METHOD FOR CHEMICAL TREATMENT OF ANODES BASED ON NON-GRAPHITIZED CARBON AND ANODES CHEMICALLY TREATED USING THIS METHOD BASED ON NON-GRAPHITIZED CARBON FOR POTASSIUM-ION BATTERIES Russian patent published in 2021 - IPC H01M10/54 H01M4/587 H01M4/1393 

FIELD: physical chemistry.

SUBSTANCE: invention relates to a method for chemical treatment of anodes of metal-ion batteries based on the active material of non-graphitized carbon in order to saturate them with alkali metals such as potassium, more specifically, anodes for potassium-ion batteries. The implementation of chemical treatment for potassium processing of carbon anodes includes the production of a solution containing potassium, naphthalene and an organic solvent. Carbon anodes are immersed in such a solution for 5 minutes to 75 hours at a temperature of 20°C to 60°C. The use of anodes chemically processed with potassium provides an additional source of potassium in the potassium-ion electrochemical cell, which is consumed to saturate the irreversible capacity inherent in the carbon anode material, preventing potassium loss from the cathode material. At the same time, the technology of assembling potassium-ion battery cells is greatly simplified.

EFFECT: increasing the Coulomb efficiency during the first discharge/recharge cycles, reducing irreversible losses of potassium ions in the battery and ensuring stable operation of the potassium-ion electrochemical system.

11 cl, 1 tbl, 4 dwg, 6 ex