Towards durable practical lithium–metal batteries: advancing the feasibility of poly-DOL-based quasi-solid-state electrolytes via a novel nitrate-based additive

Abstract

TEGDN-QSSE could form a N-rich SEI on the surface of a Li metal anode, protecting it from parasitic reactions and preventing Li dendrites. A pouch-type Li–S cell with TEGDN-QSSE could stably cycle 50 times.

High-flux charge transfer layer confers a solid electrolyte interphase with uniform and rich LiF for stable lithium metal batteries

“…The ion transference number ( t Li + ) was determined using the Bruce–Vincent method from the chronoamperometric curves and electrochemical impedance curves. 36 A high t Li + generally suggests that both the anion and cation can quickly reach the corresponding electrode interface, which is desirable for the stripping/deposition. GrGO/CNT film delivered a t Li + of 0.33, which was higher than that of the pure Li system ( t Li + = 0.29), demonstrating an enhancement of Li + transmission at the interface (Fig.…”

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

“…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.…”

In Situ Solid-State DETFPi-PDOL Electrolyte and Its Impact on the Interfaces and Performance of NCM811||Li Batteries

“…24 Guo and co-workers 25 and realized over 700 cycles of LiFePO 4 ||Li battery. Ciucci and co-workers 26 introduced a triethylene glycol dinitrate additive into this system and constructed an SEI layer rich in LiN 3 on the anode surface, suppressing the generation of lithium dendrites and thus improving the cycling stability of LiFePO 4 || Li battery. However, PDOL lacks sufficient oxidation resistance, and its interfacial compatibility with high-voltage cathodes (cutoff voltage ≥4.2 V, such as NCM cathode) is poor.…”

“…Guo and co-workers first reported PDOL quasi-solid-state electrolyte, prepared through in situ gelation of DOL/DME electrolyte solution induced by LiPF 6 and realized over 700 cycles of LiFePO 4 ||Li battery. Ciucci and co-workers introduced a triethylene glycol dinitrate additive into this system and constructed an SEI layer rich in LiN 3 on the anode surface, suppressing the generation of lithium dendrites and thus improving the cycling stability of LiFePO 4 ||Li battery.…”