Surface Treatment of Pt Cathode Using Ceria Infiltration for High Performance Polymer Electrolyte Membrane Fuel Cells

Jae Hyeok Lee; Junmo Koo; Gwon Deok Han; Jun Woo Kim; Hyung Jong Choi; Joon Hyung Shim

doi:10.1007/s40684-020-00191-w

Surface Treatment of Pt Cathode Using Ceria Infiltration for High Performance Polymer Electrolyte Membrane Fuel Cells

Jae Hyeok Lee, Junmo Koo, Gwon Deok Han, Jun Woo Kim, Hyung Jong Choi, Joon Hyung Shim

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

6 Citations (Scopus)

Abstract

This study evaluates the performance and stability of Pt cathodes, which are treated by infiltrating cerium oxide (CeO_x) onto their surfaces, in polymer electrolyte membrane fuel cells. The concentration of CeO_x on the surface of Pt is adjusted by varying the concentration of the cerium precursor in the infiltration solution. The peak power density of the cell using the Pt cathode featuring the optimal amount of infiltrated CeO_x is as high as 400 mW cm⁻² at 70 °C, which is approximately 40% higher than that of the cell using the untreated Pt cathode under identical test conditions. Electrochemical impedance analysis confirms that this increase in peak power density is clearly attributed to the decrease in cathodic polarization impedance, which implies that the CeO_x deposited on the surface of Pt enhances the catalytic performance of Pt. The infiltration of CeO_x on the surface of Pt is also confirmed to be truly effective for improving the stability of Pt. Accelerated degradation tests demonstrate that the degradation rates of the cells using CeO_x-Pt cathodes are significantly lower than that of the cell using the untreated Pt cathode because of the preservation of electrochemically active sites, as revealed by cyclic voltammetry.

Original language	English
Pages (from-to)	509-518
Number of pages	10
Journal	International Journal of Precision Engineering and Manufacturing - Green Technology
Volume	8
Issue number	2
DOIs	https://doi.org/10.1007/s40684-020-00191-w
Publication status	Published - 2021 Mar

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (No. NRF-2019R1A2C2003054) and Korea Electric Power Corporation (Grant number: R17XA05-57).

Publisher Copyright:
© 2020, Korean Society for Precision Engineering.

Keywords

Cathode
Cerium oxide
Infiltration
Membrane-electrode assembly
Polymer electrolyte membrane fuel cell

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
General Materials Science
Mechanical Engineering
Industrial and Manufacturing Engineering
Management of Technology and Innovation

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/s40684-020-00191-w

Cite this

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title = "Surface Treatment of Pt Cathode Using Ceria Infiltration for High Performance Polymer Electrolyte Membrane Fuel Cells",

abstract = "This study evaluates the performance and stability of Pt cathodes, which are treated by infiltrating cerium oxide (CeOx) onto their surfaces, in polymer electrolyte membrane fuel cells. The concentration of CeOx on the surface of Pt is adjusted by varying the concentration of the cerium precursor in the infiltration solution. The peak power density of the cell using the Pt cathode featuring the optimal amount of infiltrated CeOx is as high as 400 mW cm−2 at 70 °C, which is approximately 40% higher than that of the cell using the untreated Pt cathode under identical test conditions. Electrochemical impedance analysis confirms that this increase in peak power density is clearly attributed to the decrease in cathodic polarization impedance, which implies that the CeOx deposited on the surface of Pt enhances the catalytic performance of Pt. The infiltration of CeOx on the surface of Pt is also confirmed to be truly effective for improving the stability of Pt. Accelerated degradation tests demonstrate that the degradation rates of the cells using CeOx-Pt cathodes are significantly lower than that of the cell using the untreated Pt cathode because of the preservation of electrochemically active sites, as revealed by cyclic voltammetry.",

keywords = "Cathode, Cerium oxide, Infiltration, Membrane-electrode assembly, Polymer electrolyte membrane fuel cell",

author = "Lee, {Jae Hyeok} and Junmo Koo and Han, {Gwon Deok} and Kim, {Jun Woo} and Choi, {Hyung Jong} and Shim, {Joon Hyung}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (No. NRF-2019R1A2C2003054) and Korea Electric Power Corporation (Grant number: R17XA05-57). Publisher Copyright: {\textcopyright} 2020, Korean Society for Precision Engineering.",

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T1 - Surface Treatment of Pt Cathode Using Ceria Infiltration for High Performance Polymer Electrolyte Membrane Fuel Cells

AU - Lee, Jae Hyeok

AU - Koo, Junmo

AU - Han, Gwon Deok

AU - Kim, Jun Woo

AU - Choi, Hyung Jong

AU - Shim, Joon Hyung

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (No. NRF-2019R1A2C2003054) and Korea Electric Power Corporation (Grant number: R17XA05-57). Publisher Copyright: © 2020, Korean Society for Precision Engineering.

PY - 2021/3

Y1 - 2021/3

N2 - This study evaluates the performance and stability of Pt cathodes, which are treated by infiltrating cerium oxide (CeOx) onto their surfaces, in polymer electrolyte membrane fuel cells. The concentration of CeOx on the surface of Pt is adjusted by varying the concentration of the cerium precursor in the infiltration solution. The peak power density of the cell using the Pt cathode featuring the optimal amount of infiltrated CeOx is as high as 400 mW cm−2 at 70 °C, which is approximately 40% higher than that of the cell using the untreated Pt cathode under identical test conditions. Electrochemical impedance analysis confirms that this increase in peak power density is clearly attributed to the decrease in cathodic polarization impedance, which implies that the CeOx deposited on the surface of Pt enhances the catalytic performance of Pt. The infiltration of CeOx on the surface of Pt is also confirmed to be truly effective for improving the stability of Pt. Accelerated degradation tests demonstrate that the degradation rates of the cells using CeOx-Pt cathodes are significantly lower than that of the cell using the untreated Pt cathode because of the preservation of electrochemically active sites, as revealed by cyclic voltammetry.

AB - This study evaluates the performance and stability of Pt cathodes, which are treated by infiltrating cerium oxide (CeOx) onto their surfaces, in polymer electrolyte membrane fuel cells. The concentration of CeOx on the surface of Pt is adjusted by varying the concentration of the cerium precursor in the infiltration solution. The peak power density of the cell using the Pt cathode featuring the optimal amount of infiltrated CeOx is as high as 400 mW cm−2 at 70 °C, which is approximately 40% higher than that of the cell using the untreated Pt cathode under identical test conditions. Electrochemical impedance analysis confirms that this increase in peak power density is clearly attributed to the decrease in cathodic polarization impedance, which implies that the CeOx deposited on the surface of Pt enhances the catalytic performance of Pt. The infiltration of CeOx on the surface of Pt is also confirmed to be truly effective for improving the stability of Pt. Accelerated degradation tests demonstrate that the degradation rates of the cells using CeOx-Pt cathodes are significantly lower than that of the cell using the untreated Pt cathode because of the preservation of electrochemically active sites, as revealed by cyclic voltammetry.

KW - Cathode

KW - Cerium oxide

KW - Infiltration

KW - Membrane-electrode assembly

KW - Polymer electrolyte membrane fuel cell

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Surface Treatment of Pt Cathode Using Ceria Infiltration for High Performance Polymer Electrolyte Membrane Fuel Cells

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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