High-capacity fast charging battery with infiltrating grid type electrode

Abstract

The invention relates to a high-capacity fast-charging battery with an infiltrating grid type electrode. The high-capacity fast-charging battery comprises a positive electrode, a negative electrode, an insulating partition plate arranged between the positive electrode and the negative electrode, and an electrolytic solution, wherein the negative electrode is an infiltrating grid type electrode and comprises a negative electrode current collecting bridge frame, a grid plate and copper grid electrodes, the negative electrode current collecting bridge frame is a grid body formed by a plurality of grids which are vertically and horizontally arranged, each grid is provided with a grid plate, a plurality of copper grid electrodes are arranged on two end surfaces of each grid plate in a fiber shape, each grid forms a battery energy storage square cavity, the copper grid electrodes are coated with Si coatings or C coatings, and the distance between every two adjacent copper grid electrodes is an expansion gap. According to the invention, the battery is provided with the infiltrating grid type electrode, so that lithium ions can be attached in a three-dimensional and deep manner and flow smoothly, lithium dendrites can be prevented, the specific capacity of the battery is large, and the charging speed is high; and the battery is long in service life and can be recycled.

Description

technical field [0001] The present invention relates to the technical field of high-capacity batteries, in particular to a battery with a wettable grid electrode, so that lithium ions can be attached in a three-dimensional and deep manner and flow smoothly, so that the battery has a large specific capacity, a fast charging speed, a long service life and can be used. Recycled high-capacity batteries. Background technique [0002] Such as figure 1 , the traditional battery uses aluminum AL as the positive electrode current collector 1', coated with a positive electrode coating such as LiCoO2, as the positive electrode of the battery, and uses copper Cu as the negative electrode current collector 2', coated with Si (or C) powder coating, as the battery Negative electrode, electrolyte and insulating diaphragm 3' in the middle, 11' for Li ions, 12' for negative electrode Si (or C) nanoparticles, A is the A side of the negative electrode current collector, B is the B side of the ...

AI Technical Summary

Problems solved by technology

[0015] 2. There are more Li ions on the surface of the negative electrode, and it is difficult for Li ions to enter the deep layer;

[0016] 3. During discharge, if the discharge rate of the negative plate A and B of the battery is different, resulting in a different thermal expansion ratio on both sides, it will cause the battery plate to bend and deform, causing the coating to bubble and fall off, thereby affecting the performance of the battery;

[0017] 4. When the negative electrode 4Li and 4Si form a Li4.Si4 matrix structure, the specific capacity can be increased dozens of times to 4200mAh / g, but its volume will also expand by more than 300%. The traditional battery coating is mainly attached to the plate in a flat manner. Lack of expansion space, which leads to the peeling off of the negative electrode coating and serious deformation;

[0018] 5. Positive and negative electrode coatings are seriously adhered to the metal foil of the electrode plate, which is difficult to recycle and reuse, and the discarded battery electrodes cause serious environmental pollution;

[0019] 6. The charging resistance is large, it is easy to form lithium dendrites and charging memory, and the battery ages quickly

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