期刊
ADVANCED FUNCTIONAL MATERIALS
卷 31, 期 18, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202009925
关键词
battery failure; critical current density; dendrites; Li kinetics; Li metal anodes; solid‐ state batteries; standards
类别
资金
- National Natural Science Foundation of China [22075029, 21805161, 21808124, 21825501, U1801257]
- National Key Research and Development Program [2016YFA0202500]
- Beijing Municipal Natural Science Foundation [Z20J00043]
- China Postdoctoral Science Foundation [2019M660659, BX20190168]
- Shuimu Tsinghua Scholar Program
- Tsinghua University Initiative Scientific Research Program
Solid-state lithium metal batteries have gained attention for their improved safety and high energy density, but issues such as dendrite-induced short circuits and contact-loss-induced high impedance hinder practical applications. The critical current density (CCD) is crucial for SSLMBs and future research should focus on strategies to enhance CCD for practical use.
Solid-state lithium (Li) metal batteries (SSLMBs) have become a research hotspot in the energy storage field due to the much-enhanced safety and high energy density. However, the SSLMBs suffer from failures including dendrite-induced short circuits and contact-loss-induced high impedance, which are highly related to the Li plating/stripping kinetics and hinder the practical application of SSLMBs. The maximum endurable current density of lithium battery cycling without cell failure in SSLMB is generally defined as critical current density (CCD). Therefore, CCD is an important parameter for the application of SSLMBs, which can help to determine the rate-determining steps of Li kinetics in solid-state batteries. Herein, the theoretical and practical meanings for CCD from the fundamental thermodynamic and kinetic principles, failure mechanisms, CCD identifications, and influence factors for improving CCD performances are systematically reviewed. Based on these fundamental understandings, a series of strategies and outlooks for future researches on SSLMB are presented, endeavoring on increasing CCD for practical SSLMBs.
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