期刊
ACS APPLIED MATERIALS & INTERFACES
卷 -, 期 -, 页码 -出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.3c05840
关键词
in situ polymerization; gel polymer electrolytes; lithium metal batteries; high voltage; fluorinated
Rechargeable lithium metal batteries (LMBs) show promise for high-energy-density battery systems. Fluorinated solvents were used to prepare gel polymer electrolytes (FGPE) that are compatible with both the lithium metal anode and LiNi0.8Co0.1Mn0.1O2 cathode. FGPE demonstrated stable plating/stripping processes and sufficient safety. This electrolyte design provides ideas to enhance the safety and energy density of LMBs.
Rechargeablelithium metal batteries (LMBs) offer excellent opportunitiesfor applications requiring high-energy-density battery systems. Sofar, it has received a lot of interest in pairing higher-energy-densityhigh-voltage nickel-rich cathodes. Here, fluorinated solvents wereused instead of the usual carbonate solvents to prepare gel polymerelectrolytes (FGPE) by in situ polymerization of polymers introducingthe fluorine-containing groups. Theoretically and experimentally,FGPE has proven to be ultra-compatible with the lithium metal anodeand LiNi0.8Co0.1Mn0.1O2 cathode. A stable plating/stripping process of over 2000 h can beachieved for symmetrical lithium cells using FGPE. The Li||FGPE||NCM811cell has a longer cycle life at a high voltage (4.5 V). In addition,the zero self-extinguishing time indicates that the FGPE has sufficientsafety. In summary, the design of this electrolyte provides ideasto improve the safety and energy density of LMBs.
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