Application of benzoxazole compound probe in detection of lithium metal negative electrode

By using benzoxazole compound probes to perform fluorescence detection on the surface of lithium metal anodes, the problem of uncontrollable lithium dendrite growth was solved, enabling efficient and accurate visualization and semi-quantitative analysis, and providing early warning of battery performance degradation.

CN116660223BActive Publication Date: 2026-04-21TSINGHUA UNIVERSITY
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Patent Information

Application Number
CN202310577180.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-05-22
Publication Date
2026-04-21
Estimated Expiration
2043-05-22

AI Technical Summary

Technical Problem

The growth of lithium dendrites on the surface of the negative electrode of existing lithium metal batteries is uncontrollable, leading to SEI film damage, internal short circuits and safety hazards. There is a lack of effective visualization and quantitative detection methods.

Method used

Using benzoxazole compounds as probes, lithium deposition, lithium dendrites, byproducts, and SEI film were detected by fluorescence visualization through contact with the lithium metal anode surface and analysis under excitation light.

Benefits of technology

It enables visualization and semi-quantitative detection of the lithium metal anode surface, is simple and efficient, has wide applicability, and can accurately identify active lithium, lithium dendrites and their abundance and by-product accumulation, providing analysis and early warning of battery failure causes.

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Abstract

The application relates to application of a benzoxazole compound as a probe in detection of a lithium metal negative electrode. The benzoxazole compound has a structural formula shown in the following formula (1), wherein R1-R8 are each independently selected from one or more of a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aryl group, a heteroalkyl group, a heterocyclic group, a heteroaryl group, an amino group, a nitro group, a cyano group, an isocyano group, a halogen, an alkylene group, an alkenylene group, an alkynylene group, a formyl group and an ester group. The benzoxazole compound provided by the application can realize visual observation and semi-quantitative detection of the lithium metal negative electrode, and the detection process is simple, efficient, accurate, fast in response, good in stability and wide in applicability.
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