Electrochemical performance of La2NiO4+δ-Ce0.55La0.45O2−δ as a promising bifunctional oxygen electrode for reversible solid oxide cells
Autor: | Wenyan Zhao, Chang-An Wang, Wei Yang, Chuanjin Tian, Pengzhang Li, Zhe Lü, Zhipeng Xie |
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Rok vydání: | 2021 |
Předmět: |
Electrolysis
Materials science Standard hydrogen electrode Ionic transfer Inorganic chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Oxygen 0104 chemical sciences Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound chemistry law Electrode Ceramics and Composites 0210 nano-technology Triple phase boundary Bifunctional Clark electrode |
Zdroj: | Journal of Advanced Ceramics. 10:328-337 |
ISSN: | 2227-8508 2226-4108 |
DOI: | 10.1007/s40145-020-0445-y |
Popis: | In this work, La2NiO4+δ-xCe0.55La0.45O2−δ (denoted as LNO-xLDC) with various LDC contents (x = 0, 10, 20, 30, and 40 wt%) were prepared and evaluated as bifunctional oxygen electrodes for reversible solid oxide cells (RSOCs). Compared with the pure LNO, the optimum composition of LNO-30LDC exhibited the lowest polarization resistance (Rp) of 0.53 and 0.12 Ω·cm2 in air at 650 and 750 °C, respectively. The enhanced electrochemical performance of LNO-30LDC oxygen electrode was mainly attributed to the extended triple phase boundary and more oxygen ionic transfer channels. The hydrogen electrode supported single cell with LNO-30LDC oxygen electrode displayed peak power densities of 276, 401, and 521 mW·cm−2 at 700, 750, and 800 °C, respectively. Moreover, the electrolysis current density of the single cell demonstrated 526.39 mA·cm−2 under 1.5 V at 800 °C, and the corresponding hydrogen production rate was 220.03 mL·cm−2·h−1. The encouraging results indicated that LNO-30LDC was a promising bifunctional oxygen electrode material for RSOCs. |
Databáze: | OpenAIRE |
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