Diaphragm for metal lithium battery, preparation method of diaphragm and corresponding metal lithium battery

The invention relates to a diaphragm for a metal lithium battery, a preparation method of the diaphragm and the corresponding metal lithium battery. The diaphragm comprises a base membrane and a coating, wherein the coating comprises a lithium-loving oxide capable of forming a lithium alloy with metal lithium through an in-situ electrochemical or chemical reaction and an inorganic solid electrolyte capable of reacting with the metal lithium. Through the specifically designed diaphragm design, the problem of non-uniform deposition of metal lithium in the lithium battery is solved, and the rate capability and the safety performance of the battery are further improved. When the fluorine-containing electrolyte is adopted in the lithium battery, the lithium battery has an extremely excellent safe and fast charging effect due to the combination of the coating and the fluorine-containing electrolyte. 本申请涉及一种金属锂电池用隔膜及其制备方法和相应的金属锂电池。本申请的隔膜包括基膜和涂层，其中所述涂层包括能与金属锂通过原位电化学或化学反应形成锂合金的亲锂氧化物和能与金属锂反应的无机固态电解质。通过本发明特定设计的隔膜设计，解决了锂