Lithium anode surface treatment method of lithium metal battery

Abstract

The invention discloses a lithium anode surface treatment method of a lithium metal battery and belongs to the technical field of lithium batteries. According to the method, a chemical method is adopted, and the method comprises the steps that 1, salts or esters as additives are dissolved into an organic solvent, and an electrolyte solution is prepared; 2, the electrolyte solution is reacted with a metal lithium sheet, so that a solid electrolyte protection layer is formed on the surface of the lithium sheet. The operation method is simple and convenient for large-scaled production and quantitative control; the solid electrolyte layer formed on the metal lithium surface in place can effectively inhibit generation of lithium dendrites, the loss of a lithium source is reduced, so that the coulombic efficiency of the whole battery is improved obviously under the condition without the additives, the stability and the high efficiency of a metal lithium anode are achieved in the long battery life process, and obvious effects on inhibiting the metal lithium dendrites and improving and keeping the high coulombic efficiency of the whole battery are achieved.

Description

technical field

[0001] The invention relates to a method for treating the surface of a metal lithium negative electrode of a lithium metal battery, and belongs to the technical field of lithium metal batteries. Background technique

[0002] The 21st century has entered the era of mobile life, and the demand for energy in the whole society has become higher, which has also promoted the rapid development of the energy storage field, especially battery energy storage. Since Sony Corporation developed the first generation of commercial lithium-ion batteries in the 1990s by using graphite anodes instead of metal anodes, lithium-ion batteries quickly occupied high-end mobile terminals with notebook computers, mobile phones, digital cameras and other electronic products as the main body. market. With the introduction of the national new energy strategy development strategy, the promotion and popularization of new energy vehicles nationwide will curb the exhaust pollution caused by...