Barium-doped Pr2Ni0.6Cu0.4O4+δ with triple conducting characteristics as cathode for intermediate temperature proton conducting solid oxide fuel cell

doi:10.1016/j.cjche.2021.09.010

中国化学工程学报 ›› 2021, Vol. 39 ›› Issue (11): 269-276.DOI: 10.1016/j.cjche.2021.09.010

• Energy Science and Technology • 上一篇下一篇

Barium-doped Pr₂Ni_0.6Cu_0.4O_4+δ with triple conducting characteristics as cathode for intermediate temperature proton conducting solid oxide fuel cell

Chengyi Ai, Tingting Li, Rongzheng Ren, Zhenhua Wang, Wang Sun, Jinsheng Feng, Kening Sun, Jinshuo Qiao

Beijing Key Laboratory for Chemical Power Source and Green Catalysis, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China

收稿日期:2021-04-25 修回日期:2021-08-19 出版日期:2021-11-28 发布日期:2021-12-27
通讯作者: Jinshuo Qiao
基金资助:
This work was supported by the National Natural Science Foundation of China (Grant no. 22078022). We also thank the Analysis & Testing Center, Beijing Institute of Technology for providing testing support.

Barium-doped Pr₂Ni_0.6Cu_0.4O_4+δ with triple conducting characteristics as cathode for intermediate temperature proton conducting solid oxide fuel cell

Chengyi Ai, Tingting Li, Rongzheng Ren, Zhenhua Wang, Wang Sun, Jinsheng Feng, Kening Sun, Jinshuo Qiao

Beijing Key Laboratory for Chemical Power Source and Green Catalysis, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China

Received:2021-04-25 Revised:2021-08-19 Online:2021-11-28 Published:2021-12-27
Contact: Jinshuo Qiao
Supported by:
This work was supported by the National Natural Science Foundation of China (Grant no. 22078022). We also thank the Analysis & Testing Center, Beijing Institute of Technology for providing testing support.

摘要/Abstract

摘要： Proton conducting solid oxide fuel cell (H-SOFC) is an emerging energy conversion device, with lower activation energy and higher energy utilization efficiency. However, the deficiency of highly active cathode materials still remains a major challenge for the development of H-SOFC. Therefore, in this work, K₂NiF₄-type cathode materials Pr_2-xBaNi_0.6Cu_0.4O_4+δ (x=0, 0.1, 0.2, 0.3), single-phase triple-conducting (e^-/O^2-/H⁺) oxides, are prepared for intermediate temperature H-SOFCs and exhibit good oxygen reduction reaction activity. The investigation demonstrates that doping Ba into Pr_2-xBaNi_0.6Cu_0.4O_4+δ can increase its electrochemical performance through enhancing electrical conductivity, oxygen vacancy concentration and proton conductivity. EIS tests are carried at 750℃ and the minimum polarization impedances are obtained when x=0.2, which are 0.068 Ω·cm² in air and 1.336 Ω·cm² in wet argon, respectively. The peak power density of the cell with Pr_1.8Ba_0.2Ni_0.6Cu_0.4O_4+δ cathode is 298 mW·cm^-2 at 750℃ in air with humidified hydrogen as fuel. Based on the above results, Ba-doped Pr_2-xBaNi_0.6Cu_0.4O_4+δ can be a good candidate material for SOFC cathode applications.

关键词: Protonic conducting solid oxide fuel cells, Cathode materials, Element substitution

Abstract: Proton conducting solid oxide fuel cell (H-SOFC) is an emerging energy conversion device, with lower activation energy and higher energy utilization efficiency. However, the deficiency of highly active cathode materials still remains a major challenge for the development of H-SOFC. Therefore, in this work, K₂NiF₄-type cathode materials Pr_2-xBaNi_0.6Cu_0.4O_4+δ (x=0, 0.1, 0.2, 0.3), single-phase triple-conducting (e^-/O^2-/H⁺) oxides, are prepared for intermediate temperature H-SOFCs and exhibit good oxygen reduction reaction activity. The investigation demonstrates that doping Ba into Pr_2-xBaNi_0.6Cu_0.4O_4+δ can increase its electrochemical performance through enhancing electrical conductivity, oxygen vacancy concentration and proton conductivity. EIS tests are carried at 750℃ and the minimum polarization impedances are obtained when x=0.2, which are 0.068 Ω·cm² in air and 1.336 Ω·cm² in wet argon, respectively. The peak power density of the cell with Pr_1.8Ba_0.2Ni_0.6Cu_0.4O_4+δ cathode is 298 mW·cm^-2 at 750℃ in air with humidified hydrogen as fuel. Based on the above results, Ba-doped Pr_2-xBaNi_0.6Cu_0.4O_4+δ can be a good candidate material for SOFC cathode applications.

Key words: Protonic conducting solid oxide fuel cells, Cathode materials, Element substitution

Chengyi Ai, Tingting Li, Rongzheng Ren, Zhenhua Wang, Wang Sun, Jinsheng Feng, Kening Sun, Jinshuo Qiao. Barium-doped Pr₂Ni_0.6Cu_0.4O_4+δ with triple conducting characteristics as cathode for intermediate temperature proton conducting solid oxide fuel cell[J]. 中国化学工程学报, 2021, 39(11): 269-276.

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Barium-doped Pr₂Ni_0.6Cu_0.4O_4+δ with triple conducting characteristics as cathode for intermediate temperature proton conducting solid oxide fuel cell

Barium-doped Pr₂Ni_0.6Cu_0.4O_4+δ with triple conducting characteristics as cathode for intermediate temperature proton conducting solid oxide fuel cell

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