Synthesis and application of imidazole derivative monomer for lithium surface coating
By substituting groups into 1-phenyl-3-vinylimidazole, imidazole derivative monomers were prepared and polymer protective films were formed, solving the problems of lithium dendrite growth and easy breakage of SEI films, and realizing the high efficiency and cycle stability of lithium metal batteries and the feasibility of industrial production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-03
- Publication Date
- 2026-07-17
AI Technical Summary
In the existing technology, the substitution modification of 1-phenyl-3-vinylimidazolium is mainly concentrated in the fields of electroluminescence and ionic liquids. The synthesis methods have harsh reaction conditions, low product yield and poor purity, which cannot meet the application requirements of lithium metal batteries. In addition, lithium dendrite growth and SEI film rupture lead to poor battery cycle stability.
By substituting specific groups into 1-phenyl-3-vinylimidazole, a monomer containing polymerizable double bonds was prepared. The reaction was carried out in two steps, N-arylation and N-vinylation, under nitrogen protection. The molar ratio of reactants and the type of catalyst were optimized to form a polymer protective film (PBM film) to improve the compatibility of lithium metal interface.
The prepared imidazole derivative monomers have strong adhesion to the lithium metal surface, and the polymer film has good ionic conductivity and mechanical strength, effectively inhibiting lithium dendrite growth and improving battery cycle stability. The synthesis method is mild, with high yield and high purity, making it suitable for industrial production.