1945results about "Electroforming processes" patented technology

The invention provides a control method of composite copper foil thickness control equipment, which comprises the following steps: calculating the deposition thickness of each abnormal concentration group at a future moment according to a deposition rate change rule diagram to obtain the copper layer thickness distribution of an abnormal region, and comparing the copper layer thickness distribution of the abnormal region with the thickness distribution of a normal region to obtain the thickness distribution of the abnormal region. Calculating a thickness deviation value of the abnormal area; according to the thickness deviation value, a deviation compensation algorithm is adopted, electroplating process parameters of the abnormal area are adjusted according to the size and the sign of the deviation value, and the electroplating process parameters comprise the current density and the electrolyte flow speed; and according to the optimized electroplating process parameters, performing parameter setting and adjustment on a power supply system and an electrolyte circulation system of the composite copper foil thickness control equipment, so that the composite copper foil thickness control equipment performs production according to the optimized electroplating process parameters.

The invention provides a secondary battery, a preparation method thereof and an electric device. The secondary battery comprises a copper foil, the copper foil comprises copper crystal grains with different particle sizes, the copper crystal grains comprise copper crystal grains with the particle size smaller than or equal to 0.5 mu m and copper crystal grains with the particle size larger than 0.5 mu m, the number of the copper crystal grains with the particle size smaller than or equal to 0.5 mu m accounts for 70%-95% of the total number of the copper crystal grains, and the number of the copper crystal grains with the particle size larger than 0.5 mu m accounts for 10%-20% of the total number of the copper crystal grains. And the amount of the copper grains with the grain size larger than 0.5 mu m accounts for 5%-30% of the total amount of the copper grains. The current collector has excellent mechanical strength and plasticity.

The invention discloses a preparation method of a low-internal-resistance copper foil for a lithium ion battery, which comprises the following specific steps of: 1, grinding a titanium cathode roller by using a grinding wheel of 50-600 meshes, removing an oxide layer, foreign matter points and the like on the surface of the cathode roller, and grinding by using a grinding wheel of 1000-1500 meshes; 2, the cathode roller falls into an electrolytic bath provided with an anode plate, and copper sulfate electrolyte is introduced into the electrolytic bath; and 4, a direct-current power supply is switched on, the current density of the power supply is 60-70 A / dm < 2 >, copper foil is subjected to electrolytic deposition on the arc-shaped cathode roller surface according to the Faraday principle, then the copper foil is subjected to acid pickling, water washing and passivation, and the lithium battery copper foil with the low internal resistance is obtained. On one hand, the problems of coating wrinkling and tab collapse in the battery preparation process are solved, on the other hand, the safety problem caused by excessive internal resistance and heating in the battery using process of an existing copper foil serving as a current collector is solved, and the performance such as the energy density and the rate characteristic of the battery is improved.

The invention relates to the technical field of lithium ion batteries, in particular to a copper foil, a preparation method thereof, a negative electrode containing the copper foil and a lithium ion battery. The copper foil comprises ultra-fine grains and nano twin crystals, the average grain size is 0.2-0.4 mu m, the area weighted average grain size is 0.3-0.8 mu m, and the proportion of the nano twin crystals in the copper foil is larger than 50%. The copper foil is prepared through a pulse electroplating technology, and the technology can control the average grain size and the proportion of nano twin crystals in the copper foil, so that the copper foil has high tensile strength and high ductility. According to the preparation method of the copper foil, a specific electrolyte is adopted at the same time, the tensile strength of the copper foil can reach 600-900 MPa, and the ductility is larger than 5%. When the copper foil is applied to the lithium ion battery, the volume expansion rate of a negative electrode material after charge-discharge circulation can be reduced, copper foil breakage caused by repeated volume change of the negative electrode material in the charge-discharge process is prevented, the cycle life of the battery is prolonged, and the safety of the battery is improved.

The invention provides a current collector, a pole piece, a secondary battery, an electric device, a copper foil and a preparation method of the copper foil. The current collector comprises a copper foil, the average particle size of crystal grains in the copper foil is 50-400 nm, and based on the total number of the crystal grains in the copper foil, the number ratio of the crystal grains of the nano twin crystals is larger than or equal to 60%. Under the combined action of the high-proportion nano twin crystal structure and the small grain size, the mechanical strength of the current collector is improved while the high plasticity of the current collector is maintained, and a material basis is provided for further improvement of the energy density and the safety of the battery.

The present invention belongs to the technical field of electrolytic copper foil. The present invention provides an electrolyte for ultra-thin electrolytic copper foil, in which the mass concentration of copper sulfate is 175-260 g / L, the mass concentration of inorganic acid is 80-100 g / L, the mass concentration of additive is 1-5 g / L, the mass concentration of complexing agent is 3-8 g / L, the mass concentration of conductive polymer is 0.5-3 g / L, and the mass concentration of hydrolyzed collagen is 0.1-0.5 g / L. The present invention also provides an ultra-thin electrolytic copper foil and a preparation method thereof. The present invention significantly reduces the thickness and roughness of the copper foil by controlling the components of the electrolyte and their concentrations and the electrodeposition process parameters, while improving the mechanical properties, antioxidant properties and electrochemical properties of the copper foil. The ultra-thin copper foil of the present invention can be produced continuously without tearing, achieving a double breakthrough in the ultra-thin thickness and mechanical properties of the copper foil.

Methods are proposed for manufacturing dendrite-resistant lithium metal electrodes suitable for incorporation into lithium metal batteries. In an embodiment, the method involves first electroplating a copper sheet onto a surface of a single crystal of silicon, the silicon being doped to form a p-type or an n-type semiconductor, and then further electroplating the copper sheet with lithium metal. The lithium-electroplated copper sheet thus manufactured provides a lithium electrode that is resistant to dendrite formation during cycling of lithium metal batteries when compared to conventionally manufactured lithium electrodes. Methods are further provided of manufacturing lithium sheets by directly electroplating lithium metal onto single crystals of doped silicon, the lithium sheets configured for incorporation into lithium metal electrodes that are resistant to dendrite formation during cycling of lithium metal batteries.

The invention provides a method for reducing electrolyte impurities based on copper foil production equipment, which comprises the following steps: identifying a pressure fluctuation abnormal region from a pressure time-frequency distribution map, taking the pressure fluctuation abnormal region as the input of a pre-constructed high-deposition region distribution model, outputting to obtain the position distribution of the high-deposition region, and determining potential high-risk nodes of impurity deposition in a pipeline; according to the determined potential high-risk node of impurity deposition in the pipeline, a filtering device is deployed at the potential high-risk node of impurity deposition, impurity particle size separation is carried out through a multi-stage filtering structure arranged in the filtering device, separated impurities with different particle sizes are directionally collected, and impurity data are obtained.

The invention belongs to the technical field of electrolytic copper foils, and particularly relates to application of an additive for coarsening an electrolytic raw foil in coarsening the electrolytic raw foil, a coarsening solution and a preparation method of an electrolytic copper foil. The additive for coarsening the electrolytic raw foil, which is provided by the invention, is selected from one or more of 1-hydroxyethyl-3-methylimidazole polystyrene sulfonate, 1-butyl-3-methylimidazole polystyrene sulfonate, poly (1-butyl (3-hydroxyl)-3-methylimidazole chloride salt and guar gum. By introducing the polyion liquid, a large amount of uniform and fine nano-scale copper teeth can be generated on the rough surface of the copper foil, so that the specific surface area of the surface of the copper foil is increased, the high peel strength between the copper foil and a resin substrate is realized while the low profile tolerance is ensured, and the obtained copper foil has the properties of low surface roughness and high peel strength; and the performance requirements of high PCB transmission frequency, high speed and low loss under 5G communication can be met.

The invention relates to the technical field of batteries, in particular to a copper foil and a preparation method thereof, a current collector, a pole piece and an energy storage device. A connection degree gamma exists between the surface density of the copper foil and the size and arrangement of the through holes, the formula of the connection degree gamma is # imgabs0 #, and the value range of gamma is 1 + / -0.1; the copper foil is prepared through an electrolytic method, and an insulating acid-resistant coating is dispensed on the surface of a cathode of the electrolytic method to form an insulating acid-resistant layer; according to the electrolytic method, an active layer is formed on the surface of an anode by coating a mixed active substance solution and sintering, an inert substance is coated on the surface of the active layer opposite to a point coating position of a cathode to form an inert layer, and the range of the inert layer is smaller than 70% of the area of a pore region. The porous copper foil prepared by the method has a porous structure, the pore size distribution is more uniform, the size is consistent, meanwhile, the parts except the pores are dense copper layers, and the mechanical property of the material is good.

The invention discloses a component gradient iridium tantalum coating anode and a preparation method thereof, the component gradient iridium tantalum coating anode comprises a titanium-based bottom layer, a middle layer and a surface active layer structure with component gradient, and the middle layer and the active layer are both prepared through a thermal decomposition method. And the intermediate layer is prepared on the titanium substrate and is composed of TiO2 / Ta2O5 mixed oxide. The surface active layer is prepared on the outer side of the middle layer and comprises a plurality of layers of IrO2 / Ta2O5 oxide coatings with different iridium-tantalum proportions. Compared with a traditional uniform coating anode, the prepared component gradient iridium tantalum coating anode can relieve the stress concentration phenomenon and reduce coating cracking, the service life of the anode is remarkably prolonged, and the catalytic activity of the anode is remarkably improved; the modified carbon nano tube is added into the active layer precursor solution, so that the conductivity change caused by component gradient is improved, and the cell voltage of the component gradient iridium tantalum coating anode is effectively reduced; and moreover, the iridium content is lower, and the preparation cost of the electrode is reduced.

The invention discloses an automatic control device for a crude foil additive, and relates to the technical field of electrolytic copper foils. The device comprises a liquid preparation barrel, a liquid storage barrel, a control system, an online monitoring system and an electrolysis system, a feeding hopper is arranged above the liquid preparation barrel, and a stirring paddle is arranged in the liquid preparation barrel; the bottom of the liquid preparation barrel is connected with a liquid storage barrel; the liquid storage barrel is connected with the high-level tank through a pipeline; the high-level tank is connected with an electrolysis system through a pipeline; an additive is prepared through the liquid preparation barrel and stored in the liquid storage barrel, the online monitoring system monitors the technological parameter conditions of the additive in the liquid preparation barrel and the liquid storage barrel and transmits the monitored technological parameter information to the control system in a communication mode, and the control system controls and adjusts parameter data of the liquid preparation barrel and the liquid storage barrel after receiving an instruction. According to the invention, the effective concentration of the additive in the electrolyte can be fed back through the performance of the electrolytic copper foil, and different types of additives can be automatically added in real time according to the result, so that the required effective concentration of various additives in the electrolyte can be maintained.

Methods are proposed for manufacturing dendrite-resistant lithium metal electrodes suitable for incorporation into lithium metal batteries. In an embodiment, the method involves first electroplating a copper sheet onto a surface of a single crystal of silicon, the silicon being doped to form a p-type or an n-type semiconductor, and then further electroplating the copper sheet with lithium metal. The lithium-electroplated copper sheet thus manufactured provides a lithium electrode that is resistant to dendrite formation during cycling of lithium metal batteries when compared to conventionally manufactured lithium electrodes. Methods are further provided of manufacturing lithium sheets by directly electroplating lithium metal onto single crystals of doped silicon, the lithium sheets configured for incorporation into lithium metal electrodes that are resistant to dendrite formation during cycling of lithium metal batteries.

The invention relates to the technical field of photovoltaics, in particular to a photovoltaic electroforming screen printing plate and a preparing and forming process thereof. The preparation forming process of the photovoltaic electroforming screen printing plate comprises the following steps that S1, a base plate pattern is formed; s2, preparing an electroforming solution; and S3, the substrate is placed in the electroforming solution, and after electroforming integral forming is conducted, demolding treatment is conducted to obtain the photovoltaic electroforming screen printing plate. According to the preparation forming technology of the photovoltaic electroforming screen, the problems that an existing screen needs degreasing, wire drawing and repeated degreasing, the plate making technological process is complex, film typesetting is difficult, the plate making period is long, and the service life is short are solved, so that the preparation forming technology of the obtained photovoltaic electroforming screen is simple, the screen cloth straightness is high, film typesetting is easy, the production cost is low, and the production efficiency is high. And the yield and the wear resistance of the photovoltaic electroforming screen printing plate are improved.

The invention provides an electrolytic copper foil which is at least provided with a low-roughness surface, copper nodules on the low-roughness surface are rod-shaped protrusions and / or granular protrusions, the distance between every two adjacent protrusions ranges from 10 nm to 650 nm, the height of the copper nodules of the rod-shaped protrusions ranges from 300 nm to 800 nm, and the height of the copper nodules of the granular protrusions ranges from 80 nm to 250 nm. And the number of the rod-shaped bulge copper nodules and / or the granular bulges is 50-150 in every 25 mu m < 2 > of the area of the low-roughness surface. The invention further provides a preparation method and application of the electrolytic copper foil. The electrolytic copper foil provided by the invention has a low-roughness surface, so that the signal integrity of the copper foil substrate is improved, the problem of large signal transmission loss in the prior art is solved, the peeling strength between the copper foil and the substrate is improved, and the defect of insufficient peeling strength in the prior art is overcome.

Disclosed herein are a high-strength, high-elongation electrolytic copper foil and a manufacturing method therefor. The electrolytic copper foil has a tensile strength of 40 kgf / mm2 or greater at room temperature and ranges in elongation per unit thickness at room temperature from 1.3 to 2.0% / μm.

The invention provides a titanium anode, a titanium anode preparation method, an electrolytic copper foil and application. The titanium anode comprises a titanium substrate and a composite layer on the surface of the titanium substrate. The composite layer comprises a first active layer and a second active layer which are sequentially arranged on the titanium substrate, and the first active layer is arranged on the surface of the titanium substrate; wherein the first active layer includes an oxide of titanium and an oxide of tantalum, and the second active layer includes an oxide of tantalum, an oxide of iridium, and an oxide of cerium. The titanium anode provided by the invention has the characteristics of strong binding force, few cracks, high electrocatalytic activity, good uniformity, good erosion resistance and the like, and is beneficial to prolonging the service life.

The invention relates to a novel electrolytic copper foil and a preparation method thereof, a negative pole piece and a secondary battery. The novel electrolytic copper foil comprises at least one copper layer, at least part of the surface of the copper layer is provided with a through hole array, the through hole array is formed by arranging M * N through holes in M rows and N columns, the through holes in each row in the through hole array are arranged in the x direction, the through holes in each column in the through hole array are arranged in the y direction, the x direction and the y direction intersect and are located on the same plane, and the x direction and the y direction are perpendicular to each other. The surface area, covered by the through hole array, of the copper layer is an array area, the surface area, not covered by the through hole array, of the copper layer is a non-array area, and the weight of the array area per square meter meets a certain relational expression. The electrolytic copper foil can effectively solve the problem of lithium ion conduction of the traditional copper foil in a solid-state battery, and can effectively improve the performance of the battery, especially the solid-state battery as a battery cathode current collector.

To provide a surface treatment method of a copper foil, an antioxidant copper foil, and a cathode of a lithium battery.SOLUTION: An antioxidant copper foil includes a copper foil substrate and an antioxidant layer formed thereon. The antioxidant layer contains chromium elements derived from a chromic acid compound, and contains nitrogen elements at least partially derived from an aminotetrazole compound and a nitrogen-containing heterocyclic compound. The antioxidant copper foil satisfies the following characteristics: (a) the antioxidant layer has a chromium content of 5 μg / m2 to 35 μg / m2 determined by X-ray fluorescence analyzer (XRF); (b) the antioxidant layer has a nitrogen content of 0.1 to 10 mass% determined by X-ray photoelectron spectrometer (XPS); (c) the antioxidant layer has a C-N signal detected by headspace GC-MS; and (d) a color difference ΔE before and after baking the antioxidant copper foil at 250°C for 10 minutes is 8 or less.SELECTED DRAWING: Figure 3

The invention discloses a cathode roller with a honeycomb surface structure. A precise honeycomb micro-pattern structure is arranged on the surface of the cathode roller. The invention also discloses a method for manufacturing alloy foil by using the cathode roller, which comprises the following steps: dissolving ferric salt in ultrapure water to obtain a ferric salt solution; dissolving nickel salt in ultrapure water to obtain a nickel salt solution; mixing the two solutions and filtering; preparing various additive solutions, mixing all the additive solutions with the obtained iron-nickel solution to obtain an electrolyte, filtering the electrolyte, and transferring the filtered electrolyte into an electrolytic cell of a crude foil engine; and applying current to a cathode roller and an anode plate which are separately arranged in the electrolytic bath, electrically depositing iron and nickel on the surface of the cathode roller, and rolling through a roll-to-roll process to obtain the iron-nickel alloy foil. The alloy foil manufactured by the method has the characteristics of low surface roughness, high tensile strength and high ductility.

The invention discloses a preparation method of an ultra-thin copper foil with a carrier, and belongs to the technical field of copper foil manufacturing. The method comprises the steps that S1, a titanium plate is adopted as a cathode, an iridium-plated titanium plate is adopted as an anode, the washed titanium plate is immersed in a copper electroplating solution at the temperature of 30-70 DEG C, and after electro-deposition is conducted, a carrier copper foil is prepared; s2, immersing the carrier copper foil prepared in the step S1 into an organic solution containing ionic liquid for adsorption to obtain a carrier copper foil with a stripping layer; and S3, taking the carrier copper foil with the stripping layer prepared in the step S2 as a cathode, carrying out water washing treatment, then immersing the carrier copper foil into another copper electroplating solution at the temperature of 30-70 DEG C, and carrying out electro-deposition by taking an iridium-plated titanium plate as an anode, so as to prepare the ultra-thin copper foil. The ultrathin and uniform single organic stripping layer is prepared in an organic adsorption mode, the method is simple in preparation process, and the stripping layer enables the ultrathin copper foil to be stably and completely stripped from the carrier copper foil by regulating and controlling the binding force between the carrier copper foil and the ultrathin copper foil.

The invention provides an additive formula of a copper foil for a lithium ion battery and an electrolytic copper foil thereof. According to the formula, the tensile strength of the copper foil can be accurately regulated and controlled to 300-800 MPa. The formula comprises a brightening agent, a leveling agent, a displacement agent and a key component high-resistance agent, and is prepared from sodium dithiodipropane sulfonate (SPS), sodium 3-mercaptopropanesulfonate (MPS), hydroxyethyl cellulose (HEC), polyacrylamide (PAM), 2-mercaptobenzimidazole, chloride ions, polyethyleneimine and derivatives thereof, diethyl thiourea and thiazolidinethione-4-carboxylic acid (TTCA). The high-resistance agent is prepared from the following components: sodium dithiodipropane sulfonate (SPS), sodium 3-mercaptopropanesulfonate (MPS), hydroxyethyl cellulose (HEC), polyacrylamide (PAM), 2-mercaptobenzimidazole, chloride ions, polyethyleneimine and derivatives thereof, diethyl thiourea and thiazolidinethione-4-carboxylic acid (TTCA). By optimizing the formula, the tensile strength can be accurately adjusted only by adjusting the flow of the additive and the dosage of the high-resistance agent. The invention further relates to electrolysis parameters matched with the additive formula, so that the production requirements of copper foils with different specifications are met, and the mechanical property, the surface quality and the electrochemical property are improved.

The invention discloses a copper foil production system and method.The copper foil production system comprises an electrolytic bath and a cathode roller arranged in the electrolytic bath and further comprises a partition anode module, a partition cooling module, a detection module and a control system; the partitioned anode module comprises a plurality of anode assemblies which are arranged along the axial direction of the cathode roller, and an electric control module which is respectively connected with each anode assembly; the subarea cooling module comprises a plurality of cooling structures which are arranged in the cathode roller and are in one-to-one correspondence with the anode subareas, and a cooling control module which is respectively connected with each cooling structure; the control system is electrically connected with the electric control module, the cooling control module and the detection module. According to the method, differentiated cooperative control of partition current and cooling can be intelligently executed according to the source and size of supersaturation degree deviation, so that rapid directional compensation is performed at any axial position, and the defects of response lag and extensive regulation and control in a traditional mode are effectively overcome.

The invention belongs to the technical field of copper foils, and particularly relates to a production process of a copper foil and the copper foils, and the production process of the copper foils comprises the following steps: reacting a copper raw material with sulfuric acid to generate a copper sulfate solution; the copper sulfate solution is electrolyzed, and crude foil is obtained; the raw foil is subjected to surface treatment, the surface treatment comprises a roughening process, in the roughening process, a roughening solution comprises an additive C and an additive D, the additive C comprises one or a mixed solution of two or more of sodium tungstate, sodium molybdate, ammonium molybdate, tin sulfate and titanium sulfate, and the concentration of the additive C is 10-60 ppm; the additive D comprises high-molecular organic matters such as hydroxyethyl cellulose and ethylene glycol, and the concentration of the additive D is 30-50 ppm; and carrying out target temperature treatment on the crude foil subjected to the surface treatment to obtain the copper foil. Through the copper foil production process in the scheme, the peeling strength attenuation rate of the copper foil after high-temperature treatment can be reduced.

The present application relates to an electrolytic copper foil and a preparation method thereof and a lithium battery, wherein the electrolytic copper foil contains: a copper content ≥ 99.9wt%, a chlorine content of 100-200μg / g, and further contains: a gold content of 80-200μg / g, and a platinum content of 80-200μg / g. The electrolytic copper foil containing gold and platinum elements can improve the broken belt during the rolling process of lithium-ion batteries and the safety problems during the use of batteries, can improve the elongation, improve the process production efficiency and prevent the occurrence of safety accidents; at the same time, a small amount of gold and platinum is added for better conductivity, which improves the conductivity of the foil.

The invention relates to the technical field of electrolytic copper foil processing, printed circuit board processing and electrolytic copper foil, in particular to a preparation method of a bi-component stripping layer carrier copper foil and the bi-component stripping layer carrier copper foil. The preparation method provided by the invention comprises the following steps: preparing a carrier copper layer; preparing a first inorganic stripping layer on the smooth surface of the carrier copper layer through an electrochemical / physical vapor deposition method; preparing a second inorganic stripping layer on the surface of the first inorganic stripping layer through a low-temperature chemical vapor deposition method; preparing an ultra-thin copper layer on the surface of the second inorganic stripping layer through a pulse electrochemical deposition method; carrying out roughening treatment on the ultra-thin copper layer; and constructing a non-copper functional layer on the surface of the roughened ultra-thin copper layer, and carrying out silane coupling agent coating treatment to obtain the double-component stripping layer carrier copper foil. The two-component inorganic matter is used as the stripping layer of the carrier copper foil, the heat resistance of the stripping layer of the carrier copper foil is improved, and meanwhile the stability of the separating force between the ultra-thin copper layer and the carrier copper layer is improved.

The invention provides a preparation method of a porous copper foil with a regular polygonal hole array, which comprises the following steps of: grinding and polishing a titanium plate until the titanium plate is matte, punching holes with the regular polygonal hole array in the titanium plate by laser, finely trimming vertex angles of the regular polygonal holes by laser, and polishing and grinding the titanium plate to obtain the porous copper foil with the regular polygonal hole array. The method comprises the following steps: preparing a titanium plate, cleaning with pure water and alcohol to obtain a clean titanium plate, preparing a copper sulfate electrolyte, adding a proper amount of a brightener, a wetting agent and a high resistance agent into the electrolyte, mixing, pouring the mixed solution into an electrolytic bath, putting the clean titanium plate and a carbon plate into the electrolytic bath, and carrying out electrolytic foil generation by taking the titanium plate as a cathode and the carbon plate as an anode; and after foil generation is finished, the copper foil is stripped from the surface of the titanium plate, and the porous copper foil with the regular polygon holes is obtained. According to the method, the holes of the titanium plate are the regular polygon holes, and the vertex angles of the regular polygon holes are finely trimmed, so that the copper foil of the electrolytic raw foil is not easy to adhere to the titanium plate during stripping, and the production yield of the copper foil is further improved.

The invention discloses a preparation method of a 3-micron ultrathin lithium battery copper foil. The preparation method comprises the following steps: preparing a copper sulfate electrolyte; a wetting agent, a brightening agent and a high resistance agent are added into the copper sulfate electrolyte, the high resistance agent is at least one of thiazolidinethione, polyethyleneimine, 2-mercaptobenzimidazole and ethylene thiourea, and a mixed additive is formed; polishing and grinding a cathode roller by adopting a flying wing wheel, and carrying out electrolytic treatment on the mixed additive through the polished and ground cathode roller to obtain a first-stage copper foil; and the first-stage copper foil is placed in a nitrogen furnace to be subjected to annealing treatment, and the 3-micron ultrathin lithium battery copper foil is obtained. The invention aims to solve the technical problems that in the prior art, edge tearing, foil breaking, warping, dark appearance oxidation and the like are prone to occurring in the production process of the ultrathin copper foil, the tensile strength and the ductility are difficult to consider at the same time, and stable mass production of the 3-micron copper foil is still difficult.

The invention relates to the technical field of carrier copper foil, in particular to copper electrodeposition liquid and a carrier copper foil preparation method. The copper electrodeposition liquid comprises the following components: 20 g / L-100 g / L of phytic acid, 10 g / L-80 g / L of copper carbonate, 0.1 g / L-1 g / L of a tartaric acid additive and a solvent. And the pH value of the copper electrodeposition liquid is 0.5-3. According to the invention, the phytic acid, the cupric carbonate and the tartaric acid additive with proper concentration are matched, and under the condition that the pH value is 0.5-3, copper grains with smaller size and uniform distribution can be obtained, and the number of grain boundaries is increased. In the deformation process of the copper foil, the grain boundary can play a role in coordinating deformation, so that the material is more easily subjected to plastic deformation, and the elongation of the ultrathin copper is further improved.