商用材料的可控制技术用于固体氧化物电解电池的热膨胀系数
1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
Materials (Basel, Switzerland)
|March 13, 2024
概括
一种新的火和兴奋剂方法可控地调整La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) 材料的热膨胀系数. 这种简单,低成本的策略提高了固体氧化物电解电池 (SOEC) 材料的兼容性和寿命.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 固体氧化物电解电池 (SOEC) 对于工业应用至关重要,但面临着寿命限制.
- 在SOEC材料之间不匹配的热膨胀系数 (CTEs) 会导致降解并阻碍工业发展.
- 现有的解决方案,如兴奋剂和缺陷工程,在解决CTE不匹配方面存在局限性.
研究的目的:
- 开发一种直接的,具有成本效益的方法来控制商业SOEC材料的CTE.
- 为了研究火和兴奋剂过程对La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) CTE的有效性.
- 通过提高材料兼容性和运行稳定性,促进国有经济体的工业化.
主要方法:
- 商用La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) 经过800°C的热处理,然后进行快速冷却 (灭).
- 火过程涉及将加热的LSCF冷却在3.4mol/L Y(NO3) 3溶液中,以诱导兴奋剂并增加氧气空缺.
- 经过治疗的LSCF的CTE被测量并与未经处理的 (空白) 样本进行比较.
主要成果:
- 火和兴奋剂治疗成功地将LSCF的CTE从14.1 × 10-6 K-1降低到13.6 × 10-6 K-1.
- 通过火进行微处理不会对后续的制备步骤产生负面影响,例如粉末泥加工和烧结.
- 该方法提供了一种简单,低成本和通用的方法,用于在商业SOEC材料中控制CTE.
结论:
- 火和兴奋剂是一种有效的策略来定制LSCF的CTE,解决SOEC技术的一个关键挑战.
- 这种可控制的CTE制备方法有可能显著改善SOEC设备的寿命和可靠性.
- 未来的研究可以利用这种火过程与各种兴奋剂元素来实现CTE匹配在不同的SOEC组件.
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