期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 18, 页码 5936-5940出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201900105
关键词
9,10-dimethylanthracene; dendritic lithium; fluorescence probing; lithium batteries
资金
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA22000000]
- National Natural Science Foundation for Distinguished Young Scholars of China [51625204]
- Youth Innovation Promotion Association of CAS [2016193]
- Key Research and Development Plan of Shandong Province P. R. China [2018GGX104016]
- National Key R&D Program of China [2018YFB0104300]
- National Natural Science Foundation of China [U1706229]
- Key Program of the Chinese Academy of Sciences [KFZD-SW-414]
The uncontrollable growth of Li dendrites and the accumulation of byproducts are two severe concerns for lithium metal batteries, which leads to safety hazards and a low Coulombic efficiency. To investigate the deterioration of the cell, it is important to figure out the distribution of active Li species on the anode surface and distinguish Li dendrites from byproducts. However, it is still challenging to identify these issues by conventional visual observation methods. In this work, we introduce a novel fluorescent probing strategy using 9,10-dimethylanthracene (DMA). By marking the cycled Li-anode surface, the active Li distribution can be visualized by the fluorescence quenching of DMA reacting with active Li. The method demonstrates validity for electrolyte selection and predictive detection of uneven Li deposition on Li metal anodes. Furthermore, the location of dendrites can be clearly identified after destructive utilization of the anode, which will contribute to the development of failure-analysis technology for Li metal batteries.
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