Decoding Chemo‐Mechanical Failure Mechanisms of Solid‐State Lithium Metal Battery Under Low Stack Pressure via Optical Fiber Sensors
All solid-state lithium (Li) metal batteries (ASSLBs) using ceramic-polymer hybrid solid electrolytes hold the promise for high-performance energy storage application, but they still suffer from the interfacial deterioration and dendritic Li penetration issues, particularly under low stack pressures. Therefore, understanding and mastering the underlying chemo-mechanical failure mechanisms become essential. Herein, the chemo-mechanical evolutions by operando monitoring the amplitude and heterogeneity of interfacial stress through an embedded optical fiber sensor are revealed. It is found that the uneven stripping/deposition of Li metal induces rapid and non-uniform stress growth at the interface, deteriorating interfacial contact with the Li-filament growth. Based on these insights, Li metal is replaced with an architectural lithium-tin anode, which demonstrates uniform stress and improved performance even under low stack pressure. This work not only offers a quantitative way to operando track the uniformity of interfacial stress but also provides critical insights into mastering the chemo-mechanics of ASSLBs.
Authors
- Zheng‐Long Xu (ORCID: https://orcid.org/0000-0002-8483-0532)
- Xibin Lu (ORCID: https://orcid.org/0000-0002-3789-9350)
- Canbin Deng
- Yoonseob Kim (ORCID: https://orcid.org/0000-0002-6892-8281)
- Jiayue Tang (ORCID: https://orcid.org/0000-0001-7647-2918)
- Yi Xie (ORCID: https://orcid.org/0000-0002-1416-5557)
- Xiaobin Hui (ORCID: https://orcid.org/0000-0001-9513-3188)
- Mingtao Liu (ORCID: https://orcid.org/0000-0002-8951-8361)
- Jiaqiang Huang (ORCID: https://orcid.org/0000-0001-8250-228X)
- Guocheng Li (ORCID: https://orcid.org/0009-0008-7556-267X)
- Jingya Yu (ORCID: https://orcid.org/0000-0003-4343-4776)
- Taolue Zhang
Institutions
- Hong Kong Polytechnic University (HK)
- Yangtze University (CN)
- Hong Kong University of Science and Technology (HK)
- HKUST Shenzhen Research Institute (CN)
- University of Hong Kong (HK)
Publication Details
- Journal
- Advanced Materials
- Published
- 2025-05-15
- DOI
- https://doi.org/10.1002/adma.202417770
- Citations
- 7
- Primary Topic
- Advancements in Battery Materials
- Type
- article
- Field-Weighted Citation Impact
- 5.11
Funders
- National Natural Science Foundation of China
- Hong Kong Polytechnic University
- Hong Kong University of Science and Technology
- Banting and Best Diabetes Centre, University of Toronto
- Department of Industrial and Systems Engineering, Hong Kong Polytechnic University
- Guangzhou Municipal Science and Technology Project
- National Key Research and Development Program of China