Quantitative analysis method for mixing uniformity of raw materials of supercapacitor electrode

Abstract

The invention relates to a quantitative analysis method for the mixing uniformity of raw materials of a supercapacitor electrode. The method is characterized by comprising the following steps: marking the raw materials of a supercapacitor electrode by a tracer agent, mixing the raw materials into a slurry or dry mixture, quantitatively detecting the content of tracer agent in the mixed slurry or dry mixture, calculating the relative standard deviation (RSD) of the tracer agent content detected at different positions of mixing equipment after the mixing of electrode raw materials, and analyzing the mixing uniformity of the electrode raw materials. The technical scheme provided by the invention can fill in the blank of reasonable mixing uniformity detection means in a mixing stage of an electrode preparation process of existing supercapacitor, and effectively solves the problems of insufficient dispersing uniformity of slurry or low slurrying efficiency and low mixing uniformity or low mixing efficiency of dry carbon particles and dry binder.

Description

technical field

[0001] The invention relates to a quantitative analysis method for the mixing uniformity of electrode raw materials for supercapacitors. Background technique

[0002] The electric double layer supercapacitor stores energy by forming an electric double layer at the interface between the electrode and the electrolyte. The electrode preparation process usually requires the use of a binder to bond the active material and the conductive agent to the current collector. The mixture is a supercapacitor One of the important steps in the electrode preparation process. Since the binder, active material, and conductive agent for supercapacitors are mixed and difficult to separate, in the prior art, the mixture is usually further processed into an electrode, and then the scanning electron microscope (SEM) image of the prepared electrode sample is observed. , transmission electron microscope (TEM) image or test the peel strength of the electrode sample to analyze the dist...

Examples

Embodiment 1

[0033] 1) Weigh 880 grams of activated carbon for supercapacitor and place it in a stainless steel reaction kettle, and successfully label the activated carbon with 1 gram of europium-activated yttrium oxide phosphor by physical and chemical methods;

[0034]2) According to the wet process, 880 grams of activated carbon successfully labeled with yttrium oxide phosphor activated by europium, 50 grams of acetylene black, 70 grams of polyvinylidene fluoride and 1800 grams of N-methylpyrrolidone were put into the planetary mixer in turn, and vacuum stirred 240 minutes to form a slurry;

[0035] 3) Take out 0.2 grams of slurry from 6 different positions of the planetary mixer, and use a fluorescence detector to quantitatively detect the content of europium-activated yttrium oxide phosphor in the samples taken. The test results are shown in Table 1.

[0036] Coat the slurry in the planetary mixer on a 22 μm thick corroded aluminum foil to form a wet electrode, then transfer the coat...

Embodiment 2

[0038] 1) 30 grams of carbon nanotubes were weighed and placed in a stainless steel reaction kettle, and the carbon nanotubes were successfully labeled with 1 gram of terbium-activated aluminate phosphors by physical and chemical methods;

[0039] 2) According to the wet process, 30 grams of carbon nanotubes successfully labeled with terbium-activated aluminate phosphors were mixed with 900 grams of activated carbon for supercapacitors, 30 grams of poly-N-vinylacetamide, and 100 grams of styrene-butadiene. Rubber emulsion and 2050 grams of water are put into the internal mixer successively, and vacuum banburying forms slurry for 180 minutes;

[0040] 3) Take 0.2 grams of slurry from 6 different positions of the internal mixer, and use a fluorescence detector to quantitatively detect the content of terbium-activated aluminate phosphor in the sample taken. The test results are shown in Table 1.

[0041] Coat the slurry in the internal mixer on a 22 μm thick corroded aluminum foi...

Embodiment 3

[0043] 1) Weigh 66.7 grams of polytetrafluoroethylene emulsion and place it in a stainless steel reactor, and successfully label the obtained polytetrafluoroethylene emulsion with 1 gram of europium-activated barium magnesium aluminate fluorescent powder by physical and chemical methods;

[0044] 2) 66.7 grams of polytetrafluoroethylene emulsion successfully labeled with europium-activated barium magnesium aluminate fluorescent powder were mixed with 880 grams of graphene, 30 grams of carboxymethyl cellulose, 50 grams of Ketjen black and 2120 grams of water according to the wet process. Put into the kneader successively, and vacuum knead for 300 minutes to form a slurry;

[0045] 3) Take out 0.2 grams of slurry from 6 different positions of the kneader, and use a fluorescence detector to quantitatively detect the content of europium-activated barium magnesium aluminate phosphor in the sample taken. The test results are shown in Table 1.

[0046] Apply the slurry in the kneader...

technical field

[0001] The invention relates to a quantitative analysis method for the mixing uniformity of electrode raw materials for supercapacitors. Background technique

[0002] The electric double layer supercapacitor stores energy by forming an electric double layer at the interface between the electrode and the electrolyte. The electrode preparation process usually requires the use of a binder to bond the active material and the conductive agent to the current collector. The mixture is a supercapacitor One of the important steps in the electrode preparation process. Since the binder, active material, and conductive agent for supercapacitors are mixed and difficult to separate, in the prior art, the mixture is usually further processed into an electrode, and then the scanning electron microscope (SEM) image of the prepared electrode sample is observed. , transmission electron microscope (TEM) image or test the peel strength of the electrode sample to analyze the dist...

Examples

Embodiment 1

[0033] 1) Weigh 880 grams of activated carbon for supercapacitor and place it in a stainless steel reaction kettle, and successfully label the activated carbon with 1 gram of europium-activated yttrium oxide phosphor by physical and chemical methods;

[0034]2) According to the wet process, 880 grams of activated carbon successfully labeled with yttrium oxide phosphor activated by europium, 50 grams of acetylene black, 70 grams of polyvinylidene fluoride and 1800 grams of N-methylpyrrolidone were put into the planetary mixer in turn, and vacuum stirred 240 minutes to form a slurry;

[0035] 3) Take out 0.2 grams of slurry from 6 different positions of the planetary mixer, and use a fluorescence detector to quantitatively detect the content of europium-activated yttrium oxide phosphor in the samples taken. The test results are shown in Table 1.

[0036] Coat the slurry in the planetary mixer on a 22 μm thick corroded aluminum foil to form a wet electrode, then transfer the coat...

Embodiment 2

[0038] 1) 30 grams of carbon nanotubes were weighed and placed in a stainless steel reaction kettle, and the carbon nanotubes were successfully labeled with 1 gram of terbium-activated aluminate phosphors by physical and chemical methods;

[0039] 2) According to the wet process, 30 grams of carbon nanotubes successfully labeled with terbium-activated aluminate phosphors were mixed with 900 grams of activated carbon for supercapacitors, 30 grams of poly-N-vinylacetamide, and 100 grams of styrene-butadiene. Rubber emulsion and 2050 grams of water are put into the internal mixer successively, and vacuum banburying forms slurry for 180 minutes;

[0040] 3) Take 0.2 grams of slurry from 6 different positions of the internal mixer, and use a fluorescence detector to quantitatively detect the content of terbium-activated aluminate phosphor in the sample taken. The test results are shown in Table 1.

[0041] Coat the slurry in the internal mixer on a 22 μm thick corroded aluminum foi...

Embodiment 3

[0043] 1) Weigh 66.7 grams of polytetrafluoroethylene emulsion and place it in a stainless steel reactor, and successfully label the obtained polytetrafluoroethylene emulsion with 1 gram of europium-activated barium magnesium aluminate fluorescent powder by physical and chemical methods;

[0044] 2) 66.7 grams of polytetrafluoroethylene emulsion successfully labeled with europium-activated barium magnesium aluminate fluorescent powder were mixed with 880 grams of graphene, 30 grams of carboxymethyl cellulose, 50 grams of Ketjen black and 2120 grams of water according to the wet process. Put into the kneader successively, and vacuum knead for 300 minutes to form a slurry;

[0045] 3) Take out 0.2 grams of slurry from 6 different positions of the kneader, and use a fluorescence detector to quantitatively detect the content of europium-activated barium magnesium aluminate phosphor in the sample taken. The test results are shown in Table 1.

[0046] Apply the slurry in the kneader...

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