在多组分 ABO4型氧化物中的质子导电性
Ashraf A A Elameen1,2, Arkadiusz Dawczak2, Tadeusz Miruszewski2
1Department of Chemical and Physical Sciences, University of L'Aquila, L'Aquila, Italy.
Physical chemistry chemical physics : PCCP
|October 23, 2023
概括
氧化物中的配置影响质子导电性. 在LaNbO4氧化物中引入更多的元素增强了质子传输,五元素组成显示了最高的导电性.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 电化学 电化学 电化学
背景情况:
- 氧化物中的质子导电性对于能源应用至关重要.
- 配置是影响材料中离子运输的潜在因素.
- 了解材料组成和质子导电性之间的关系对于开发先进的陶电解质至关重要.
研究的目的:
- 为了研究配置对复杂氧化物中质子导电性的影响.
- 为了合成和表征新的多元替代A位氧化物.
- 在不同的大气和温度条件下评估这些材料的质子传输特性.
主要方法:
- 合成了三种新型A位置换的ANbO4氧化物,其元素复杂度越来越高 (5,6和7元素).
- 合成材料的表征使用技术来确认单相形成 (单临床费尔古索尼特结构).
- 在干燥和潮湿的大气中测量电导率,温度范围为600-800°C,以确定质子导率.
主要成果:
- 所有合成的样本都保持了同质的单相单临床费尔古索尼特结构.
- 在所有样本中观察到质子导电性,干燥和潮湿大气之间的导电性差异证明了这一点.
- 具有五个元素 (La1/5 Nd1/5 Sm1/5 Gd1/5 Eu1/5NbO4) 的样本表现出最高的质子导电性,在潮湿的大气中在800°C时达到大约3.0 × 10^-6 S cm^-1.
结论:
- 通过ANbO4氧化物中的多元素替代增加配置,可以积极影响质子导电性.
- 合成的复杂氧化物显示出适度的质子导电性,这表明进一步优化的潜力.
- 这项研究强调了构成障碍在设计质子导电陶材料中的重要性.
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