...Tsukasa Nagai; Naoko Fujiwara; Mitsunori Kitta; Masafumi Asahi; Shin-ichi Yamazaki; Zyun Siroma; Tsutomu Ioroi References [1] Savy , M. , 1968 , “ Oxygen Reduction in Alkaline Solution on Semiconducting Cobalt Oxide Electrodes ,” Electrochim. Acta , 3 ( 6 ), pp. 1359 – 1376 . 10.1016...

... structure in the temperature range up to 1273 K. The oxide-ion conductivities of the present systems were discussed on a basis of ordering of oxygen vacancy in the pyrochlore-type structure. Theoxide-ion conduction of Eu 2 Zr 2 O 7 was ascribed to diffusion of oxygen along the 〈 100 〉 direction, while...

... design, liquid water is stored internally to the fuel cell within graphite bipolar plates while hydrogen and oxygen gases, electrolyzed from water, are stored in containers external to the fuel cell. A spraying technique is used to produce a functional membrane electrode assembly. Catalyst ink...

...B. A. Haberman; J. B. Young A typical integrated-planar solid oxide fuel cell (IP-SOFC) consists of modules with series connected electrochemical cells printed on their outer surfaces. Oxygen is supplied to the cathodes from air flowing over the outside of the module and hydrogen diffuses from...

...Shin’ya Obara The capacity reduction of a solid-polymer-membrane-type fuel cell (PEFC) with a reformer by load leveling and by improving the efficiency of part-load operation of the reformer is considered. The power generation efficiency of a fuel cell improves by supplying gas with a high oxygen...

... area (ESA) was made using cyclic voltammetry measurements in H 2 S O 4 or H Cl O 4 at room temperature and scanning rates of 20 and 100 mV ∕ s . Oxygen reduction activity for aerogel-supported and carbon-supported Pt catalysts was evaluated at various rotation speeds in the range of 0 - 2500 rpm...

...B. A. Haberman; J. B. Young The Rolls-Royce integrated-planar solid oxide fuel cell (IP-SOFC) consists of ceramic modules with electrochemical cells printed on the outer surfaces. The cathodes are supplied with oxygen from air flowing over the outside of the module and the anodes are supplied...

...Hitoshi Takamura; Yusuke Aizumi; Atsunori Kamegawa; Masuo Okada Oxygen permeable ceramics based on mixed conductors are attracting much attention for use in partial oxidation of hydrocarbons as a novel technique for syngas and pure hydrogen production. This paper describes the preparation...

...Maohai Wang; Hang Guo; Chongfang Ma The detailed dynamic characteristics of direct methanol fuel cells need to be known if they are used for transportable power sources. The dynamic response of a direct methanol fuel cell to variable loading conditions, the effect of cell temperature and oxygen...

..., which is made of yttria-stabilized zirconia. The influences of Y 2 O 3 concentration and various operation temperatures on the SOFC were studied. Simulation results show that there exists an optimal concentration of 8 mol % of Y 2 O 3 in the composition for oxygen transport. Also higher operation...

...Yongming Lin; Steven B. Beale Transport phenomena play an important role in the performance of the proton exchange membrane fuel cell. Water generated by electrochemical reactions and transported by osmotic drag and back diffusion can cause saturation or flooding, preventing oxygen from reaching...

..., and it accounts for the oxygen ion concentration at these interfaces. The model also considers the Gibbs free energy for the two electrode interfaces seperately. Results from case studies demonstrate the great potential of the proposed model Influence of oxide ion concentration on V-I plots at T = 973...

...P. Berg; K. Promislow; J. Stumper; B. Wetton We present a transient model for an electrically segmented polymer electrolyte membrane (PEM) fuel cell which is run until extinction from a finite oxygen supply. The experimental cell is divided into 16 electrically isolated pucks which are fed oxygen...

...M. Dhallu; J. A. Kilner To date, a number of ceramic oxides with the perovskite structure have been proposed as membrane materials for the selective separation of oxygen and the partial oxidation of hydrocarbons due to their high oxygen permeation fluxes. In contrast, their instability under...