Sealed bonding method of waterproof lithium protection electrode
A technology for sealing, bonding and protecting electrodes, applied in sealing materials, circuits, electrical components, etc., can solve the problems of increasing the complexity of operating procedures and high costs, simplifying the sealing and extraction process, improving firmness and sealing, and improving waterproofness. The effect of the sealing effect
Active Publication Date: 2015-03-25
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 collector bar wrapped in polyethylene (PE) for sealing and lead-out, which will further increase the complexity of the subsequent operation process
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[0038] (1) Clean two pieces of LAGP glass-ceramic membranes 6 with smooth and flat surfaces, 40mm×40mm and 200um in thickness, in acetone solution for ultrasonic cleaning, dedusting and degreasing, and dry them naturally. 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 exposes a bare surface of the LAGP glass-ceramic membrane with a width of 1mm;
[0039] (2) Pre-plating a layer of 1um thick anti-organic electrolyte corrosion-resistant Ti metal coating on the LAGP glass-ceramic film exposed in step (1) by means of DC magnetron sputtering;
[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 solution; the LAGP glass-ceramic film pre-plated with the metal coating in step (2) is soaked in the surface treatment solution for 3-5 minutes and taken out, and the su...
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The invention relates to a sealed bonding method of a waterproof lithium protection electrode. The method comprises the following steps: respectively making a glass ceramic membrane with one side provided with a metal coating frame, a PP-aluminum plastic composite membrane square frame, and a hot melt adhesive square ring; compacting the glass ceramic membrane, the hot melt adhesive square ring and the PP-aluminum plastic composite membrane square frame to form sealed bonding sheets; placing metallic lithium cold pressed with a glued metal tab between two sealed bonding sheets, and packaging the two sealed bonding sheets to form a sealed cavity; and injecting an organic electrolyte into the sealed cavity to surround the metallic lithium, and carrying out evacuation heat sealing. The commercial glued metal tab is used in the invention, and individual processing of a leaded tab is avoided, so the waterproof lithium protection electrode produced in the invention has a very good waterproof sealing effect, the sealed lead-out technology of the tab is simplified, and the cost is reduced; the commercial PP-aluminum plastic composite membrane adopted in the invention is cheap, so the cost is further reduced; and the metal coating is plated through a direct current magnetron sputtering process, so the fastness and the sealing performance of the bonding of the glass ceramic membrane and the PP-aluminum plastic composite membrane are effectively improved.
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...
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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