Stability and performance of in-situ formed phosphosilicate nanoparticles in phosphoric acid-doped polybenzimidazole composite membrane fuel cells at elevated temperatures

Zehua Wang; Jin Zhang; Shanfu Lu; Yan Xiang; Zongping Shao; San Ping Jiang

doi:10.1016/j.ijhydene.2024.01.095

Stability and performance of in-situ formed phosphosilicate nanoparticles in phosphoric acid-doped polybenzimidazole composite membrane fuel cells at elevated temperatures

Zehua Wang, Jin Zhang, Shanfu Lu, Yan Xiang, Zongping Shao, San Ping Jiang

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

7 Scopus citations

Abstract

One of the effective strategies to pursue the highly durable high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) is to introduce inorganic fillers to the phosphoric acid-doped polybenzimidazole (PA/PBI) membranes. Among the inorganic fillers, phosphates such as phosphosilicate are effective in mitigating acid loss at elevated temperatures (200–300 °C). In this paper, the effect of in situ formed phosphosilicate on the performance and stability of SiO₂/PA/PBI composite membranes is studied in detail. The mechanical properties and electrochemical performances of the in situ formed SiO₂/PA/PBI membranes depend strongly on the content of in situ formed Si₅P₆O₂₅ fillers and its distribution and microstructure in the membrane. Such in situ formed SiO₂/PA/PBI composite membranes show a high conductivity of 53.5 mS cm⁻¹ at 220 °C. The assembled single cell shows a maximum peak power density (PPD) of 530.6 mW cm⁻² and excellent stability at elevated temperature of 220 °C for over 130 h. The exceptional stability at 220 °C is most likely due to the existence of predominant amorphous phosphosilicate phases in the in situ formed SiO₂/PA/PBI composite membranes, which inhibits the evaporation and leaching of PA at elevated temperatures. The results indicate the practical application of in situ formed SiO₂/PA/PBI composite membranes for HT-PEMFCs.

Original language	English
Pages (from-to)	918-928
Number of pages	11
Journal	International Journal of Hydrogen Energy
Volume	57
DOIs	https://doi.org/10.1016/j.ijhydene.2024.01.095
State	Published - 29 Feb 2024
Externally published	Yes

Keywords

Distribution of relaxation times analysis
High temperature polymer electrolyte membrane fuel cells
In situ formation of amorphous phosphosilicate
Performance
SiO/PA/PBI composite membranes

UN SDGs

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

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10.1016/j.ijhydene.2024.01.095

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@article{20fa83a6f2ff4062a145b0120a9ae7ed,

title = "Stability and performance of in-situ formed phosphosilicate nanoparticles in phosphoric acid-doped polybenzimidazole composite membrane fuel cells at elevated temperatures",

abstract = "One of the effective strategies to pursue the highly durable high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) is to introduce inorganic fillers to the phosphoric acid-doped polybenzimidazole (PA/PBI) membranes. Among the inorganic fillers, phosphates such as phosphosilicate are effective in mitigating acid loss at elevated temperatures (200–300 °C). In this paper, the effect of in situ formed phosphosilicate on the performance and stability of SiO2/PA/PBI composite membranes is studied in detail. The mechanical properties and electrochemical performances of the in situ formed SiO2/PA/PBI membranes depend strongly on the content of in situ formed Si5P6O25 fillers and its distribution and microstructure in the membrane. Such in situ formed SiO2/PA/PBI composite membranes show a high conductivity of 53.5 mS cm−1 at 220 °C. The assembled single cell shows a maximum peak power density (PPD) of 530.6 mW cm−2 and excellent stability at elevated temperature of 220 °C for over 130 h. The exceptional stability at 220 °C is most likely due to the existence of predominant amorphous phosphosilicate phases in the in situ formed SiO2/PA/PBI composite membranes, which inhibits the evaporation and leaching of PA at elevated temperatures. The results indicate the practical application of in situ formed SiO2/PA/PBI composite membranes for HT-PEMFCs.",

keywords = "Distribution of relaxation times analysis, High temperature polymer electrolyte membrane fuel cells, In situ formation of amorphous phosphosilicate, Performance, SiO/PA/PBI composite membranes",

author = "Zehua Wang and Jin Zhang and Shanfu Lu and Yan Xiang and Zongping Shao and Jiang, {San Ping}",

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day = "29",

doi = "10.1016/j.ijhydene.2024.01.095",

language = "英语",

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TY - JOUR

T1 - Stability and performance of in-situ formed phosphosilicate nanoparticles in phosphoric acid-doped polybenzimidazole composite membrane fuel cells at elevated temperatures

AU - Wang, Zehua

AU - Zhang, Jin

AU - Lu, Shanfu

AU - Xiang, Yan

AU - Shao, Zongping

AU - Jiang, San Ping

PY - 2024/2/29

Y1 - 2024/2/29

N2 - One of the effective strategies to pursue the highly durable high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) is to introduce inorganic fillers to the phosphoric acid-doped polybenzimidazole (PA/PBI) membranes. Among the inorganic fillers, phosphates such as phosphosilicate are effective in mitigating acid loss at elevated temperatures (200–300 °C). In this paper, the effect of in situ formed phosphosilicate on the performance and stability of SiO2/PA/PBI composite membranes is studied in detail. The mechanical properties and electrochemical performances of the in situ formed SiO2/PA/PBI membranes depend strongly on the content of in situ formed Si5P6O25 fillers and its distribution and microstructure in the membrane. Such in situ formed SiO2/PA/PBI composite membranes show a high conductivity of 53.5 mS cm−1 at 220 °C. The assembled single cell shows a maximum peak power density (PPD) of 530.6 mW cm−2 and excellent stability at elevated temperature of 220 °C for over 130 h. The exceptional stability at 220 °C is most likely due to the existence of predominant amorphous phosphosilicate phases in the in situ formed SiO2/PA/PBI composite membranes, which inhibits the evaporation and leaching of PA at elevated temperatures. The results indicate the practical application of in situ formed SiO2/PA/PBI composite membranes for HT-PEMFCs.

AB - One of the effective strategies to pursue the highly durable high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) is to introduce inorganic fillers to the phosphoric acid-doped polybenzimidazole (PA/PBI) membranes. Among the inorganic fillers, phosphates such as phosphosilicate are effective in mitigating acid loss at elevated temperatures (200–300 °C). In this paper, the effect of in situ formed phosphosilicate on the performance and stability of SiO2/PA/PBI composite membranes is studied in detail. The mechanical properties and electrochemical performances of the in situ formed SiO2/PA/PBI membranes depend strongly on the content of in situ formed Si5P6O25 fillers and its distribution and microstructure in the membrane. Such in situ formed SiO2/PA/PBI composite membranes show a high conductivity of 53.5 mS cm−1 at 220 °C. The assembled single cell shows a maximum peak power density (PPD) of 530.6 mW cm−2 and excellent stability at elevated temperature of 220 °C for over 130 h. The exceptional stability at 220 °C is most likely due to the existence of predominant amorphous phosphosilicate phases in the in situ formed SiO2/PA/PBI composite membranes, which inhibits the evaporation and leaching of PA at elevated temperatures. The results indicate the practical application of in situ formed SiO2/PA/PBI composite membranes for HT-PEMFCs.

KW - Distribution of relaxation times analysis

KW - High temperature polymer electrolyte membrane fuel cells

KW - In situ formation of amorphous phosphosilicate

KW - Performance

KW - SiO/PA/PBI composite membranes

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DO - 10.1016/j.ijhydene.2024.01.095

M3 - 文章

AN - SCOPUS:85182506756

SN - 0360-3199

VL - 57

SP - 918

EP - 928

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

ER -

Stability and performance of in-situ formed phosphosilicate nanoparticles in phosphoric acid-doped polybenzimidazole composite membrane fuel cells at elevated temperatures

Abstract

Keywords

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