Porosity and Pt content in the catalyst layer of PEMFC: Effects on diffusion and polarization characteristics

Ai Suzuki; Tatsuya Hattori; Ryuji Miura; Hideyuki Tsuboi; Nozomu Hatakeyama; Hiromitsu Takaba; Mark C. Williams; Akira Miyamoto

Porosity and Pt content in the catalyst layer of PEMFC: Effects on diffusion and polarization characteristics

Ai Suzuki, Tatsuya Hattori, Ryuji Miura, Hideyuki Tsuboi, Nozomu Hatakeyama, Hiromitsu Takaba, Mark C. Williams, Akira Miyamoto

未来科学技術共同研究センター

研究成果: Article › 査読

19 被引用数 (Scopus)

抄録

A three-dimensional (3-D) pore network model of polymer electrolyte membrane fuel cell (PEMFC) is presented in order to evaluate the effect of pore size and the effective diffusion coefficient in random porous media. The model of pseudo cathode catalyst layer (CCL) consists of pores and a random distribution of carbon supported platinum (Pt/C) and electrolytes, which were generated on a computer by means of Monte Carlo method. In this study, we utilized this 3-D meso-scale porous model of the CCL, and investigated tortuosity of pores, electrolyte connectivity. The effective Knudsen diffusion coefficient can be successfully obtained. This meso-scale model is applied to study the effects of porosity, pore size and Pt content on the polarization characteristics of the PEMFC. The relation between the composition of the CCL and the characteristics of polarization curve has been clarified.

本文言語	English
ページ（範囲）	1948-1961
ページ数	14
ジャーナル	International Journal of Electrochemical Science
巻	5
号	12
出版ステータス	Published - 2010 12月 1

ASJC Scopus subject areas

電気化学

他のファイルとリンク

引用スタイル

@article{90503c7258f94fd898fb178d0223e48a,

title = "Porosity and Pt content in the catalyst layer of PEMFC: Effects on diffusion and polarization characteristics",

abstract = "A three-dimensional (3-D) pore network model of polymer electrolyte membrane fuel cell (PEMFC) is presented in order to evaluate the effect of pore size and the effective diffusion coefficient in random porous media. The model of pseudo cathode catalyst layer (CCL) consists of pores and a random distribution of carbon supported platinum (Pt/C) and electrolytes, which were generated on a computer by means of Monte Carlo method. In this study, we utilized this 3-D meso-scale porous model of the CCL, and investigated tortuosity of pores, electrolyte connectivity. The effective Knudsen diffusion coefficient can be successfully obtained. This meso-scale model is applied to study the effects of porosity, pore size and Pt content on the polarization characteristics of the PEMFC. The relation between the composition of the CCL and the characteristics of polarization curve has been clarified.",

keywords = "3-D, Catalyst layer, Effective diffusion coefficient, Electrolytes, Knudsen diffusion, Pore network, Pt/C, Tortuosity",

author = "Ai Suzuki and Tatsuya Hattori and Ryuji Miura and Hideyuki Tsuboi and Nozomu Hatakeyama and Hiromitsu Takaba and Williams, {Mark C.} and Akira Miyamoto",

year = "2010",

month = dec,

day = "1",

language = "English",

volume = "5",

pages = "1948--1961",

journal = "International Journal of Electrochemical Science",

issn = "1452-3981",

publisher = "Electrochemical Science Group",

number = "12",

}

TY - JOUR

T1 - Porosity and Pt content in the catalyst layer of PEMFC

T2 - Effects on diffusion and polarization characteristics

AU - Suzuki, Ai

AU - Hattori, Tatsuya

AU - Miura, Ryuji

AU - Tsuboi, Hideyuki

AU - Hatakeyama, Nozomu

AU - Takaba, Hiromitsu

AU - Williams, Mark C.

AU - Miyamoto, Akira

PY - 2010/12/1

Y1 - 2010/12/1

N2 - A three-dimensional (3-D) pore network model of polymer electrolyte membrane fuel cell (PEMFC) is presented in order to evaluate the effect of pore size and the effective diffusion coefficient in random porous media. The model of pseudo cathode catalyst layer (CCL) consists of pores and a random distribution of carbon supported platinum (Pt/C) and electrolytes, which were generated on a computer by means of Monte Carlo method. In this study, we utilized this 3-D meso-scale porous model of the CCL, and investigated tortuosity of pores, electrolyte connectivity. The effective Knudsen diffusion coefficient can be successfully obtained. This meso-scale model is applied to study the effects of porosity, pore size and Pt content on the polarization characteristics of the PEMFC. The relation between the composition of the CCL and the characteristics of polarization curve has been clarified.

AB - A three-dimensional (3-D) pore network model of polymer electrolyte membrane fuel cell (PEMFC) is presented in order to evaluate the effect of pore size and the effective diffusion coefficient in random porous media. The model of pseudo cathode catalyst layer (CCL) consists of pores and a random distribution of carbon supported platinum (Pt/C) and electrolytes, which were generated on a computer by means of Monte Carlo method. In this study, we utilized this 3-D meso-scale porous model of the CCL, and investigated tortuosity of pores, electrolyte connectivity. The effective Knudsen diffusion coefficient can be successfully obtained. This meso-scale model is applied to study the effects of porosity, pore size and Pt content on the polarization characteristics of the PEMFC. The relation between the composition of the CCL and the characteristics of polarization curve has been clarified.

KW - 3-D

KW - Catalyst layer

KW - Effective diffusion coefficient

KW - Electrolytes

KW - Knudsen diffusion

KW - Pore network

KW - Pt/C

KW - Tortuosity

UR - http://www.scopus.com/inward/record.url?scp=78649912207&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78649912207&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:78649912207

VL - 5

SP - 1948

EP - 1961

JO - International Journal of Electrochemical Science

JF - International Journal of Electrochemical Science

SN - 1452-3981

IS - 12

ER -

Porosity and Pt content in the catalyst layer of PEMFC: Effects on diffusion and polarization characteristics

抄録

ASJC Scopus subject areas

他のファイルとリンク

フィンガープリント

引用スタイル