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New method for testing particle size of lithium battery material PVDF
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A lithium battery material and new method technology, applied in the direction of measuring device, particle size analysis, particle and sedimentation analysis, etc., can solve the problems of long test process and large consumption of test materials, so as to achieve fast and convenient test process, and test materials little effect
Pending Publication Date: 2022-07-29
上海电气国轩新能源科技(南通)有限公司
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During the test, if the PVDF particle size distribution is wide, it is necessary to replace the screen with different apertures. The test process takes a long time and consumes a lot of test materials.
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Embodiment 1
[0042] Embodiment one, choose the PVDF particle sample A that model is DS202D, utilize method to test it as follows:
[0043] (1) Turn on the equipment and use it after preheating for 30 minutes.
[0051] Shading rate: the lower limit is set to 8%, and the upper limit is set to 20%;
[0052] Speed: set to 2400rpm.
[0053] (3) After setting the measurement and setting parameters, click the "Start" button on the laser particle size analyzer to initialize the...
Embodiment 2
[0067] Embodiment two, choose the PVDF particle sample B that model is DS202E, utilize method to test it as follows:
[0068] (1) Turn on the equipment and use it after preheating for 30 minutes.
[0069] (2) Put about 800ml of absolute ethanol into the beaker and place it on the disperser, open the software laser particle size analyzer test software at the same time, and set the test parameters as follows:
[0076] Shading rate: the lower limit is set to 8%, and the upper limit is set to 20%;
[0077] Speed: set to 2400rpm.
[0078] (3) After setting the measurement parameters, click the "Start" button on the laser particle size analyzer to initialize the instrument; ...
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Abstract
The invention discloses a novel method for testing the particle size of a lithium battery material PVDF (polyvinylidene fluoride), and the method for testing PVDF particles comprises the following steps: testing the particle size of the PVDF by adopting a laserdiffraction method, enabling a monochromatic laser beam in a laser particle analyzer to penetrate through a sample solution, scattering the light by the PVDF particles in the solution, and measuring the particle size of the PVDF particles in the sample solution; the scattered light and the initial propagation direction of the light beam are distributed at different angles, and at the moment, a regular multi-element detector receives numerical values of related scattering diagrams at multiple angles, and the numerical values are recorded for later analysis; and calculating the scattering numerical value by using a proper optical model and a mathematical program to obtain the ratio of the particle volume of each particle size level to the total volume so as to obtain the volume distribution of the particle size and the particle size distribution of the sample. Compared with a traditional complex testing technology, the method has the advantage that the particle size distribution of PVDF can be directly obtained through a laser particle analyzer.
Description
technical field [0001] The invention relates to the technical field of rudder plate spraying, in particular to a new method for measuring PVDF particle size of lithium battery materials. Background technique [0002] The traditional test method for the particle size of pvdf of lithiumion materials refers to "HG / T 2901-1997 Test Method for Particle Size of Polytetrafluoroethylene Resin". For polytetrafluoroethylene resin polymerized by suspension method or dispersion method, the particle size can be measured separately. Wet sieving and dry sieving. The test principle of the wet sieving method is to classify the material with a set of sieves to determine the average particle size and agglomerate size of the PTFE resin. Prevent the clogging of the mesh. The testing process requires the use of sieves and sprinklers. The principle of the dry sieving method is to use a set of sieves to classify and sieve to measure the particle size of the polytetrafluoroethylene dispersion re...
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