Revealing Failure Mechanisms of Energy Storage Devices

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Relaxation and Failure Mechanisms of Energy Storage Devices

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Surface science approach exposes relaxation and failure systems of energy storage gadgets. Credit: DICP

Long cycle life and high security are needed for energy storage gadgets (ESDs) in their massive applications. Therefore, it is necessary to check out both the operating and failure systems of ESDs.

Previous characterization methods such as X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray spectroscopy and topography, and nuclear magnetic resonance (NMR) were based upon bulk areas of electrodes or electrolytes, and they ignored the important surface/interface habits that govern the operation and failure in ESDs.

Recently, a research study group led byProf FU Qiang from the Dalian Institute of Chemical Physics ( DICP) of the Chinese Academy of Sciences (CAS) exposed the atmosphere-dependent relaxation and failure systems of ESDs by in situ surface area science approach.

The outcomes were just recently released in Journal of the American Chemical Society

The scientists imagined atmosphere-dependent relaxation and failure procedures in ESDs by in situ Raman, X-Ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS).

They discovered that for aluminum ion battery (AIB), the relaxation results of the graphite electrode in anhydrous environments appeared by recoverable stage-structure modification and electronic relaxation. The systems might be referred to as the redistribution of the anion/cation sets within graphite electrode by in situ XPS.

Once direct exposure to hydrous environments, H 2 O particles from ambient might intercalate into the graphite electrode and hydrolysis responses might be caused in between recently intercalated H 2 O and ions. After H 2 O intercalation and hydrolysis, the failure habits of the graphite electrode took place as revealed by the stage-structure destruction and electronic decoupling.

“We have developed the atmosphere-, temperature- and potential- controlled operando/in situ surface/interface techniques and well-defined model devices,” statedProf FU. “Such methods can be extended to explore the relaxation and failure mechanisms of more ESDs, such as metal-ion secondary batteries/supercapacitors, and the interface reactions in metal-gas batteries.”

Reference: “In Situ Visualization of Atmosphere-Dependent Relaxation and Failure in Energy Storage Electrodes” by Chao Wang, Caixia Meng, Shiwen Li, Guohui Zhang, Yanxiao Ning and Qiang Fu, 13 October 2021, Journal of the American Chemical Society
DOI: 10.1021/ jacs.1 c09429

This work was supported by the National Natural Science Foundation of China, the National Key R&D Program of China, the Strategic Priority Research Program of CAS, and the DICP&QIBEBT financing.



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