Spatially-resolved current and impedance analysis of a stirred tank reactor and serpentine fuel cell flow-field at low relative humidity

Warren H.J. Hogarth; Johannes Steiner; Jay Burton Benziger; Alex Hakenjos

doi:10.1016/j.jpowsour.2006.10.103

Spatially-resolved current and impedance analysis of a stirred tank reactor and serpentine fuel cell flow-field at low relative humidity

Warren H.J. Hogarth, Johannes Steiner, Jay Burton Benziger, Alex Hakenjos

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

A 20 cm² segmented anode fuel cell is used to investigate the performance of a hydrogen-air fuel cell at 1 atm. with two different flow-fields using spatially-resolved current and impedance measurements. A self-draining stirred tank reactor (STR) fuel cell and a single-channel serpentine fuel cell are compared with humidified and dry feed conditions. The current density distribution, impedance distribution, heat distribution and water evolution are compared for the two different flow-fields. With inlet feed dew points of 30 °C, the STR fuel cell and serpentine system performed comparably with moderate current gradients. With drier feeds, however, the STR fuel cell exhibited superior overall performance in terms of a higher total current and lower current, impedance and temperature distribution gradients. The STR fuel cell design is superior to a single-channel serpentine design under dry conditions because its open channel design allows the feed gases to mix with the product water and auto-humidify the cell.

Original language	English (US)
Pages (from-to)	464-471
Number of pages	8
Journal	Journal of Power Sources
Volume	164
Issue number	2
DOIs	https://doi.org/10.1016/j.jpowsour.2006.10.103
State	Published - Feb 10 2007

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

Keywords

Auto-humidification
Current density distribution
Impedance
Single-channel serpentine design
Spatially-resolved impedance
Stirred tank reactor fuel cell

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10.1016/j.jpowsour.2006.10.103

Cite this

@article{c0132917d45c4b42bd26ad447ee13b79,

title = "Spatially-resolved current and impedance analysis of a stirred tank reactor and serpentine fuel cell flow-field at low relative humidity",

abstract = "A 20 cm2 segmented anode fuel cell is used to investigate the performance of a hydrogen-air fuel cell at 1 atm. with two different flow-fields using spatially-resolved current and impedance measurements. A self-draining stirred tank reactor (STR) fuel cell and a single-channel serpentine fuel cell are compared with humidified and dry feed conditions. The current density distribution, impedance distribution, heat distribution and water evolution are compared for the two different flow-fields. With inlet feed dew points of 30 °C, the STR fuel cell and serpentine system performed comparably with moderate current gradients. With drier feeds, however, the STR fuel cell exhibited superior overall performance in terms of a higher total current and lower current, impedance and temperature distribution gradients. The STR fuel cell design is superior to a single-channel serpentine design under dry conditions because its open channel design allows the feed gases to mix with the product water and auto-humidify the cell.",

keywords = "Auto-humidification, Current density distribution, Impedance, Single-channel serpentine design, Spatially-resolved impedance, Stirred tank reactor fuel cell",

author = "Hogarth, {Warren H.J.} and Johannes Steiner and Benziger, {Jay Burton} and Alex Hakenjos",

note = "Funding Information: WH acknowledges funding from the ARC Centre for Functional Nanomaterials.",

year = "2007",

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doi = "10.1016/j.jpowsour.2006.10.103",

language = "English (US)",

volume = "164",

pages = "464--471",

journal = "Journal of Power Sources",

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T1 - Spatially-resolved current and impedance analysis of a stirred tank reactor and serpentine fuel cell flow-field at low relative humidity

AU - Hogarth, Warren H.J.

AU - Steiner, Johannes

AU - Benziger, Jay Burton

AU - Hakenjos, Alex

N1 - Funding Information: WH acknowledges funding from the ARC Centre for Functional Nanomaterials.

PY - 2007/2/10

Y1 - 2007/2/10

N2 - A 20 cm2 segmented anode fuel cell is used to investigate the performance of a hydrogen-air fuel cell at 1 atm. with two different flow-fields using spatially-resolved current and impedance measurements. A self-draining stirred tank reactor (STR) fuel cell and a single-channel serpentine fuel cell are compared with humidified and dry feed conditions. The current density distribution, impedance distribution, heat distribution and water evolution are compared for the two different flow-fields. With inlet feed dew points of 30 °C, the STR fuel cell and serpentine system performed comparably with moderate current gradients. With drier feeds, however, the STR fuel cell exhibited superior overall performance in terms of a higher total current and lower current, impedance and temperature distribution gradients. The STR fuel cell design is superior to a single-channel serpentine design under dry conditions because its open channel design allows the feed gases to mix with the product water and auto-humidify the cell.

AB - A 20 cm2 segmented anode fuel cell is used to investigate the performance of a hydrogen-air fuel cell at 1 atm. with two different flow-fields using spatially-resolved current and impedance measurements. A self-draining stirred tank reactor (STR) fuel cell and a single-channel serpentine fuel cell are compared with humidified and dry feed conditions. The current density distribution, impedance distribution, heat distribution and water evolution are compared for the two different flow-fields. With inlet feed dew points of 30 °C, the STR fuel cell and serpentine system performed comparably with moderate current gradients. With drier feeds, however, the STR fuel cell exhibited superior overall performance in terms of a higher total current and lower current, impedance and temperature distribution gradients. The STR fuel cell design is superior to a single-channel serpentine design under dry conditions because its open channel design allows the feed gases to mix with the product water and auto-humidify the cell.

KW - Auto-humidification

KW - Current density distribution

KW - Impedance

KW - Single-channel serpentine design

KW - Spatially-resolved impedance

KW - Stirred tank reactor fuel cell

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JF - Journal of Power Sources

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ER -

Spatially-resolved current and impedance analysis of a stirred tank reactor and serpentine fuel cell flow-field at low relative humidity

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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