▎ 摘　　要

NOVELTY - An interface regulating liquid comprises solvent and metal salt. The solvent comprises one or more of ether solvent, ester solvent, ketone solvent, hydrocarbon solvent, nitrile solvent or deionized water. The metal salt comprises one or more of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium hexafluoroarsenate, lithium bis(oxalato) borate, lithium bis(fluorosulfonate) imide, lithium bis(trifluoromethylsulfonyl) imide, lithium perchlorate, lithium fluoride and lithium chloride. The concentration of metal salt is 0.001-10 g/mL. The pre-lithiation electrode is obtained by supplementing lithium to electrode using chemical pre-lithiation solution. The metal salt of interface regulating liquid reacts with chemical pre-lithiation solution remained on the surface of pre-lithiation electrode, and generating solid electrolyte layer containing inorganic lithium salt on the surface of the pre-lithiation electrode. The content of inorganic lithium salt is 5-90%. USE - Interface regulating liquid for pre-lithiation electrode used in lithium battery (claimed) used for 3C applications and electric automobile applications. ADVANTAGE - The interface regulating liquid has excellent mechanical performance and electrochemical stability, and effectively inhibits the lithium dendritic crystal growth and side reaction, avoids the electrochemical reaction between the electrode material inside the battery and the electrolyte, which is more beneficial for improving the cycle performance of the battery, and has stability to air. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: preparation of interface regulating liquid; and interface regulation of pre-lithiation electrode.