Summary:

The invention provides a method for electrochemically and efficiently preparing a composite cathode lithium-supplemented material, the composite cathode lithium-supplemented material comprises an organic lithium-supplemented material and a catalyst, and the method comprises: taking a catalyst as an active material and preparing a working electrode, becoming a counter-electrode with lithium metal, adding an electrolyte, assembling a battery, discharging the battery in a CO2 atmosphere, generating an organic lithium-supplementing material in situ on the surface of the catalyst with the help of an electrochemical reaction, and preparing a composite cathode lithium-supplementing material, wherein the cut-off potential of discharge is 1.0- 2.0V。 The invention makes the organic lithium supplement material generated on the surface of the catalyst in situ by electrochemical method, so that the composite cathode lithium supplement material that is highly combined with the catalyst and the organic lithium supplement material can be synthesized in a simple way, so that the contact between the catalyst and the lithium supplement material is good, so that the decomposition potential of the organic lithium supplement material into active lithium can be effectively reduced while increasing the charge-discharge capacity of the battery.

Link: http://epub.cnipa.gov.cn/patent/CN114497549A?8kt2YOWWXQBD=1667819717996