The invention relates to the technical field of
electrochemistry, in particular to a
phosphorus-containing ureido
pyrimidone monomer and a preparation method thereof, a gel
electrolyte and a
lithium battery. The
phosphorus-containing ureido
pyrimidone monomer is prepared by the following steps: reacting a
phosphorus-containing hydroxyl compound with a diisocyanate compound to generate a phosphorus-containing
isocyanate intermediate, reacting the phosphorus-containing
isocyanate intermediate with a 2-amino-4-hydroxypyrimidine derivative to generate a
urea intermediate, and reacting the
urea intermediate with an acrylic anhydride compound. According to the phosphorus-containing ureido
pyrimidone monomer, a dynamic self-repairing unit and a
flame-retardant unit are integrated into the monomer from a molecular source, so that the monomer molecule has a
flame-retardant function and a self-repairing function. The raw materials of the gel
electrolyte comprise the phosphorus-containing ureido pyrimidone monomer, the gel
electrolyte is prepared in the
lithium battery through constant-
temperature gradient boosting curing, the
lithium battery is obtained, the gel electrolyte has good
flame retardance and self-repairing performance, and the
lithium battery has good
conductivity, cycle performance and safety.