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Article

A Reversible Protonic Ceramic Cell with Symmetrically Designed Pr2NiO4+δ-Based Electrodes: Fabrication and Electrochemical Features

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Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes, Institute of High Temperature Electrochemistry, Yekaterinburg 620137, Russia
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Institute of New Materials and Technologies, Ural Federal University, Yekaterinburg 620002, Russia
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Institute of Chemical Engineering, Ural Federal University, Yekaterinburg 620002, Russia
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Laboratory of Solid State Oxide Fuel Cells, Institute of High Temperature Electrochemistry, Yekaterinburg 620137, Russia
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Graduate School of Economics and Management, Ural Federal University, Yekaterinburg 620002, Russia
*
Author to whom correspondence should be addressed.
Materials 2019, 12(1), 118; https://doi.org/10.3390/ma12010118
Received: 23 November 2018 / Revised: 12 December 2018 / Accepted: 26 December 2018 / Published: 31 December 2018
Reversible protonic ceramic cells (rPCCs) combine two different operation regimes, fuel cell and electrolysis cell modes, which allow reversible chemical-to-electrical energy conversion at reduced temperatures with high efficiency and performance. Here we present novel technological and materials science approaches, enabling a rPCC with symmetrical functional electrodes to be prepared using a single sintering step. The response of the cell fabricated on the basis of P–N–BCZD|BCZD|PBN–BCZD (where BCZD = BaCe0.5Zr0.3Dy0.2O3−δ, PBN = Pr1.9Ba0.1NiO4+δ, P = Pr2O3, N = Ni) is studied at different temperatures and water vapor partial pressures (pH2O) by means of volt-ampere measurements, electrochemical impedance spectroscopy and distribution of relaxation times analyses. The obtained results demonstrate that symmetrical electrodes exhibit classical mixed-ionic/electronic conducting behavior with no hydration capability at 750 °C; therefore, increasing the pH2O values in both reducing and oxidizing atmospheres leads to some deterioration of their electrochemical activity. At the same time, the electrolytic properties of the BCZD membrane are improved, positively affecting the rPCC’s efficiency. The electrolysis cell mode of the rPCC is found to be more appropriate than the fuel cell mode under highly humidified atmospheres, since its improved performance is determined by the ohmic resistance, which decreases with pH2O increasing. View Full-Text
Keywords: PCFCs/PCECs; Ruddlesden-Popper phases; symmetrical cells; proton-conducting electrolytes PCFCs/PCECs; Ruddlesden-Popper phases; symmetrical cells; proton-conducting electrolytes
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MDPI and ACS Style

Tarutin, A.; Lyagaeva, J.; Farlenkov, A.; Plaksin, S.; Vdovin, G.; Demin, A.; Medvedev, D. A Reversible Protonic Ceramic Cell with Symmetrically Designed Pr2NiO4+δ-Based Electrodes: Fabrication and Electrochemical Features. Materials 2019, 12, 118. https://doi.org/10.3390/ma12010118

AMA Style

Tarutin A, Lyagaeva J, Farlenkov A, Plaksin S, Vdovin G, Demin A, Medvedev D. A Reversible Protonic Ceramic Cell with Symmetrically Designed Pr2NiO4+δ-Based Electrodes: Fabrication and Electrochemical Features. Materials. 2019; 12(1):118. https://doi.org/10.3390/ma12010118

Chicago/Turabian Style

Tarutin, Artem, Julia Lyagaeva, Andrey Farlenkov, Sergey Plaksin, Gennady Vdovin, Anatoly Demin, and Dmitry Medvedev. 2019. "A Reversible Protonic Ceramic Cell with Symmetrically Designed Pr2NiO4+δ-Based Electrodes: Fabrication and Electrochemical Features" Materials 12, no. 1: 118. https://doi.org/10.3390/ma12010118

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