High safety solid-state lithium battery based on ion gel interfacial layer
By constructing an ion gel interface layer containing cyclic carbonate-based methacrylate compounds and phosphorus- and fluorine-containing bifunctionalized polyethers inside the electrode core, the problems of wetting and interface adhesion inside the electrode core are solved, thereby improving the stability and safety of high-safety solid-state lithium batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ANHUI LIYUAN NEW ENERGY CO LTD
- Filing Date
- 2026-06-05
- Publication Date
- 2026-07-14
AI Technical Summary
Existing high-safety solid-state lithium batteries have difficulty simultaneously achieving deep wetting of the electrode sheet, in-situ construction of the interface, and continuous adhesion during cycling within the electrode core. This results in micro-gap residue, increased interface impedance, and contact degradation. At the same time, the migration of functional additives leads to performance degradation.
By employing a molecular-level synergistic design of methacrylate compounds containing cyclic carbonate groups and phosphorus- and fluorine-containing bifunctional polyethers, an ion gel interface layer is constructed inside the electrode core through in-situ crosslinking polymerization. This forms a three-dimensional gel network coupled with hydrogen bond networks and high-dielectric cyclic carbonate groups, achieving conformal coating and dense adhesion of the gel to the active particles.
It improves ionic conductivity and interfacial adhesion, reduces interfacial impedance, suppresses lithium dendrite nucleation and blocks thermal runaway, thereby improving the long-term stability and safety of the battery.
Smart Images
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