CsH2PO4/NdPO4 Composites as Proton Conducting Electrolytes for Intermediate Temperature Fuel Cells

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@article{26c701b1e9c2428f8304345da250a3e6,
title = "CsH2PO4/NdPO4 Composites as Proton Conducting Electrolytes for Intermediate Temperature Fuel Cells",
abstract = "Composite proton conducting materials based on cesium dihydrogen phosphate and neodymium phosphate hydrate were prepared and investigated in terms of X-ray diffraction, thermogravimetry, conductivity, stability and fuel cell performance. At 150°C the conductivity was 1.8 × 10−6 S cm−1 for the pristine cesium dihydrogen phosphate and 0.8 × 10−4 S cm−1 for neodymium phosphate hydrate, while that of the composite containing 29 mol{\%} neodymium phosphate and 71 mol{\%} cesium dihydrogen phosphate was 0.4 × 10−2 S cm−1. It was proposed that the interaction between the two components establishes a dynamic hydrogen bonding network enabling efficient proton conduction long before the development of the extensive phase disordering of the superprotonic transition. The presence of thermally stable hydrate water present in neodymium phosphate may also play a role in improving both conductivity and stability of the solid acid. The electromotive force, open circuit voltage and fuel cell performance were measured as demonstration of the material application.",
keywords = "Fuel Cells, Electrolyzers, Energy Conversion",
author = "Tatiana Anfimova and Jensen, {Annemette Hindhede} and Erik Christensen and Jensen, {Jens Oluf} and Bjerrum, {Niels J.} and Qingfeng Li",
year = "2015",
doi = "10.1149/2.0671504jes",
language = "English",
volume = "162",
pages = "F436--F441",
journal = "Journal of The Electrochemical Society",
issn = "0013-4651",
publisher = "The Electrochemical Society",
number = "4",

}

RIS

TY - JOUR

T1 - CsH2PO4/NdPO4 Composites as Proton Conducting Electrolytes for Intermediate Temperature Fuel Cells

AU - Anfimova, Tatiana

AU - Jensen, Annemette Hindhede

AU - Christensen, Erik

AU - Jensen, Jens Oluf

AU - Bjerrum, Niels J.

AU - Li, Qingfeng

PY - 2015

Y1 - 2015

N2 - Composite proton conducting materials based on cesium dihydrogen phosphate and neodymium phosphate hydrate were prepared and investigated in terms of X-ray diffraction, thermogravimetry, conductivity, stability and fuel cell performance. At 150°C the conductivity was 1.8 × 10−6 S cm−1 for the pristine cesium dihydrogen phosphate and 0.8 × 10−4 S cm−1 for neodymium phosphate hydrate, while that of the composite containing 29 mol% neodymium phosphate and 71 mol% cesium dihydrogen phosphate was 0.4 × 10−2 S cm−1. It was proposed that the interaction between the two components establishes a dynamic hydrogen bonding network enabling efficient proton conduction long before the development of the extensive phase disordering of the superprotonic transition. The presence of thermally stable hydrate water present in neodymium phosphate may also play a role in improving both conductivity and stability of the solid acid. The electromotive force, open circuit voltage and fuel cell performance were measured as demonstration of the material application.

AB - Composite proton conducting materials based on cesium dihydrogen phosphate and neodymium phosphate hydrate were prepared and investigated in terms of X-ray diffraction, thermogravimetry, conductivity, stability and fuel cell performance. At 150°C the conductivity was 1.8 × 10−6 S cm−1 for the pristine cesium dihydrogen phosphate and 0.8 × 10−4 S cm−1 for neodymium phosphate hydrate, while that of the composite containing 29 mol% neodymium phosphate and 71 mol% cesium dihydrogen phosphate was 0.4 × 10−2 S cm−1. It was proposed that the interaction between the two components establishes a dynamic hydrogen bonding network enabling efficient proton conduction long before the development of the extensive phase disordering of the superprotonic transition. The presence of thermally stable hydrate water present in neodymium phosphate may also play a role in improving both conductivity and stability of the solid acid. The electromotive force, open circuit voltage and fuel cell performance were measured as demonstration of the material application.

KW - Fuel Cells

KW - Electrolyzers

KW - Energy Conversion

U2 - 10.1149/2.0671504jes

DO - 10.1149/2.0671504jes

M3 - Journal article

VL - 162

SP - F436-F441

JO - Journal of The Electrochemical Society

JF - Journal of The Electrochemical Society

SN - 0013-4651

IS - 4

ER -