Electrolyte diaphragm with high safety and battery assembled by electrolyte diaphragm

The invention discloses an electrolyte diaphragm with high safety and a battery assembled by the electrolyte diaphragm, and the electrolyte diaphragm comprises the following raw materials: an imidazolium ionic liquid, a solvent and a high-molecular polymer in a mass ratio of (5-7): (1-4): (0.5-1.5). The raw materials adopted in the invention can be used for synthesizing the polymer electrolyte with ionic conductivity and diaphragm effect, the polymer electrolyte can be used as a diaphragm and an electrolyte to effectively replace an electrolyte in a liquid lithium ion battery, and compared with the electrolyte, the polymer electrolyte has higher safety; meanwhile, the dry-method positive electrode is formed by compounding a polymer coated positive electrode prepared by a dry-method technology and an aluminum foil of which the base coat is LMFP, so that the safety performance of the battery can be further ensured. The button cell formed by the invention utilizes dual safety of the positive electrode and the di