Electrochemical battery and preparation method thereof
An electrochemical and battery technology, applied in the field of electrochemical batteries, can solve the problems of being easily damaged, the performance of flexible batteries is deteriorated, etc., and achieve the effects of reducing processing area, improving energy density, and reducing side effects
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Embodiment 1
[0040] figure 1 It is a schematic diagram of the cross-sectional structure of the electrochemical cell corresponding to this embodiment. It can be seen from the figure that the negative electrode coating 02 is coated on one surface of the negative electrode current collector 01A as the packaging material, and then combined with the separator 03 and the double-sided coated Positive electrode sheet 04 lamination results in a total of four layers of electrodes (two negative electrodes, two positive electrodes, one of the two negative electrodes is coated on one side, one is coated on both sides, and one of the two positive electrodes is coated on one side , one piece is double-sided coating), the positive electrode sheet is welded together with the current collector 05A through the current collector cutting tab 05B, and the current collector 01A, 05A is the water-proof layer in the packaging structure, which consists of a three-layer structure (including two The sealing layer of ...
Embodiment 2
[0050] The difference from Example 1 is that it includes the following steps:
[0051]Auxiliary treatment of negative current collector encapsulation: Put the chromium solution in the electroplating tank, spread the copper foil with a thickness of 30 μm on the surface of the electroplating tank, and perform electroplating to obtain a chromium-containing encapsulation auxiliary treatment layer with a thickness of 10 nm, and then use deionized water Cleaning to obtain the negative electrode current collector after packaging auxiliary treatment for use;
[0052] Negative electrode preparation as a packaging structure: apply the above-mentioned negative electrode slurry on the negative electrode current collector after the above-mentioned packaging auxiliary treatment to obtain a single-sided coated electrode sheet, and then wash off the coating corresponding to the sealing area with deionized water, After slitting, the negative electrode electrode coated on one side of the monoli...
Embodiment 3
[0057] The difference from Example 1 is that it includes the following steps:
[0058] Auxiliary treatment of negative electrode current collector encapsulation: place the chromium solution in the electroplating tank with a fixed structure (the electroplating tank is a "cross" cross tank, of which only the "cross" line is the chrome solution containing tank, and the groove width matches the seal width ( equal to the width of the seal)), and then flatten the copper foil with a thickness of 10 μm on the surface of the electroplating tank for electroplating to obtain a chromium-containing packaging auxiliary treatment layer with a thickness of 10 nm. The chromium-containing packaging auxiliary treatment layer divides the current collector into multiple untreated The processed current collector block is then cleaned with deionized water to obtain the negative electrode current collector after packaging auxiliary treatment for use;
[0059] Auxiliary treatment of positive current c...
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