Flexible battery
A flexible battery and gel electrolyte technology, applied in the field of flexible electronic devices, can solve the problems of reduced electrochemical performance such as energy density, reduced loading of active materials, mass and volume occupied by inactive materials, etc.
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[0056] In the present invention, the preparation method of the aluminum atomic layer preferably includes:
[0057] A dense aluminum atomic layer is deposited on the surface of the positive electrode substrate by using the PVD method.
[0058] In the present invention, the positive electrode active material in the positive electrode active material layer is preferably selected from lithium cobaltate, lithium iron phosphate or ternary positive electrode material; the ternary positive electrode material is preferably NCM811 ternary positive electrode material.
[0059]In the present invention, the thickness of the positive electrode active material layer is preferably 500 nm to 2000 μm, more preferably 800 nm to 1500 μm, more preferably 10 μm to 1000 μm, more preferably 50 μm to 800 μm, and most preferably 400 μm to 600 μm. In an embodiment of the present invention, the thickness of the positive electrode active material layer is preferably 600 μm.
[0060] In the present invent...
Embodiment 1
[0110] The ternary high nickel series NCM811 was selected as the positive electrode active material, and graphite was used as the negative electrode active material.
[0111] The integrated cathode adopts PVD technology to cut the shape of PP film (such as figure 1 A dense aluminum atomic layer (such as figure 2 wherein, the thickness of the PP film is 20 μm, and the thickness of the aluminum atomic layer is 20 nm; the anode slurry is coated on the surface of the aluminum atomic layer and dried to form a cathode active material layer (such as image 3shown); the positive electrode slurry is composed of positive electrode active material, conductive carbon black, binder and solvent, and the mass ratio of positive electrode active material, conductive carbon black and binder is 8:1:1; the thickness of coating positive electrode slurry is 600 μm; the binder is a PVDF solution with a mass concentration of 5%, and the solvent is NMP; the drying time is 6 hours.
[0112] The inte...
Embodiment 2～8
[0118] The flexible battery was prepared according to the method of Example 1, and the difference from Example 1 was that the gel electrolyte component in Table 1 was used to replace the gel electrolyte component in Example 1.
[0119] According to the method of Example 1, the flexible batteries prepared in Examples 2 to 8 of the present invention were tested, and the test results are shown in Table 1.
[0120] Table 1 The gel electrolyte of the flexible battery prepared in Examples 2-8 of the present invention and the performance test results of the flexible battery
[0121]
[0122] It can be seen from Table 1 that the choice of solvent in the gel electrolyte and the choice of lithium salt have a great influence on the electrochemical performance, and the cycle performance of flexible batteries prepared with different proportions and types of gel electrolytes has obvious differences. Examples 1 The prepared flexible battery has good effect. In addition, the content of po...
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Abstract
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