Summary:

The present invention relates to a lithium metal battery electrolyte containing aromatic compounds as diluents, and belongs to the technical field of lithium metal batteries. The electrolyte contains a lithium salt, a solvent dissolving lithium salt and a diluent, and the diluent is an aromatic compound; The diluent is used for inhibiting the lithium dendrites produced by the lithium metal anode in the lithium metal battery due to the uneven deposition during the cycling process, and is used for inhibiting the reaction of the lithium metal anode in the lithium metal battery with the electrolyte. The present invention dilutes the high-concentration lithium salt electrolyte by adding aromatic diluent, thereby improving the solvation structure of the lithium salt in the electrolyte to accelerate the transmission of lithium ions, reducing the degree of uneven local current density on the surface of lithium metal, homogenizing lithium metal deposition thereby inhibiting the growth of dendrites on the surface of lithium metal, and the electrolyte has high conductivity, low viscosity, good wettability, can effectively improve the coulombic efficiency of lithium metal battery, thereby greatly prolonging its cycle life.

Link: http://epub.cnipa.gov.cn/patent/CN110890592A