A kind of eutectic ionic liquid electrodeposition prepares the method for lithium-ion battery copper foil
A lithium-ion battery and ionic liquid technology, which is applied in the field of eutectic ionic liquid electrodeposition to prepare copper foil for lithium-ion batteries, can solve problems such as complex formula components, unstable copper foil quality, and difficult control of additive components. To achieve the effect of stable product quality, short production process and low reaction energy consumption
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Embodiment 1
[0019] The method for preparing copper foil for lithium-ion batteries by electrodeposition of eutectic ionic liquids has the following specific steps: first, choline chloride and urea are dried under vacuum at 80° C., then mixed according to a molar ratio of 1:2 and heated at 80 The low eutectic ionic liquid was prepared by reacting at a constant temperature for 1 h at ℃; measure 50 mL of low eutectic ionic liquid, add copper precursor and mix evenly to form an ionic liquid-copper salt composite electrolyte, in which the copper precursor is cuprous oxide , the mass ratio of the volume of eutectic ionic liquid to cuprous oxide is 100:500ml / mg; under an inert atmosphere, a stainless steel sheet (3.0cm×1.0cm×0.2cm) is used as the cathode, graphite is used as the anode, and the distance between the poles 1cm, at a temperature of 50°C, a stirring rate of 200r / min, and a control cell voltage of 2.2V, electrodeposit for 1h, and the copper foil can be prepared on the surface of the cat...
Embodiment 2
[0021] The method for preparing copper foil for lithium-ion batteries by electrodeposition of eutectic ionic liquids, the specific steps are as follows: first, dry acetylcholine chloride and dimethylformamide under vacuum at 80°C, and then mix them according to the molar ratio of 1:3 And react at a constant temperature of 80°C for 1 hour to prepare a low-eutectic ionic liquid; measure 50mL of a low-eutectic ionic liquid, add copper precursor and mix evenly to form an ionic liquid-copper salt composite electrolyte, wherein the copper precursor is Copper chloride, the mass ratio of the volume of low eutectic ionic liquid to cuprous oxide is 100:1000ml / mg; under an inert atmosphere, use a nickel sheet (3.0cm×1.0cm×0.2cm) as the cathode and graphite as the anode , the electrode spacing is 1cm, under the conditions of temperature 30℃, stirring rate 100r / min, control cell voltage 2.0V, electrodeposition 1h, that is, copper foil can be prepared on the surface of the cathode with an av...
Embodiment 3
[0023] The method for preparing copper foil for lithium ion batteries by electrodeposition of eutectic ionic liquids, the specific steps are as follows: first, choline chloride and urea are mixed according to the molar ratio of 1:3 after being dried under vacuum at 80°C, and mixed at 80 The eutectic ionic liquid was prepared by reacting at a constant temperature at ℃ for 1 h; measure 50 mL of eutectic ionic liquid, and in an inert atmosphere, use pure copper as the anode and a nickel sheet (3.0cm×1.0cm×0.2cm) as the cathode , the pole spacing is 2cm, at a temperature of 50°C, a stirring rate of 200r / min, and a controlled current density of 5mA. cm -2 Under these conditions, after 0.5h of electrodeposition, copper foil can be prepared on the surface of the cathode with an average thickness of 7.5µm.
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