparation of Arc Black and Carbon Nano Balloon by Arc Discharge and Their Application to a Fuel Cell

Abstract

Ba(Zr 0.2 Ti 0.8 )O 3 (BZT) and 2 mol% Mn additional doped BZT (Mn-BZT) thin films were deposited on Pt/Ti/SiO 2 /Si by the pulsed laser deposition (PLD) technique under the same growth conditions. X-ray diffraction scans showed that both films were polycrystalline and preferentially (1 1 1)-oriented, and an enhanced crystallization effect was obtained after Mn doping. The parallel-plate capacitors of Au/BZT/Pt and Au/Mn-BZT/Pt were prepared to investigate the electric properties, respectively. The remanent polarization and the coercive electric field for Mn-doped BZT film were both smaller than those of undoped BZT film. Furthermore, Mn-doped BZT film exhibited a higher dielectric constant of 460 at zero bias, larger dielectric tunability of 69.0% and lower dielectric loss of 5.0‰ under an applied electric field of 615 kV cm −1 than those of undoped BZT film. The figure of merit for preferentially (1 1 1)-oriented BZT thin film was greatly enhanced from 94 to 138 by Mn doping. The enhanced dielectric behaviour by Mn doping could be mainly attributed to the decrease in electron concentration and oxygen vacancies and the reorientation of the defect complex.

Effective Utilization of Carbon Nanocoil-supported PtRu Anode Catalyst by Applying Anode Microporous Layer for Improved Direct Methanol Fuel Cell Performance

“…24 The discharge chamber consisted of two graphite rod electrodes mounted at 80°C in an 80-kPa N 2 atmosphere, which generated arc discharge with an AC current of 200 A. The N 2 gas flow rate was maintained as 20 L min…”

Manufacturing of Electric Double-layer Capacitors using Carbon Nanocoils and Evaluation of their Specific Capacitance at a High Scan Rate

“…AcB was synthesized by using the twin‐torch arc discharge apparatus developed in our laboratory . In the discharge chamber, an arc discharge with an AC current of 200 A occurred between the two graphite rod electrodes in an 80‐kPa N 2 gas atmosphere.…”

“…CCVD is a method to segregate carbon on the catalyst surface by supplying hydrocarbon feedstock gas. As a comparison of CNC, AC (YP‐80F, Kuraray Co., Ltd., Tokyo, Japan) and arc black (AcB) which was synthesized by an arc discharge in our laboratory were used. AcB is a particulate carbon nanomaterial and has a larger surface area than CNCs.…”

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

“…Moreover, thermogravimetric/differential thermal analysis (TGA/ DTA; Shimadzu DTG-60/60H) and laser Raman spectroscopy (JASCO NRS-1000, excitation wavelength: 532 nm) were used to evaluate the crystallization of the carbon nanomaterials. [17][18][19][20]…”