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Method for testing the peel strength of solid electrolyte membrane

A solid electrolyte membrane and peel strength technology, applied in the preparation of test samples, measuring devices, sampling, etc., can solve the problems of low data accuracy, poor overall application effect, complicated operation, etc. Peeling effect, effect of improving accuracy

Inactive Publication Date: 2020-04-10
ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the problem in the prior art that the method for measuring the peel strength of a solid electrolyte membrane is complex in operation and low in data accuracy, resulting in a poor overall application effect, the purpose of the present invention is to provide a method for testing the peel strength of a solid electrolyte membrane. To solve the above technical problems, the operation is simple, the repeatability is good, the data accuracy is high, and the stability is good

Method used

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  • Method for testing the peel strength of solid electrolyte membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: A method for testing the peel strength of a solid electrolyte membrane, comprising the following steps:

[0034] Step 1: Stick 19mm wide 3M adhesive tape on the composite pole piece coated with solid electrolyte membrane according to the MD and TD directions;

[0035] Step 2: Gently remove the air bubbles between the tape and the composite pole piece by hand, and then use a 2.1kg rubber roller to roll back and forth 9 times to ensure that the pressure of each sample preparation is stable and the sample is obtained;

[0036] Step 3, use a utility knife and a steel ruler to cut the sample into sample strips of the same width along the outer edge of the tape;

[0037] Step 4. Gently peel off one end of the tape, and the length of the tape is 4mm, so that the solid electrolyte membrane adhered to the tape is separated from the composite pole piece, and the tape and the composite pole piece are respectively clamped with a clamp, and the peel strength test is pe...

Embodiment 2

[0038] Embodiment 2: A method for testing the peel strength of a solid electrolyte membrane. The difference from Example 1 is that in step 1, a 16mm wide 3M adhesive tape is adhered to the composite pole piece coated with a solid electrolyte membrane according to the MD and TD directions. ;

[0039] Step 2: Gently remove the air bubbles between the tape and the composite pole piece by hand, and then use a 1.8kg rubber roller to roll back and forth 8 times to ensure that the pressure of each sample preparation is stable and the sample is obtained;

[0040] Step 3, use a utility knife and a steel ruler to cut the sample into sample strips of the same width along the outer edge of the tape;

[0041] Step 4. Gently peel off one end of the tape, and the length of the tape is 3mm, so that the solid electrolyte membrane adhered to the tape is separated from the composite pole piece, and the tape and the composite pole piece are respectively clamped with a clamp, and the peel strength...

Embodiment 3

[0042] Embodiment 3: A method for testing the peel strength of a solid electrolyte membrane. The difference from Example 1 is that in step 1, a 22mm wide 3M adhesive tape is adhered to the composite pole piece coated with a solid electrolyte membrane according to the MD and TD directions. ;

[0043] Step 2: Gently remove the air bubbles between the tape and the composite pole piece by hand, and then use a 2.4kg rubber roller to roll back and forth 10 times to ensure that the pressure of each sample preparation is stable and the sample is obtained;

[0044] Step 3, use a utility knife and a steel ruler to cut the sample into sample strips of the same width along the outer edge of the tape;

[0045] Step 4. Gently peel off one end of the tape, and the length of the tape is 5mm, so that the solid electrolyte membrane adhered to the tape is separated from the composite pole piece, and the tape and the composite pole piece are respectively clamped with a clamp, and the peel strength ...

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Abstract

The invention discloses a method for testing the peel strength of a solid electrolyte membrane, relates to the technical field of new energy lithium secondary batteries, and solves the problem of pooroverall application effect caused by complex operation and low data accuracy of a method for measuring the peel strength of the solid electrolyte membrane. The method comprises the following steps: step 1, respectively adhering adhesive tapes to a composite pole piece coated with a solid electrolyte membrane according to MD and TD directions; step 2, gently removing bubbles between the adhesive tapes and the composite pole piece by hands, and rolling back and forth by using a rubber roller to ensure that the pressure of each sample preparation is stable so as to obtain a sample; step 3, cutting the sample into sample strips with the same width along the outer edges of the adhesive tapes by using an art knife and a steel ruler; and step 4, lightly stripping one ends of the adhesive tapes to separate the solid electrolyte membrane adhered to the adhesive tapes from the composite pole piece, respectively clamping the adhesive tapes and the composite pole piece by using a clamp, and carrying out a peel strength test. The invention is simple to operate, good in repeatability, high in data accuracy and good in stability.

Description

technical field [0001] The invention relates to the technical field of new energy lithium secondary batteries, more specifically, it relates to a method for testing the peel strength of a solid electrolyte membrane. Background technique [0002] Coating the solid-state electrolyte film on the pole piece is currently the main method to reduce the interface impedance between the solid-state electrolyte and the solid-state electrode in the solid-state lithium battery, thereby improving the battery rate performance and cycle performance. Therefore, the bonding strength between the solid electrolyte membrane and the pole piece has a great influence on the performance of the battery. [0003] In the Chinese invention patent whose publication number is CN108072605A, a test method for the peel strength of lithium-ion battery pole pieces is disclosed. One side of the first double-sided adhesive is stuck on the steel plate, and the other side is stuck on the dressing layer of the lith...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/04G01N1/28
CPCG01N19/04G01N1/286
Inventor 许晓雄陶金林晓张永龙
Owner ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
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