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Ba1-xSrxZr0.1Ce0.7Y0.1Yb0.1O3-δ电解质材料的制备与性能研究
Synthesis and Properties of Ba1-xSrxZr0.1Ce0.7Y0.1Yb0.1O3-δ Electrolyte Materials

DOI: 10.12677/ms.2025.154065, PP. 605-613

Keywords: 质子导体电解质，固体氧化物燃料电池，烧结性能，电导率，Sr掺杂
Proton-Conducting Electrolyte, Solid Oxide Fuel Cell, Sinterability, Electrical Conductivity, Sr Doping

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Abstract:

采用甘氨酸–硝酸盐燃烧法合成了Ba1-xSrxZr0.1Ce0.7Y0.1Yb0.1O3-δ (x = 0, 0.25, 0.5, 0.75, 1)系列钙钛矿电解质材料，系统探究了Sr元素掺杂对BZCYYb电解质材料的物相结构、烧结活性及电化学性能的影响。X射线衍射结果可以看出不同Sr掺杂的BZCYYb粉体主相均为钙钛矿结构。烧结实验表明，Sr掺杂能够提升电解质粉体烧结活性，粉体可在1350℃烧结致密。电化学阻抗谱测试表明，随着Sr含量增加粉体电导率先升高后降低，Ba0.75Sr0.25Zr0.1Ce0.7Y0.1Yb0.1O3-δ电导率最高，700℃时可达18.77 × 10？3 S·cm？1，通过阿伦尼乌斯关系拟合活化能为0.59 eV。
A series of Ba1-xSrxZr0.1Ce0.7Y0.1Yb0.1O3-δ (x = 0, 0.25, 0.5, 0.75, 1) perovskite-type electrolyte materials were synthesized via the glycine-nitrate combustion method. The effects of Sr doping on the phase structure, sinterability, and electrochemical performance of BZCYYb electrolytes were systematically investigated. X-ray diffraction results confirmed that all Sr-doped BZCYYb powders retained a single-phase perovskite structure. Sintering experiments demonstrated that Sr doping significantly enhanced the sintering activity of the electrolyte powders, enabling dense ceramic pellets to be obtained at 1350？C. Electrochemical impedance spectroscopy revealed that the electrical conductivity of the materials initially increased and then decreased with higher Sr content. The Ba0.75Sr0.25Zr0.1Ce0.7Y0.1b0.1O3-δ composition exhibited the highest conductivity of 18.77 × 10？3 S·cm？1 at 700？C, with an activation energy of 0.59 eV calculated from the Arrhenius relationship.

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