期刊
SMALL METHODS
卷 6, 期 12, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smtd.202201114
关键词
in situ polymerization; robust-flexible polymeric electrolytes; ultrathin nanofibrous films; Li metal batteries; diffusion coefficients
资金
- National Natural Science Foundation of China [51873011]
- National Key R&D Program of China [2020YFC1910201]
- Shanghai Sailing Program [21YF1430100]
This study has achieved a novel ultrathin, robust-flexible polymeric electrolyte by in situ polymerization, which exhibits rapid ion transport and excellent cycling performance for lithium metal batteries.
Safety of lithium metal batteries (LMBs) has been improved by using the solid-state polymer electrolytes, but the performance of LMBs is still troubled by the poor interface of solid electrolytes/electrodes, leading to insufficient interfacial Li+ transport. Here, a novel ultrathin, robust-flexible polymeric electrolyte is achieved by in situ polymerization of 1,3-dioxolane in soft nanofibrous skeleton at room temperature without any extra initiator or plasticizer, leading to the electrolyte with rapid interfacial ion transport. This facilitated Li+ transportation is demonstrated by molecular dynamics simulation. Consequently, the as-prepared electrolyte exhibits excellent cycling performance. The results indicate that the electrolyte works well in the LiFePO4//Li cell at elevated temperature up to 90 degrees C, and further matches with the high-voltage LiNi0.8Mn0.1Co0.1O2 cathode. This study provides an effective approach to constructing a practical polymeric electrolyte for fabrication of safe, high performance LMBs.
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