Novel electrode slice and preparation method thereof, and solid-state battery equipped with the same
An electrode sheet, a new type of technology, applied in the direction of electrode manufacturing, battery electrodes, secondary batteries, etc., can solve problems such as easy to break, cannot change the diaphragm, and has no protective effect, so as to reduce the probability of spontaneous combustion and improve safety. Effect
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[0033] Example one:
[0034] A method for preparing a novel negative electrode sheet includes the following steps:
[0035] Step 1. Preparation of coating one and two slurry:
[0036] Weigh the negative active material natural graphite, conductive agent SuperP, binder powder CMC and SBR, where the mass ratio of natural graphite: SP: CMC: SBR = 94:1:1:1, first dissolve CMC with deionized water, Then add natural graphite and SP respectively, and finally add SBR. When these components are completely dispersed and uniform, add deionized water to adjust the solid content of the slurry to 40%, and finally perform vacuum degassing for 4 hours to complete the coating-2 slurry Preparation;
[0037] Step two, preparation of coating two and three slurry:
[0038] a. Mix NMP and DMP at a mass ratio m(NMP): m(DMF)=1:1 to complete the preparation of mixed solvent one;
[0039] b. Stir the mixed solvent one at 500-1000 rpm, and add PVDF powder at a uniform speed according to the mass ratio m (mixed s...
Example Embodiment
[0054] Embodiment two:
[0055] A method for preparing a novel positive electrode sheet includes the following steps:
[0056] Step 1. Preparation of coating slurry:
[0057] Weigh the positive active material NCM, the conductive agent KS-15, the powdered cellulose acetate butyrate and cyanoethyl sucrose as the binder, wherein the mass ratio is NCM: KS-15: cellulose acetate butyrate: cyanoethyl sucrose = 48:1:1:1, first dissolve cyanoethyl sucrose with deionized water, then add NCM and KS-15 respectively, and finally add cellulose acetate butyrate. When these components are completely dispersed, add deionized water. Adjust the solid content of the slurry to 50%, and finally perform vacuum degassing for 4 hours to complete the preparation of the coating slurry;
[0058] Step 2: Preparation of the second coating slurry:
[0059] a. Mix DMAc and acetone at a mass ratio of m(DMAc): m(acetone)=1:1 to complete the preparation of mixed solvent one;
[0060] b. Stir the mixed solvent one at 50...
Example Embodiment
[0065] Embodiment three:
[0066] A method for preparing a novel negative electrode sheet includes the following steps:
[0067] Step 1. Preparation of coating slurry:
[0068] Weigh the negative active material silicon-carbon material, conductive agent Ketjen Black, and binder powder PMMA and PVA. Among them, the mass ratio of silicon-carbon material: Ketjen Black: PMMA: PVA = 95: 1.5: 1.5: 1.5, use first Dissolve PVA in deionized water, then add silicon carbon material and Ketjen Black, and finally add PMMA. When these components are completely dispersed, add deionized water to adjust the solid content of the slurry to 45%, and finally perform vacuum degassing for 4 hours , So as to complete the preparation of the coating slurry;
[0069] Step 2. Preparation of coating three slurry:
[0070] (1) In an environment with a dew point of less than -20°C, mix DMAc and tetrahydrofuran with a mass ratio of m(tetrahydrofuran): m(DMAc)=1:1 to complete the preparation of mixed solvent two;
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