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基于辐射质子交换膜的电化学的特点
Nataliya A Ivanova1, Boris V Ivanov1, Ruslan M Mensharapov1
1National Research Center "Kurchatov Institute", 1, Akademika Kurchatova sq., 123182 Moscow, Russia.
Membranes
|November 24, 2023
概括
电离辐射损坏了电化学中的质子交换膜 (PEM),降低了性能. 提高工作温度可以减轻但不能消除辐射对EHP性能的影响.
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
- 核工程 核工程是指核工程.
背景情况:
- 电化学 (EHP) 整合了的提取,净化和压缩.
- 质子交换膜 (PEM) 是聚变循环系统的EHP中的关键组件.
- 了解辐射对PEM的影响对于聚变环境中的EHP耐用性至关重要.
研究的目的:
- 调查电离辐射对EHP内的PEM特性的影响.
- 为了量化由于辐射诱导的PEM降解导致EHP的性能变化.
- 探索温度对减轻辐射损伤的影响,用于EPH的PEM.
主要方法:
- 在EHP中暴露于电离辐射的PEM.
- 测量PEM导电性和EHP性能 (设备性能,电流密度).
- 使用小角度X射线散射 (SAXS) 分析结构变化.
主要成果:
- 辐射导致非特异性降解,结构变化和导电率降低 (0.115到0.103 S cm-1).
- 设备性能在30°C下降一半,原因是导电能力下降.
- 萨克斯 (SAXS) 表示结构变化;水吸收保持不变.
- 升高的操作温度减少了性能损失,但导致在50°C时干燥,降低了电流密度 (0.52到0.32 A·cm-2).
结论:
- 电离辐射显著降解PEM,影响EHP性能.
- 结构修改和导电性损失是辐射暴露的关键后果.
- 操作温度是管理辐射对EHP性能影响的关键因素,尽管它可能带来其他挑战,例如膜干燥.
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