期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 40, 页码 13206-13210出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201808154
关键词
batteries; energy storage; lithium dendrites; nanoelectrochemistry; solid-electrolyte interphases
资金
- ALCA-SPRING of JST
- MEXT
Lithium (Li) dendrite formation is one of the major hurdles limiting the development of Li-metal batteries, including Li-O-2 batteries. Herein, we report the first observation of the dendrite-free epitaxial growth of a Li metal up to 10-m thick during charging (plating) in the LiBr-LiNO3 dual anion electrolyte under O-2 atmosphere. This phenomenon is due to the formation of an ultrathin and homogeneous Li2O-rich solid-electrolyte interphase (SEI) layer in the preceding discharge (stripping) process, where the corrosive nature of Br- seems to give rise to remove the original incompact passivation layer and NO3- oxidizes (passivates) the freshly formed Li surface to prevent further reactions with the electrolyte. Such reactions keep the SEI thin (<100 nm) and facilitates the electropolishing effect and gets ready for the epitaxial electroplating of Li in the following charge process.
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