Tailoring the Ratio of A-Site Cations in Pr1- xNd xBaCo1.6Fe0.4O5+δto Promote the Higher Oxygen Reduction Reaction Activity for Low-Temperature Solid Oxide Fuel Cells

Inyoung Jang; Hyungjun Lee; Rizcky Tamarany; Heesung Yoon; Chanho Kim; Sungmin Kim; Chan Woo Lee; Taeseup Song; Ungyu Paik

doi:10.1021/acs.chemmater.9b05378

Tailoring the Ratio of A-Site Cations in Pr_{1- x}Nd _xBaCo_1.6Fe_0.4O_5+δto Promote the Higher Oxygen Reduction Reaction Activity for Low-Temperature Solid Oxide Fuel Cells

Inyoung Jang, Hyungjun Lee, Rizcky Tamarany, Heesung Yoon, Chanho Kim, Sungmin Kim, Chan Woo Lee, Taeseup Song, Ungyu Paik

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

28 Scopus citations

Abstract

Solid oxide fuel cells (SOFCs) are promising sustainable energy systems due to their high energy conversion efficiency and low pollutant emission rate. However, the high operating temperature induces poor durability of the systems. Therefore, it is crucial to improve the oxygen reduction reaction (ORR) activity of the cathode material to lower the operating temperature. Recently, a double-layered perovskite material (AA′B2O5+δ), especially PrBaCo1.6Fe0.4O5+δ (PBCF), has received significant attention due to its high ORR activity. Herein, we report an A-site-tailored PBCF cathode material to enhance the ORR activity by employing a dopant that can increase oxygen vacancies in the structure. Since the oxygen vacancy is known as the charge carrier for the oxygen ion in oxide materials, increasing the oxygen vacancy concentration can improve the electrochemical performances of the cathode material at a lower operating temperature range (under 600 °C). Nd was employed as a dopant at the A-site due to its similarity in size to Pr and the lower valance state, which can increase the oxygen vacancy concentration in the structure. The cathode material with 20% Nd in the A-site of PBCF showed the highest I-V-P performance and lowest activation energy for the oxygen reduction reaction. As a result, our designed material showed a high peak power density of 1.34 W/cm2 at 600 °C, which is 109% higher than that of PBCF.

Original language	English
Pages (from-to)	3841-3849
Number of pages	9
Journal	Chemistry of Materials
Volume	32
Issue number	9
DOIs	https://doi.org/10.1021/acs.chemmater.9b05378
State	Published - May 12 2020
Externally published	Yes

Funding

This work was supported by the “Human Resources Program in Energy Technology” of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20194010201890). This work was also supported by the Nano-Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (NRF-2018M3A7B4065593).

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title = "Tailoring the Ratio of A-Site Cations in Pr1- xNd xBaCo1.6Fe0.4O5+δto Promote the Higher Oxygen Reduction Reaction Activity for Low-Temperature Solid Oxide Fuel Cells",

abstract = "Solid oxide fuel cells (SOFCs) are promising sustainable energy systems due to their high energy conversion efficiency and low pollutant emission rate. However, the high operating temperature induces poor durability of the systems. Therefore, it is crucial to improve the oxygen reduction reaction (ORR) activity of the cathode material to lower the operating temperature. Recently, a double-layered perovskite material (AA′B2O5+δ), especially PrBaCo1.6Fe0.4O5+δ (PBCF), has received significant attention due to its high ORR activity. Herein, we report an A-site-tailored PBCF cathode material to enhance the ORR activity by employing a dopant that can increase oxygen vacancies in the structure. Since the oxygen vacancy is known as the charge carrier for the oxygen ion in oxide materials, increasing the oxygen vacancy concentration can improve the electrochemical performances of the cathode material at a lower operating temperature range (under 600 °C). Nd was employed as a dopant at the A-site due to its similarity in size to Pr and the lower valance state, which can increase the oxygen vacancy concentration in the structure. The cathode material with 20\% Nd in the A-site of PBCF showed the highest I-V-P performance and lowest activation energy for the oxygen reduction reaction. As a result, our designed material showed a high peak power density of 1.34 W/cm2 at 600 °C, which is 109\% higher than that of PBCF.",

author = "Inyoung Jang and Hyungjun Lee and Rizcky Tamarany and Heesung Yoon and Chanho Kim and Sungmin Kim and Lee, \{Chan Woo\} and Taeseup Song and Ungyu Paik",

note = "Publisher Copyright: {\textcopyright} 2020 American Chemical Society.",

year = "2020",

month = may,

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doi = "10.1021/acs.chemmater.9b05378",

language = "English",

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T1 - Tailoring the Ratio of A-Site Cations in Pr1- xNd xBaCo1.6Fe0.4O5+δto Promote the Higher Oxygen Reduction Reaction Activity for Low-Temperature Solid Oxide Fuel Cells

AU - Jang, Inyoung

AU - Lee, Hyungjun

AU - Tamarany, Rizcky

AU - Yoon, Heesung

AU - Kim, Chanho

AU - Kim, Sungmin

AU - Lee, Chan Woo

AU - Song, Taeseup

AU - Paik, Ungyu

PY - 2020/5/12

Y1 - 2020/5/12

N2 - Solid oxide fuel cells (SOFCs) are promising sustainable energy systems due to their high energy conversion efficiency and low pollutant emission rate. However, the high operating temperature induces poor durability of the systems. Therefore, it is crucial to improve the oxygen reduction reaction (ORR) activity of the cathode material to lower the operating temperature. Recently, a double-layered perovskite material (AA′B2O5+δ), especially PrBaCo1.6Fe0.4O5+δ (PBCF), has received significant attention due to its high ORR activity. Herein, we report an A-site-tailored PBCF cathode material to enhance the ORR activity by employing a dopant that can increase oxygen vacancies in the structure. Since the oxygen vacancy is known as the charge carrier for the oxygen ion in oxide materials, increasing the oxygen vacancy concentration can improve the electrochemical performances of the cathode material at a lower operating temperature range (under 600 °C). Nd was employed as a dopant at the A-site due to its similarity in size to Pr and the lower valance state, which can increase the oxygen vacancy concentration in the structure. The cathode material with 20% Nd in the A-site of PBCF showed the highest I-V-P performance and lowest activation energy for the oxygen reduction reaction. As a result, our designed material showed a high peak power density of 1.34 W/cm2 at 600 °C, which is 109% higher than that of PBCF.

AB - Solid oxide fuel cells (SOFCs) are promising sustainable energy systems due to their high energy conversion efficiency and low pollutant emission rate. However, the high operating temperature induces poor durability of the systems. Therefore, it is crucial to improve the oxygen reduction reaction (ORR) activity of the cathode material to lower the operating temperature. Recently, a double-layered perovskite material (AA′B2O5+δ), especially PrBaCo1.6Fe0.4O5+δ (PBCF), has received significant attention due to its high ORR activity. Herein, we report an A-site-tailored PBCF cathode material to enhance the ORR activity by employing a dopant that can increase oxygen vacancies in the structure. Since the oxygen vacancy is known as the charge carrier for the oxygen ion in oxide materials, increasing the oxygen vacancy concentration can improve the electrochemical performances of the cathode material at a lower operating temperature range (under 600 °C). Nd was employed as a dopant at the A-site due to its similarity in size to Pr and the lower valance state, which can increase the oxygen vacancy concentration in the structure. The cathode material with 20% Nd in the A-site of PBCF showed the highest I-V-P performance and lowest activation energy for the oxygen reduction reaction. As a result, our designed material showed a high peak power density of 1.34 W/cm2 at 600 °C, which is 109% higher than that of PBCF.

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Tailoring the Ratio of A-Site Cations in Pr_{1- x}Nd _xBaCo_1.6Fe_0.4O_5+δto Promote the Higher Oxygen Reduction Reaction Activity for Low-Temperature Solid Oxide Fuel Cells

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