Metal lithium battery and preparation method thereof

The invention provides a metal lithium battery and a preparation method thereof.The metal lithium battery comprises a carbon fluoride positive pole piece, a metal lithium negative pole piece and a diaphragm arranged between the carbon fluoride positive pole piece and the metal lithium negative pole piece, and the liquid injection coefficient of the metal lithium battery is 0.7-1.2 g/Ah. The metal lithium battery is low in electrolyte injection amount and high in reliability; the energy density is high; and the safety is high. 本发明提供了一种金属锂电池及其制备方法，所述金属锂电池包括氟化碳正极极片、金属锂负极极片和设置于所述氟化碳正极极片和金属锂负极极片之间的隔膜，所述金属锂电池的注液系数为0.7～1.2g/Ah，本发明所述金属锂电池的电解液注液量低，能量密度高且安全性高。