期刊
SCIENCE ADVANCES
卷 6, 期 10, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.aaz3112
关键词
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资金
- National Natural Science Foundation of China [51722210, 51972285, U1802254, 51871201, 51677170]
- Natural Science Foundation of Zhejiang Province [LY16E070004, LD18E020003]
- National Research Foundation (NRF) of Singapore via the NRF Investigatorship [NRF-NRFI2016-04]
The lithium metal anode (LMA) is considered as a promising star for next-generation high-energy density batteries but is still hampered by the severe growth of uncontrollable lithium dendrites. Here, we design spansules made of NaMg(Mn)F-3@C core@shell microstructures as the matrix for the LMA, which can offer a long-lasting release of functional ions into the electrolyte. By the assistance of cryogenic transmission electron microscopy, we reveal that an in situ-formed metal layer and a unique LiF-involved bilayer structure on the Li/electrolyte interface would be beneficial for effectively suppressing the growth of lithium dendrites. As a result, the spansule-modified anode affords a high Coulombic efficiency of 98% for over 1000 cycles at a current density of 2 mA cm(-2), which is the most stable LMA reported so far. When coupling this anode with the Li[Ni0.8Co0.1Mn0.1]O-2 cathode, the practical full cell further exhibits highly improved capacity retention after 500 cycles.
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