Model study on the stability of carbon support materials under polymer electrolyte fuel cell cathode operation conditions

Colmenares, Luis C.; Wurth, A.; Jusys, Z.; Behm, R. Jürgen

doi:10.1016/j.jpowsour.2009.01.078

Cited by 81 publications

(80 citation statements)

References 56 publications

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“…6 The Z oxide is necessary to explain the carbon dioxide behavior of graphitized carbons. 11 A numerical model has been recently published by our group to provide a tool for predicting the oxide concentrations, time decay, and carbon dioxide production as a function of time, potential, and temperature. 48 Performance decay in electrochemical systems.-The electrochemical oxidation of carbon catalyst supports results in performance loss in the porous electrodes of electrochemical systems.…”

Section: Discussionmentioning

confidence: 99%

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The Role of Nanostructure in the Electrochemical Oxidation of Model-Carbon Materials in Acidic Environments

Gallagher¹,

Yushin

Fuller

2010

J. Electrochem. Soc.

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Carbon is ubiquitous in electrochemical energy devices and may exist in varied forms ranging from crystalline or amorphous to novel nanostructures based on a few sheets of graphene. The electrochemical oxidation of carbon results in the performance degradation of the electrochemical device. A study on the structure-reactivity relationship of the electrochemical oxidation of graphene-based carbon materials ͑carbon black, carbon onions, multiwalled nanotubes, and exfoliated graphite platelets͒ is presented. High resolution transmission electron microscopy, X-ray diffraction, elemental analysis, and N 2 adsorption were used to characterize the materials tested. Both liquid half-cell tests and proton exchange membrane fuel cell tests with inline carbon dioxide analysis were used to study the electrochemical behavior. The electrochemical oxidation of 10 seemingly disparate carbon materials was separated into two distinct mechanisms. Both mechanisms approach an 80% current efficiency for carbon dioxide formation. Iron and sulfur impurities are insignificant controlling factors. The difference between the two mechanisms is tentatively attributed to the degree of interlayer interaction between graphene sheets.

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Section: Discussionmentioning

confidence: 99%

“…This was also observed for a graphitized carbon that was chemically oxidized before electrochemical testing. 11 The current decay at long times is suggested to result from the continued growth of a passive surface oxide. Figure 11.…”

Section: Journal Of the Electrochemical Society 157 ͑6͒ B820-b830 ͑2mentioning

confidence: 99%

The Role of Nanostructure in the Electrochemical Oxidation of Model-Carbon Materials in Acidic Environments

Gallagher¹,

Yushin

Fuller

2010

J. Electrochem. Soc.

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“…However, the above-mentioned graphite materials lack enough flexibility and electrochemical stability. It is reported that a flexible pyrolytic polyimide graphite film (PGF) possesses a highly in-plane oriented structure, which endows the PGF with an excellent electrochemical corrosion resistance [16,17]. The PGF are also mechanically strong and flexible and therefore, could facilitate the cell fabrication.…”

Section: Introductionmentioning

confidence: 99%

Anticorrosive flexible pyrolytic polyimide graphite film as a cathode current collector in lithium bis(trifluoromethane sulfonyl) imide electrolyte

Han

Zhang

Huang

et al. 2014

Electrochemistry Communications

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a b s t r a c t a r t i c l e i n f oFlexible pyrolytic polyimide graphite film (PGF) is explored as a cathode current collector in lithium ion batteries using lithium bis(trifluoromethane sulfonyl) imide (LiTFSI) based electrolyte. It is demonstrated that no obvious anodic current is observed up to 4.5 V versus Li + /Li for PGF, while significant corrosion current is found from 3.6 V for aluminum, indicative of better electrochemical stability of PGF than that of aluminum in LiTFSI based electrolyte. LiMn 2 O 4 on aluminum and PGF has been used as model electrode for testing. There is hardly any capacity retained after 10 cycles at room temperature for the LiMn 2 O 4 /aluminum electrode. With regard to the LiMn 2 O 4 /PGF electrode, the capacity retention ratio remained 89% after 1000 cycles. Moreover, at an elevated temperature of 55°C, the capacity retention ratio kept at 81% after 300 cycles. Since LiTFSI-based electrolyte shows advantages in safety, stability and conductivity but could not be used due to Al-corrosion, the application of the PGF current collector could overcome this barrier.

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“…Various aspects were investigated and discussed, namely the influence of the temperature [3,4,11,17,18], the electrode potential [3,13], the presence of water and the electrolyte concentration [4,13,19], the structure and pretreatment of carbon materials [12,20,21], and the catalytic effect of Pt [8,9,12,16,22]. However, to the best of our knowledge, the effect of Nafion Ò on the carbon corrosion has not been investigated yet.…”

Section: Introductionmentioning

confidence: 99%

Influence of Nafion® ionomer on carbon corrosion

et al. 2010

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Corrosion of the three carbon black materials which differ in their textural, sub-structural, and morphological characteristics is studied in H 2 SO 4 electrolyte at 80°C at positive polarization. Impregnation of carbon blacks with Nafion Ò ionomer is found to strongly affect their susceptibility to corrosion, which varies non-monotonically as a function of the Nafion Ò loading. Low temperature nitrogen adsorption is applied to study the distribution of the ionomer molecules in the carbon matrix.

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Model study on the stability of carbon support materials under polymer electrolyte fuel cell cathode operation conditions

Cited by 81 publications

References 56 publications

The Role of Nanostructure in the Electrochemical Oxidation of Model-Carbon Materials in Acidic Environments

The Role of Nanostructure in the Electrochemical Oxidation of Model-Carbon Materials in Acidic Environments

Anticorrosive flexible pyrolytic polyimide graphite film as a cathode current collector in lithium bis(trifluoromethane sulfonyl) imide electrolyte

Influence of Nafion® ionomer on carbon corrosion

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