A tin-based alloy negative plate for lithium ion battery and preparation method thereof
A technology of lithium-ion batteries and tin-based alloys, applied in electrode manufacturing, battery electrodes, circuits, etc., can solve problems such as tin shedding, and achieve the effects of cost saving, high volume density, and convenient operation
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Embodiment 1
[0037] The lithium-ion battery tin-based alloy negative plate of the present embodiment is prepared by the following method:
[0038] 1) Get electroplating solution main salt and electroplating complexing agent to prepare electroplating solution, in described electroplating solution, the concentration of potassium pyrophosphate is 0.1mol / L, the concentration of copper pyrophosphate is 0.06mol / L, the concentration of stannous pyrophosphate It is 0.05mol / L; the prepared electroplating solution is left to settle, and filtered to obtain a transparent copper-tin solution, which is electroplating solution A.
[0039] 2) Add SP, PEG, gelatin respectively as additive in electroplating solution A, obtain electroplating solution B, the total content of SP, PEG, gelatin in described electroplating solution B is 0.5g / L;
[0040] 3) Select a pure titanium roller as the cathode, and an electrode plate with a tin-copper ratio of 5:6 as the anode. The cathode used for electroplating is treate...
Embodiment 2
[0047] The lithium-ion battery tin-based alloy negative plate of the present embodiment is prepared by the following method:
[0048] 1) Get electroplating solution main salt and electroplating complexing agent to prepare electroplating solution, in described electroplating solution, the concentration of potassium pyrophosphate is 0.5mol / L, the concentration of copper pyrophosphate is 0.3mol / L, the concentration of stannous pyrophosphate The concentration of iron pyrophosphate is 0.25mol / L, and the concentration of iron pyrophosphate is 0.02mol / L; the prepared electroplating solution is left to settle, and filtered to obtain a transparent copper-tin solution, which is electroplating solution A.
[0049] 2) in electroplating solution A, add SP, PEG, gelatin respectively as additive, obtain electroplating solution B, the total content of SP, PEG, gelatin in described electroplating solution B is 5g / L;
[0050] 3) Select a pure titanium roller as the cathode, and an electrode pla...
Embodiment 3
[0056] The lithium-ion battery tin-based alloy negative plate of the present embodiment is prepared by the following method:
[0057] 1) Get electroplating solution main salt and electroplating complexing agent preparation electroplating solution, in described electroplating solution, the concentration of potassium pyrophosphate is 0.5mol / L, the concentration of copper pyrophosphate is 0.15mol / L, the concentration of stannous pyrophosphate 0.125mol / L, Cr 3+ The concentration of the solution is 0.01mol / L; the prepared electroplating solution is left to settle, and filtered to obtain a transparent copper-tin solution, which is the electroplating solution A.
[0058] 2) in electroplating solution A, add SP, PEG, gelatin respectively as additive, obtain electroplating solution B, the total content of SP, PEG, gelatin in described electroplating solution B is 5g / L;
[0059] 3) Select a pure titanium roller as the cathode, and an electrode plate with a tin-to-copper ratio of 5:6 as...
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