Albero Blanquer Laura, Marchini Florencia, Seitz Jan Roman, Daher Nour, Bétermier Fanny, Huang Jiaqiang, Gervillié Charlotte, Tarascon Jean-Marie
Collège de France, Chimie du Solide et de l'Energie-UMR 8260 CNRS, 11 Place Marcelin Berthelot, 75005, Paris, France.
Réseau sur le Stockage Electrochimique de l'Energie (RS2E)-FR CNRS 3459, 80039, Amiens Cedex, France.
Nat Commun. 2022 Mar 3;13(1):1153. doi: 10.1038/s41467-022-28792-w.
The study of chemo-mechanical stress taking place in the electrodes of a battery during cycling is of paramount importance to extend the lifetime of the device. This aspect is particularly relevant for all-solid-state batteries where the stress can be transmitted across the device due to the stiff nature of the solid electrolyte. However, stress monitoring generally relies on sensors located outside of the battery, therefore providing information only at device level and failing to detect local changes. Here, we report a method to investigate the chemo-mechanical stress occurring at both positive and negative electrodes and at the electrode/electrolyte interface during battery operation. To such effect, optical fiber Bragg grating sensors were embedded inside coin and Swagelok cells containing either liquid or solid-state electrolyte. The optical signal was monitored during battery cycling, further translated into stress and correlated with the voltage profile. This work proposes an operando technique for stress monitoring with potential use in cell diagnosis and battery design.
研究电池在循环过程中电极内发生的化学机械应力对于延长设备寿命至关重要。这一方面对于全固态电池尤为重要，因为由于固体电解质的刚性，应力可以在整个设备中传递。然而，应力监测通常依赖于位于电池外部的传感器，因此仅在设备层面提供信息，无法检测局部变化。在此，我们报告了一种方法，用于研究电池运行期间正负极以及电极/电解质界面处发生的化学机械应力。为此，将光纤布拉格光栅传感器嵌入包含液体或固态电解质的硬币电池和Swagelok电池内部。在电池循环过程中监测光信号，进一步转换为应力并与电压曲线相关联。这项工作提出了一种用于应力监测的原位技术，在电池诊断和电池设计中具有潜在用途。
