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制备和电化学溶解可溶性氧化碳阳极

Zhiqiang Yang¹, Mingshuai Yang², Zhenfang Shen²

¹AECC Aero Science and Technology Co. LTD., Metrology and Phys & Chem Testing Center, Chengdu 610503, China.

Inorganic chemistry

|August 4, 2023

概括

开发了一种新的可溶性氧化碳阳极,用于盐应用. 这种材料具有出色的导电性和稳定性,为先进的核燃料再加工铺平了道路.

科学领域:

材料科学材料科学材料科学
核工程核工程是指核工程.
电化学电化学电化学

背景情况:

盐反应堆和热处理技术需要稳定和导电性阳极材料.
氧碳化物为高温应用提供了潜力,但需要合成优化.
了解在盐中的溶解和物种化对于再加工至关重要.

研究的目的:

合成一种可溶性氧化碳 (UC 0.4O 0.6) 的阳极材料.
为了评估其在LiCl-KCl盐中的电化学行为和稳定性.
为了研究离子的物种化和电解在盐中.

主要方法:

在真空下,在1750°C的温度下对U 3O 8,UO 2 和石墨进行碳热还原.
使用线性扫描电压计 (LSV),循环电压计 (CV) 和方波电压计 (SWV) 的电化学分析.
合成材料的电解和产品特征使用X射线衍射 (XRD) 和扫描电子显微镜与能量分散光谱 (SEM-EDS).

主要成果:

成功合成可溶性氧化碳化物 (UC 0.4O 0.6),在LiCl-KCl盐中具有出色的导电性和稳定性.
确定了UC 0.4O 0.6溶解的关键电化学参数,包括初始溶解,快速溶解和被动化潜力.
观察到Li 2O添加抑制了U(VI) 挥发,并增加了UO 2 2+度,促进了电解到UO 2.

结论:

合成的UC 0.4O 0.6由于其稳定性和导电性,是融盐应用的有希望的阳极材料.
电化学研究为理解在再加工过程中在盐中的行为提供了关键数据.
在盐中对物种进行控制的电解,在Li 2O的帮助下,成功地产生了UO 2.

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