The invention relates to a preparation method of an ultra-thin double-sided photoelectronic
copper foil and the prepared
copper foil. The method comprises the following steps of: adding
alkylphenol polyoxyethylene ether sodium sulfonate, 1,3-
thiazolidine-2-one and collagen in deionized water and dissolving to obtain an additive solution for ultra-thin
copper foil production; under the condition of a copper sulphate
electrolyte at a temperature of 20-90 DEG C, adding 5.0-10.0L of the additive solution in per
cubic metre of the
electrolyte per hour, uniformly stirring and then enabling the
electrolyte to enter an electrolytic bath; and electrolysing the electrolyte in the electrolytic bath under an electrolytic
current density of 2000-6000A / m<2>, and carrying out an electrochemical reaction to generate the ultra-thin double-sided photoelectronic
copper foil. The ultra-thin double-sided photoelectronic
copper foil manufactured by the process disclosed by the invention has the following performance: the thickness is small and uniform, the roughness of a
rough surface is moderate and uniform, the two sides of the
copper foil are smooth and bright, the
surface tension of the copper foil is high, the
adhesion force of
lithium-
ion negative
electrode active materials can be effectively increased, the
electric capacity and charge-
discharge times of a battery are increased, and the service life of the battery is prolonged.