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Published on: March 8, 2020
Monitoring internal stress variation of solid-state batteries by fiber Bragg grating
Hui Pan1, Sixie Yang2, Haoshen Zhou1
1Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, P. R. China. pinghe@nju.edu.cn.
Abstract:
Fiber Bragg grating is utilized as an in situ stress sensor for two representative categories of solid-state electrodes. In the active material-only micron-Si electrode, a large stress variation of 63.9 MPa was detected due to the substantial volume change of Si. In addition, a staged stress change was recorded by FBG in the S composite solid-state electrode, which was undetectable by the load cell, indicating the necessity of the embedded stress sensor.

