Elucidating differences between carbon paper and carbon cloth in polymer electrolyte fuel cells

Yun Wang, Chao-yang Wang, K. S. Chen

Research output: Contribution to journalArticle

129 Citations (Scopus)

Abstract

This paper seeks to develop a structure-performance relationship for gas diffusion layers (GDLs) of polymer electrolyte fuel cells (PEFCs), and hence to explain the performance differences between carbon paper (CP) and carbon cloth (CC). Three-dimensional simulations, based on a two-phase model with GDL structural information taken into account, are carried out to explore the fundamentals behind experimentally observed performance differences of the two carbon substrates, i.e. CC and CP, under low- and high-humidity operations. Validation against polarization data is made under both operating conditions, and the results indicate that the CC is the better choice as a GDL material at high-humidity operations due to its low tortuosity of the pore structure and its rough textural surface facilitating droplet detachment. However, under dry conditions, the CP shows better performance due to its more tortuous structure, which prevents the loss of product water to dry gas streams, thus increasing the membrane hydration level and reducing the ohmic loss. The present work is one step toward developing a science-based framework for selection of materials for next-generation, high-performance gas diffusion media.

Original languageEnglish (US)
Pages (from-to)3965-3975
Number of pages11
JournalElectrochimica Acta
Volume52
Issue number12
DOIs
StatePublished - Mar 10 2007

Fingerprint

Electrolytes
Fuel cells
Polymers
Carbon
Diffusion in gases
Atmospheric humidity
Pore structure
Hydration
Gases
Polarization
Membranes
Water
Substrates

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

@article{e0475eed9b2847bdb87c3983b375f832,
title = "Elucidating differences between carbon paper and carbon cloth in polymer electrolyte fuel cells",
abstract = "This paper seeks to develop a structure-performance relationship for gas diffusion layers (GDLs) of polymer electrolyte fuel cells (PEFCs), and hence to explain the performance differences between carbon paper (CP) and carbon cloth (CC). Three-dimensional simulations, based on a two-phase model with GDL structural information taken into account, are carried out to explore the fundamentals behind experimentally observed performance differences of the two carbon substrates, i.e. CC and CP, under low- and high-humidity operations. Validation against polarization data is made under both operating conditions, and the results indicate that the CC is the better choice as a GDL material at high-humidity operations due to its low tortuosity of the pore structure and its rough textural surface facilitating droplet detachment. However, under dry conditions, the CP shows better performance due to its more tortuous structure, which prevents the loss of product water to dry gas streams, thus increasing the membrane hydration level and reducing the ohmic loss. The present work is one step toward developing a science-based framework for selection of materials for next-generation, high-performance gas diffusion media.",
author = "Yun Wang and Chao-yang Wang and Chen, {K. S.}",
year = "2007",
month = "3",
day = "10",
doi = "10.1016/j.electacta.2006.11.012",
language = "English (US)",
volume = "52",
pages = "3965--3975",
journal = "Electrochimica Acta",
issn = "0013-4686",
publisher = "Elsevier Limited",
number = "12",

}

Elucidating differences between carbon paper and carbon cloth in polymer electrolyte fuel cells. / Wang, Yun; Wang, Chao-yang; Chen, K. S.

In: Electrochimica Acta, Vol. 52, No. 12, 10.03.2007, p. 3965-3975.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Elucidating differences between carbon paper and carbon cloth in polymer electrolyte fuel cells

AU - Wang, Yun

AU - Wang, Chao-yang

AU - Chen, K. S.

PY - 2007/3/10

Y1 - 2007/3/10

N2 - This paper seeks to develop a structure-performance relationship for gas diffusion layers (GDLs) of polymer electrolyte fuel cells (PEFCs), and hence to explain the performance differences between carbon paper (CP) and carbon cloth (CC). Three-dimensional simulations, based on a two-phase model with GDL structural information taken into account, are carried out to explore the fundamentals behind experimentally observed performance differences of the two carbon substrates, i.e. CC and CP, under low- and high-humidity operations. Validation against polarization data is made under both operating conditions, and the results indicate that the CC is the better choice as a GDL material at high-humidity operations due to its low tortuosity of the pore structure and its rough textural surface facilitating droplet detachment. However, under dry conditions, the CP shows better performance due to its more tortuous structure, which prevents the loss of product water to dry gas streams, thus increasing the membrane hydration level and reducing the ohmic loss. The present work is one step toward developing a science-based framework for selection of materials for next-generation, high-performance gas diffusion media.

AB - This paper seeks to develop a structure-performance relationship for gas diffusion layers (GDLs) of polymer electrolyte fuel cells (PEFCs), and hence to explain the performance differences between carbon paper (CP) and carbon cloth (CC). Three-dimensional simulations, based on a two-phase model with GDL structural information taken into account, are carried out to explore the fundamentals behind experimentally observed performance differences of the two carbon substrates, i.e. CC and CP, under low- and high-humidity operations. Validation against polarization data is made under both operating conditions, and the results indicate that the CC is the better choice as a GDL material at high-humidity operations due to its low tortuosity of the pore structure and its rough textural surface facilitating droplet detachment. However, under dry conditions, the CP shows better performance due to its more tortuous structure, which prevents the loss of product water to dry gas streams, thus increasing the membrane hydration level and reducing the ohmic loss. The present work is one step toward developing a science-based framework for selection of materials for next-generation, high-performance gas diffusion media.

UR - http://www.scopus.com/inward/record.url?scp=33847328294&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33847328294&partnerID=8YFLogxK

U2 - 10.1016/j.electacta.2006.11.012

DO - 10.1016/j.electacta.2006.11.012

M3 - Article

AN - SCOPUS:33847328294

VL - 52

SP - 3965

EP - 3975

JO - Electrochimica Acta

JF - Electrochimica Acta

SN - 0013-4686

IS - 12

ER -