超级电容器的多物理测量方法 确定健康状态
Thomas Doucet1, Jean-François Mogniotte2, Raphaël Amiot2
1Université Claude Bernard Lyon 1, INSA Lyon, Ecole Centrale de Lyon, CNRS, Ampère, UMR5005, F-69100 Villeurbanne, France.
这项研究揭示了超级电容器外的机械变形与其健康状况 (SoH) 有关. 监测外应变为评估超级电容器老化和性能下降提供了一种实用,非侵入性的方法.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 超级电容器是重要的储能设备.
- 了解超级电容器的衰老对于可靠的性能至关重要.
- 当前健康状况 (SoH) 监测方法可以是侵入性的或复杂的.
研究的目的:
- 在加速条件下研究超级电容器的衰老机制.
- 为了建立超级电容SoH和机械变形之间的相关性.
- 为实时SoH监测开发一种非侵入性方法.
主要方法:
- 在不同的循环条件和温度下对超级电容器老化的比较研究.
- 使用张力计来测量老化过程中的外变形.
- 应用Brunauer-Emmett-Teller (BET) 理论来建模电容色.
主要成果:
- 确定了初始的"燃烧"阶段,然后在超级电容器中进行线性老化.
- 证明了电容色,内部电阻和外变形之间的直接相关性.
- 与实验数据对抗电容色的验证模型预测.
结论:
- 超级电容器外的机械变形是SoH的可靠指标.
- 张力表监测为评估超级电容器衰老提供了一种实用且非侵入性的方法.
- 老化过程中的气体吸附显著导致性能下降,正如BET建模所建议的那样.
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