具有非凡的氧离子导电性,用于低温固体氧化物燃料电池的Gd合的Ceria
Prerna Vinchhi1, Abhijit Ray1,2, Kaushik Mallik3
1Department of Solar Energy, Pandit Deendayal Energy University, Gandhinagar, Gujarat, 382421, India.
Scientific reports
|August 16, 2024
概括
加多利尼亚化 (GDC) 纳米颗粒被合成为固体氧化物燃料电池. 含有15mol%Gd3+的GDC显示出最高的离子导电性,证明了氧空缺与性能增强之间的联系.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术 纳米技术
背景情况:
- 化是固体氧化物燃料电池 (SOFC) 的一个关键的电解质.
- 加多利尼亚合纤维素 (GDC) 特别适用于低温SOFC应用.
- 优化GDC合成并了解其特性对于高效的能量转换至关重要.
研究的目的:
- 通过协同沉方法合成加多利尼亚合 (GDC) 纳米颗粒.
- 研究GDC的结构,形态和电化学特性.
- 为了确定氧空度和GDC中的离子导电性之间的相关性.
主要方法:
- 共同沉方法用于GDC纳米粒子合成 (GdxCe1−xO2−δ,0 < x < 0.20).
- 用X射线衍射 (XRD) 和拉曼光谱进行相位和缺陷分析.
- 场发射扫描电子显微镜 (FESEM) 与能量分散光谱 (EDS) 用于形态学和元素映射.
- 电化学阻抗光谱 (EIS) 用于在不同温度 (350-700°C) 中确定离子导电性.
主要成果:
- 成功合成了具有立方相和确认氧空缺的GDC纳米粒子.
- FESEM揭示了具有~98%理论密度的紧粒.
- 用15mol%Gd3+ (Gd0.15Ce0.85O2−δ) 合的GDC表现出最高的粒度边界离子导电率 (0.104 S cm−1在700°C),激活能量为0.81 eV.
结论:
- 共同沉方法有效地产生了密集的GDC纳米粒子.
- 加多兴奋剂通过创造氧气空缺,显著提高了中的离子导电性.
- 优化的GDC成分 (15mol%Gd3+) 显示出作为低温SOFC的高效电解质的承诺.
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