期刊
ADVANCED MATERIALS
卷 31, 期 3, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201806470
关键词
dendrite suppression; interface modification; Li-metal anodes; quenching method; solid electrolyte interphase
类别
资金
- National Natural Science Foundation of China [51772272, 51502263, 51728204]
- Fundamental Research Funds for the Central Universities [2018QNA4011]
- Qianjiang Talents Plan D [QJD1602029]
- Startup Foundation for Hundred-Talent Program of Zhejiang University
- Program for Innovative Research Team in University of Ministry of Education of China [IRT13037]
Uncontrollable growth of Li dendrites and low utilization of active Li severely hinder its practical application. Construction of an artificial solid electrolyte interphase (SEI) on Li is demonstrated as one of the most effective ways to circumvent the above problems. Herein, a novel spray quenching method is developed in situ to fabricate an organic-inorganic composite SEI on Li metal. By spray quenching molten Li in a modified ether-based solution, a homogeneous and dense SEI consisting of organic matrix embedded with inorganic LiF and Li3N nanocrystallines (denoted as OIFN) is constructed on Li metal. Arising from high ionic conductivity and strong mechanical stability, the OIFN can not only effectively minimize the corrosion reaction of Li, but also greatly suppresses the dendrite growth. Accordingly, the OIFN-Li anode presents prominent electrochemical performance with an enhanced Coulombic efficiency of 98.15% for 200 cycles and a small hysteresis of <450 mV even at ultrahigh current density up to 10 mA cm(-2). More importantly, during the full cell test with limited Li source, a high utilization of Li up to 40.5% is achieved for the OIFN-Li anode. The work provides a brand-new route to fabricate advanced SEI on alkali metal for high-performance alkali-metal batteries.
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