Lithium metal batteries with in situ copolymerized fluorinated polyether electrolytes

Abstract

Ether electrolytes are an important component of lithium metal batteries. However, the safety hazards of liquid solvent leakage and combustion, as well as the relatively narrow electrochemical stabilization window are...

In Situ Polymerization Derived from PAN-Based Porous Membrane Realizing Double-Stabilized Interface and High Ionic Conductivity for Lithium-Metal Batteries

“…32−34 Particularly, poly(1,3-dioxolane) (PDOL) obtained via simple ring-opening polymerization of 1,3-dioxolane (DOL) does not need the injection of additional initiators, thus gaining more concerns. 35,36 Also, the flexible organic layer formed by DOL polymerization contributes to accommodate the rapid volume change in Li electrode cycling. 37−39 Inspired by the simple fabrication of in situ PDOL and the flexible PDOL-filled feature, 40 we herein adopt an in situ polymerization strategy to construct double-stabilized PDOL interface layers between PAN-containing SN and LLZTO and cathode/anode.…”

“…In situ polymerization is a promising strategy for achieving low interfacial resistance and high ion conductivity. − It has been demonstrated that in situ processed polymers including poly­(methyl methacrylate) (PMMA), poly­(vinylene carbonate) (PVC), poly­(tetrahydrofuran) (PTHF), and poly­(1,3-dioxolane) (PDOL) can fill the gaps between electrolytes and electrodes, thus achieving a tight interfacial contact. − Particularly, poly­(1,3-dioxolane) (PDOL) obtained via simple ring-opening polymerization of 1,3-dioxolane (DOL) does not need the injection of additional initiators, thus gaining more concerns. , Also, the flexible organic layer formed by DOL polymerization contributes to accommodate the rapid volume change in Li electrode cycling. − Inspired by the simple fabrication of in situ PDOL and the flexible PDOL-filled feature, we herein adopt an in situ polymerization strategy to construct double-stabilized PDOL interface layers between PAN-containing SN and LLZTO and cathode/anode. Such fabricated composite electrolytes are demonstrated to greatly suppress the passivation reaction of PAN/Li and simultaneously guarantee Li + migration, finally realizing superior battery performance.…”