A tin nickel alloy negative material of lithium ion battery and its making method
A tin-nickel alloy negative electrode and lithium-ion battery technology, applied in electrode manufacturing, battery electrodes, electrolytic coatings, etc., can solve poor electrochemical stability, poor compatibility between metal powder and binder, and easy powdering and falling off of electrode active materials and other problems, to achieve the effect of easy operation, elimination of residual mechanical stress, and prevention of agglomeration
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[0024] Example 1
[0025] (1) 0.9mol K 4 P 2 O 7 ·3H 2 O and 0.1 mol glycine were dissolved in a certain amount of deionized water, and then 0.10 mol SnCl 2H 2 O, 0.35mol NiCl 2 ·6H 2 Add O to the above solution to dissolve, add water to make up to 1L, and finally add NH 4 OH adjusted the pH to 7.5.
[0026] (2) adding the electroplating solution prepared in step (1) into the electroplating tank, connecting the tin sheet and the nickel sheet together as the anode, and using the negative electrode current collector copper foil sheet (thickness of 10 microns) for the lithium ion battery as the cathode , One side of the copper foil is coated with oily ink, and the other side is covered with single-sided electroplating. The current density is 0.05A·dm at 45°C. -2 Electroplating under conditions for 10 minutes;
[0027] (3) Wash the electroplated copper foil in acetone to remove the ink, then wash it with distilled water 3 times, blow dry at room temperature, vacuum dry at...
Example Embodiment
[0030] Example 2
[0031] (1) will 0.9molK 4 P 2 O 7 ·3H 2 O and 0.1 mol glycine were dissolved in a certain amount of deionized water, and then 0.15 mol SnCl 2H 2 O, 0.30mol NiCl 2 ·6H 2 Add O to the above solution to dissolve, add water to make up to 1L, and finally add NH 4 OH adjusted pH to 8.
[0032] (2) adding the electroplating solution prepared in step (1) into the electroplating tank, connecting the tin sheet and the nickel sheet together as the anode, and using the negative electrode current collector copper foil sheet (thickness of 10 microns) for the lithium ion battery as the cathode , One side of the copper foil is coated with oily ink, and the other side is covered to achieve single-sided electroplating. At 40 ° C, the current density is 0.1A·am -2 Electroplating under conditions for 10 minutes;
[0033] (3) Wash the electroplated copper foil in acetone to remove the ink, then wash it twice with distilled water, dry it at room temperature, vacuum dry i...
Example Embodiment
[0036] Example 3
[0037] (1) 0.9mol K 4 P 2 O 7 ·3H 2 O and 0.1 mol glycine were dissolved in a certain amount of deionized water, and then 0.23 mol SnCl 2H 2 O, 0.22mol NiCl 2 ·6H 2 Add O to the above solution to dissolve, add water to make up to 1L, and finally add NH 4 OH adjusted the pH to 8.5.
[0038] (2) adding the electroplating solution prepared in step (1) into the electroplating tank, connecting the tin sheet and the nickel sheet together as the anode, and using the negative electrode current collector copper foil sheet (thickness of 10 microns) for the lithium ion battery as the cathode , One side of the copper foil is coated with oily ink, and the other side is covered with single-sided electroplating. The current density is 0.15A·dm at 30°C. -2 Electroplating under conditions for 5 minutes;
[0039] (3) Wash the electroplated copper foil in acetone to remove the ink, then wash it twice with distilled water, dry it at room temperature, vacuum dry it at 1...
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