AC impedance technique in PEM fuel cell diagnosis—A review

Yuan, Xiao‐Zi; Wang, Haijiang; Sun, Jian; Zhang, Jiujun

doi:10.1016/j.ijhydene.2007.05.036

Cited by 631 publications

(369 citation statements)

References 84 publications

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“…The high frequency intercepting with the real axis R U of the cell using MEA-7800, which represents the total ohmic resistance after running 7800 h, is bigger than that of MEA-0 and MEA-7800 Renewed. Moreover, the arc diameter of the cell using MEA-7800 represents charge transfer resistance R ct [18], which is also bigger than that of MEA-0 and MEA-7800 Renewed. The R U and R ct can be obtained through simulation with R U (R 1 Q 1 ) (R ct Q dl ) equivalent circuit [19] and listed in Table 1.…”

Section: Electrochemical Impedance Spectrum (Eis) Analysismentioning

confidence: 97%

Investigations on degradation of the long-term proton exchange membrane water electrolysis stack

Sun

Shao

et al. 2014

Journal of Power Sources

167

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Section: Electrochemical Impedance Spectrum (Eis) Analysismentioning

confidence: 97%

Investigations on degradation of the long-term proton exchange membrane water electrolysis stack

Sun

Shao

et al. 2014

Journal of Power Sources

167

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“…On the other hand, since the cathode is fed with pure O 2 , R mass is dominated by methanol transport occurring at the anode side. L represents the inductive contributions and CPE is a constant phase element which replaces the conventional doublelayer capacitance [58][59][60][61]. In the 70-110 °C range, R ele was found to be weakly dependent on temperature for all samples; moreover, the differences in R ele values of the three MEAs were not large enough to account for the different electrochemical performance showed in Figure 6.…”

Section: Conductivitymentioning

confidence: 99%

Development of Nafion/Tin Oxide Composite MEA for DMFC Applications

et al. 2010

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Wiley-VCH AbstractNafion composite membranes containing either hydrated tin oxide (SnO 2 ·nH 2 O) or sulfated tin oxide (SSnO 2 ) at 5 wt.% and 10 wt.% were prepared and characterized. The structural and electrochemical features of the samples were investigated using X-ray diffraction, electrochemical impedance spectroscopy, methanol crossover, and direct methanol fuel cell (DMFC) tests. Highest conductivity values were obtained by using S-SnO 2 as filler (0.094 Scm -1 at T=110°C and RH=100%). The presence of the inorganic compound resulted in lower methanol crossover and improved DMFC performance with respect to a reference unfilled membrane. To improve the interface of the membrane electrode assembly (MEA), a layer of the composite electrolyte (i.e., the Nafion membrane containing 5 wt% S-SnO 2 ) was brushed on the electrodes, obtaining a DMFC operating at 110°C with a power density (PD) of 100 mWcm -2 which corresponds to a PD improvement of 52% with respect to the unfilled Nafion membrane.

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“…And comparison of the catalyst performance between these two ligands is one of the objects in my thesis. Durability of the Pt/MWCNTs was evaluated by using potential cyclic voltammetry (CV) of the MEAs by cycling between 0.15 and 1.2 V to accelerate the electrochemically active surface area (ESA) loss of the Pt [29]. In this research, Pt/MWCNTs prepared with ALS and commercial catalyst were operated at ambient temperature with H 2 /N 2 , 10 mV/s scan rate.…”

Section: Surface Modification Of Mwcntsmentioning

confidence: 99%