Sealing bonding method for waterproof lithium protective electrode
A technology for sealing and bonding and protecting electrodes, which is applied in the direction of sealing materials, circuits, electrical components, etc., can solve the problems of high cost and increase the complexity of the operation process, improve firmness and sealing, simplify the process of sealing and leading out, and improve The effect of waterproof sealing effect
Active Publication Date: 2017-06-27
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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Problems solved by technology
From the perspective of the sealing and bonding effect introduced in this patent, it is ideal, but the disadvantage is that the aluminum-plastic composite film with LDPE as the hot-melt layer has a high cost, and the aluminum-plastic composite film with LDPE as the hot-melt layer is used as the When using the lithium electrode packaging material, the lead-out end of the tab needs to be separately developed a metal current collector bar wrapped in polyethylene (PE) for sealing and lead-out, which will further increase the complexity of the subsequent operation process
Method used
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[0038] (1) Clean two pieces of LAGP glass-ceramic membranes 6 with smooth and flat surfaces, 40mm×40mm and 200 microns in thickness, in acetone solution for ultrasonic cleaning, dedusting and degreasing. The area of the polyimide tape is completely attached, and the center of the other side is pasted with a 39mm×39mm polyimide tape. Only one side of the LAGP glass-ceramic membrane is exposed around the bare surface of the LAGP glass-ceramic membrane with a width of 1mm;
[0039] (2) adopting the DC magnetron sputtering method to pre-plate a 1-micron thick anti-organic electrolyte corrosion-resistant Ti metal coating on the LAGP glass-ceramic film exposed in step (1);
[0040] (3) Select deionized water as the solvent, and dissolve 1g / L NaF and 5g / L CrO in the solvent 3 and K of 1.3g / L 2 Cr 2 o 7 As a surface treatment liquid; the LAGP glass-ceramic film pre-plated with the metal coating in step (2) is soaked in the surface treatment liquid for 3-5 minutes and taken out, a...
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The invention relates to a sealing and bonding method for a waterproof lithium protection electrode. The preparation steps include: separately making a glass ceramic film with a metal coating frame on one side, a PP-aluminum-plastic composite film frame, and a hot melt adhesive square ring; Film, hot melt adhesive square ring and PP‑aluminum-plastic composite film are pressed into a sealing adhesive sheet; cold-pressed metal lithium with adhesive metal tabs is placed between two sealing adhesive sheets, and the two sealing adhesive sheets It is packaged into a sealed chamber; the organic electrolyte is injected into the sealed chamber around lithium metal, and then vacuumized and heat-sealed. The invention uses commercialized metal lugs with glue, without separate processing of the lead-out lugs, and the waterproof lithium protection electrode produced has a good waterproof sealing effect, simplifies the lug sealing and lead-out process, and reduces the cost; cheap commodities are used The PP-aluminum-plastic composite film is used to further reduce the cost; the metal coating is applied by the DC magnetron sputtering method, which effectively improves the bonding firmness and sealing of the glass-ceramic film and the PP-aluminum-plastic composite film.
Description
technical field [0001] The invention belongs to the technical field of lithium batteries, in particular to a sealing and bonding method for a waterproof lithium protection electrode. Background technique [0002] Waterproof lithium protection electrode technology is another innovative breakthrough in the field of chemical power sources in recent years. It expands the electrolyte environment that metal lithium batteries can use from non-aqueous solutions to aqueous solutions, giving full play to the role of metal lithium negative electrodes in aqueous solutions. Energy advantages, the energy density of batteries made with waterproof lithium-protected electrode technology is much higher than that of batteries made with traditional electrode technology, and will be widely used as power sources for underwater devices. [0003] The sealing technology of the waterproof lithium protection electrode is very important. It will directly affect the reliability of the waterproof lithium...
Claims
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IPC IPC(8): H01M2/08H01M2/06H01M50/172H01M50/198
CPCH01M10/0525H01M50/183H01M50/531Y02E60/10
Inventor 桑林徐志彬郝明明丁飞
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST