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Influence of Methanol Crossover on the Fuel Utilization of Passive Direct Methanol Fuel Cell
Author(s) -
Lai Q.Z.,
Yin G.P.,
Wang Z.B.,
Du C.Y.,
Zuo P.J.,
Cheng X.Q.
Publication year - 2008
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.200700066
Subject(s) - methanol , direct methanol fuel cell , faraday efficiency , diffusion , chemistry , current density , methanol fuel , analytical chemistry (journal) , materials science , chemical engineering , chromatography , electrochemistry , thermodynamics , organic chemistry , electrode , physics , quantum mechanics , anode , engineering
The effect of methanol crossover on the fuel utilization of a passive direct methanol fuel cell (DMFC) was reported. The results revealed that the Faradaic efficiency decreased from 46.9 to 17.4% when methanol concentration increased from 1.0 to 8.0 mol L –1 at the lower current density 11.1 mA cm –2 . However, the Faradaic efficiency increased from 14.7 to 31.3% when methanol concentration increased from 1.0 to 8.0 mol L –1 at a higher current density of 44.4 mA cm –2 . On the other hand, although the amount of methanol was increased, the Faradaic efficiency did not change, obviously due to the uniform methanol crossover and methanol diffusion at the same methanol concentration and constant current.