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Yb?O? Doped Zr0.92Y0.08O2-?(8YSZ) and Its Composite Electrolyte for Intermediate Temperature Solid Oxide Fuel Cells.

ABSTRACT: Yb3+ and Y3+ double doped ZrO? (8YSZ+4Yb?O?) samples were synthesized by a solid state reaction method. Moreover, 8YSZ+4Yb?O?-NaCl/KCl composites were also successfully produced at different temperatures. The 8YSZ+4Yb?O?, 8YSZ+4Yb?O?-NaCl/KCl (800 °C), and 8YSZ+4Yb?O?-NaCl/KCl (1000 °C) samples were characterized by x?ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that a dense composite electrolyte was formed at a low temperature of 800 °C. The maximum conductivities of 4.7 × 10-2 S·cm-1, 6.1 × 10-1 S·cm-1, and 3.8 × 10-1 S·cm-1 were achieved for the 8YSZ+4Yb?O?, 8YSZ+4Yb?O?-NaCl/KCl (800 °C), and 8YSZ+4Yb?O?-NaCl/KCl (1000 °C) samples at 700 °C, respectively. The log?~log (pO?) plot result showed that the 8YSZ+4Yb?O?-NaCl/KCl (800 °C) composite electrolyte is a virtually pure ionic conductor. An excellent performance of the 8YSZ+4Yb?O?-NaCl/KCl (800 °C) composite was obtained with a maximum power density of 364 mW·cm-2 at 700 °C.

SUBMITTER: Cui Y 

PROVIDER: S-EPMC6213107 | biostudies-other | 2018 Sep

REPOSITORIES: biostudies-other

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Yb₂O₃ Doped Zr<sub>0.92</sub>Y<sub>0.08</sub>O<sub>2-α</sub>(8YSZ) and Its Composite Electrolyte for Intermediate Temperature Solid Oxide Fuel Cells.

Cui Yumin Y   Shi Ruijuan R   Liu Junlong J   Wang Hongtao H   Li Huiquan H  

Materials (Basel, Switzerland) 20180925 10

Yb<sup>3+</sup> and Y<sup>3+</sup> double doped ZrO₂ (8YSZ+4Yb₂O₃) samples were synthesized by a solid state reaction method. Moreover, 8YSZ+4Yb₂O₃-NaCl/KCl composites were also successfully produced at different temperatures. The 8YSZ+4Yb₂O₃, 8YSZ+4Yb₂O₃-NaCl/KCl (800 °C), and 8YSZ+4Yb₂O₃-NaCl/KCl (1000 °C) samples were characterized by x⁻ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that a dense composite electrolyte was formed at a low temperature of 800 °C.  ...[more]

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