High heat-resistant antioxidant solutions for lithium battery copper foil
The invention provides a high heat-resistant antioxidant solution for lithium battery copper foil, including hexavalent chromium and organic compounds containing heteroatoms, and the heteroatoms include N, O, S or P.
1 . A antioxidant solution for lithium battery copper foil, comprising:
hexavalent chromium; and
organic compounds containing heteroatoms, wherein the heteroatoms include N, O, S or P,
wherein based on a total weight of the antioxidant solution for the lithium battery copper foil, a content of the hexavalent chromium is 50 ppm to 1500 ppm, and a content of the organic compounds containing heteroatoms is 3000 ppm to 60000 ppm,
wherein the organic compounds containing heteroatoms include 2-thiol benzotriazole, nitrogen-containing azoles, hydroxyethylene diphosphate, aminotrimethylenephosphonic acid, sodium ethylenediamine tetramethylenephosphate, ethanol diamine tetraacetic acid, sodium gluconate, sodium potassium tartrate or water-soluble siloxane.
2 . The antioxidant solution for lithium battery copper foil according to claim 1 , wherein a source of the hexavalent chromium includes chromium trioxide, chromates and dichromates.
3 . The antioxidant solution for lithium battery copper foil according to claim 1 , wherein the nitrogen-containing azoles include aminotriazole or aminotetrazole.