Anodic Reaction of Vapor Feed Direct Methanol Fuel Cell.

Fukunaga, Hiroshi; Teranishi, Nozomu; Yamada, Kôichi

doi:10.1252/kakoronbunshu.29.179

Cited by 2 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is obvious that R LF2 represents the electrooxidation reaction of the anode, since it decreased as the polarization increased. In our previous study using a simpler equivalent circuit (4,5), this dependence was clearly observed in the low polarization range but the dependence became weak in the high polarization range. Moreover, R LF simulated by the conventional equivalent circuit also showed a similar dependence as shown in Fig.…”

Section: Resultsmentioning

confidence: 72%

“…One of the main areas of study is the development of a high performance anode. To investigate the reaction at the DMFC anode, several studies have employed electrochemical impedance spectroscopy (EIS) (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11), since it can separate various elementary steps with different time constants. In most of the studies that simulated the DMFC anode reaction with EIS, the measurement was carried out either using a half-MEA configuration, which has no cathode on the membrane electrode assembly (MEA), or using a dynamic hydrogen electrode (DHE), which is obtained by supplying hydrogen to the cathode.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of the Microstructure and the Elementary Steps from the Impedance of DMFC Anode

et al. 2008

Self Cite

View full text Add to dashboard Cite

The microstructure and the elementary steps of the direct methanol fuel cell (DMFC) anode are investigated using an advanced equivalent circuit. A serial circuit of two parallel circuits of resistance and capacitance, which is in parallel with a Faradaic impedance, is introduced to simulate the anodic reaction. Three processes with different anode polarization dependencies are clearly reproduced by the simulation using this equivalent circuit, and they are considered to be interfacial resistance representing the transport of ions through the electrode pores, electrooxidation reaction of the anode, and another process parallel to the reaction intermediate. The anode polarization dependence of the interfacial resistance and the change in the distortion was better explained by the modified equivalent circuit than by the conventional equivalent circuit using a constant phase element (CPE) with unfixed exponent. The relationship of the interfacial resistance with catalyst loading or electrode thickness was clarified using this equivalent circuit.

show abstract

Section: Resultsmentioning

confidence: 72%