Progress in the US DOE fuel cell subprogram efforts in polymer electrolyte fuel cells

Marcinkoski, Jason; Kopasz, John P.; Benjamin, T.G.

doi:10.1016/j.ijhydene.2007.12.068

Cited by 87 publications

(60 citation statements)

References 5 publications

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“…Fuel-cell stacks must be replaced 4-5 times during the lifetime of current generations of vehicle. It is thus the cost of 4-5 fuel-cell units that must be compared with alternative ICEs (Marcinkoski et al, 2008;Sorensen, 2007).…”

Section: Fuel Cellsmentioning

confidence: 99%

The Challenge of Bioenergies: An Overview

Carels¹

2011

Biofuel's Engineering Process Technology

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Section: Fuel Cellsmentioning

confidence: 99%

The Challenge of Bioenergies: An Overview

Carels¹

2011

Biofuel's Engineering Process Technology

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“…The polymer electrolyte membrane fuel cell (PEMFCs) exhibits the most promising alternative source of energy for a variety of portable electronic devices, stationary and vehicle applications [3,4]. To generate useful current and voltage, individual single fuel cells are connected in series to form stack of cells.…”

Section: Introductionmentioning

confidence: 99%

CNTs nanostructuring effect on the properties of graphite composite bipolar plate

Dhakate

Sharma

Chauhan

et al. 2010

International Journal of Hydrogen Energy

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Intent of present investigation is to improve the properties of graphite-polymer composite bipolar plate by nanostructuring. This involves the incorporation of different vol.% of multiwall carbon nanotubes (MWNTs) in graphite-polymer composite bipolar plate. It has been found that by inclusion of 1 vol.% of MWNTs in graphite composite plate, the electrical and thermal conductivity of nanocomposite increased by 100%. The thermal conductivity of nanocomposite plate increases from 1 W/m K to 13 W/m K in throughplane and in-plane from 25 W/m K to 50 W/m K at 1 vol.% of MWNTs. This significant enhancement is due to the orientation of MWNTs in all the directions of composite, positive synergistic effect of MWNTs and heat transfer along the axis directions. However, bending strength of nanocomposite increases by 25% and maximum augmentation is in case of 1 vol. % of MWNTs. The improvement in conductivity of nanocomposite plate is due to an increase in the electron transfer ability within the composite plate which influences the I-V performance of ultimate fuel cell. These observations confirm that the optimal content of MWNTs is 1 vol.%, in graphite-polymer composite.

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“…Figure 2 shows the polarization curves of the MEAs at 60 C operations (RH 16 %). The open circuit voltages (OCVs), power densities at 500 mA/cm 2 and maximum are summarized in Table 2. The MEAs based on the thinner PEM among the S-RX 73 to S-RX 18, showed better performance in terms of power densities, and improved at the higher current density range, where diffusion polarization affected on the polarization curve.…”

Section: Resultsmentioning

confidence: 99%

“…The cost of proton exchange membrane (PEM) is estimated as 6% of the PEFC total cost [2]. Nafion ® (DuPont Co., Ltd.) is known as the good PEM for the PEFC utilization, but it has high cost.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of PEFC Membrane based on Cross-linked PTFE by EB Grafting: Effect of Thickness for FC Performance

Hiraiwa

Yoshikawa

Oshima

et al. 2012

J. Photopol. Sci. Technol.

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The performance of a polymer electrolyte fuel cell (PEFC) was affected by the thickness of the thin proton exchange membrane (PEM). The PEMs with the different thickness were prepared by radiation induced grafting of styrene into the radiation-cross-linked polytetrafluoroethylene (RX-PTFE) membrane prepared from PTFE dispersion, and then sulfonated. The wet thicknesses of the obtained thin PEMs were lower than 25 µm. A PEM based on a 50 µm PTFE film, with the wet thickness of 73 µm, was also prepared under the same procedure for the comparison. The obtained PEMs were characterized in term of gas cross-over. The surface of platinum / carbon electrodes was coated with Nafion ® dispersion, and then membrane electrode assembles (MEAs) were prepared by the hot-pressing. The polarization curves and electrochemical impedances of the thin PEMs in a single fuel cell were analyzed. As a result, the cell performance of the MEA based on thinner PEM tended to give higher power density and current density. On the other hand, the performance of the thinnest PEM (13 m) decreased, and the MEA based on the thinner PEM gave the lower open circuit voltage (OCV) due to the higher gas cross-over. Thus, the thin PEM based on RX-PTFE had shown a high performance at the suitable thickness.

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Progress in the US DOE fuel cell subprogram efforts in polymer electrolyte fuel cells

Cited by 87 publications

References 5 publications

The Challenge of Bioenergies: An Overview

The Challenge of Bioenergies: An Overview

CNTs nanostructuring effect on the properties of graphite composite bipolar plate

Evaluation of PEFC Membrane based on Cross-linked PTFE by EB Grafting: Effect of Thickness for FC Performance

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