Recent advances in acoustic diagnostics for electrochemical power systems

Jude Majasan, James B Robinson, Rhodri E Owen, Maximilian Maier, Anand N P Radhakrishnan, Martin Pham, Thomas G Tranter, Yeshui Zhang, Paul Shearing, Dan Brett*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Over the last decade, acoustic methods, including acoustic emission (AE) and ultrasonic testing (UT), have been increasingly deployed for process diagnostics and health monitoring of electrochemical power devices, including batteries, fuel cells, and water electrolysers. These techniques are non-invasive, highly sensitive, and low-cost, providing a high level of spatial and temporal resolution and practicality. Their application in electrochemical devices is based on identifying changes in acoustic signals emitted from or propagated through materials as a result of physical, structural, and electrochemical changes within the material. These changes in acoustic signals are then correlated to critical processes and the health status of these devices. This review summarises progress in the use of acoustic methods for the process and health monitoring of major electrochemical energy conversion and storage devices. First, the fundamental principles of AE and UT are introduced, and then the application of these acoustic techniques to electrochemical power devices are discussed. Conclusions and perspectives on some of the key challenges and potential commercial and academic applications of the devices are highlighted. It is expected that, with further developments, acoustic techniques will form a key part of the suite of diagnostic techniques routinely used to monitor electrochemical devices across various processes, including fabrication, post-mortem examination and recycle decision support to aid the deployment of these devices in increasingly demanding applications.
Original languageEnglish
Article number032011
Number of pages29
JournalJPhys Energy
Volume3
Issue number3
Early online date8 Jun 2021
DOIs
Publication statusPublished - 31 Jul 2021

Keywords

  • acoustic emission
  • ultrasonic testing
  • lithium-ion battery
  • fuel cell
  • water electrolyser
  • acoustic time-of-flight
  • amplitude

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