Effects of Sulfur-Containing Additives on Properties of 8 μm Electrolytic Copper Foil for Li-ion Battery
The effects of brightening agent,such as polysodium dithiodipropanesulfonate(SPS)and sodium 3-mercapto-1-propanesulfonate(MPS),on electrodeposition of Cu from electrolyte with Cu2+,H2 SO4,Cl-concentration of 85 g/L,100 g/L and 20 mg/L respectively were studied by adopting linear scanning voltammetry and cyclic voltammetric stripping(CVS),and the effects of SPS and MPS on the tensile strength,elongation,glossiness and roughness of electrolytic copper foil for Li-ion batteries were discussed.The results show that SPS and MPS can promote copper electrodeposition,and also SPS is better than MPS in promotion.However,the compounding with collagen and hydroxyethylcellulose will result in less promotion of copper electrodeposition.In addition,SPS is conducive to improving the tensile strength of copper foil,and MPS is conducive to improving the elongation of copper foil.With concentration of SPS and MPS at 1 mg/L and 1.5 mg/L respectively,the prepared copper foil has flat and dense surface,with better glossiness and roughness.
copper foil of Li-ion batteryelectrolytic copper foilsulfur-containing additivescollagenglossinessroughnessbrightening agentslithium-ion battery
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