A kind of sodium ion battery ceramic diaphragm and sodium ion secondary battery and application
A technology for sodium-ion batteries and ceramic separators, applied in secondary batteries, battery pack components, circuits, etc., can solve problems such as potential safety hazards, poor wettability of cyclic carbonates, and short-circuiting of batteries, so as to improve wettability and improve circulation. performance, the effect of improving safety performance
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Embodiment 1
[0039] This example is used to illustrate the preparation method of the sodium ion soft pack battery using the sodium ion battery ceramic diaphragm provided by the present invention.
[0040] Preparation of the positive electrode: Add 100 parts by weight of solvent N-methylpyrrolidone (NMP) and 3 parts by weight of binder polyvinylidene fluoride (PVDF) powder to the stirrer, with a revolution of 30 rpm and an autorotation of 3000 rpm Stir for 2 hours; then add 4 parts by weight of conductive agent acetylene black and 0.2 parts by weight of regulator oxalic acid, stir for 1 hour; then add 100 parts by weight of positive electrode active material O 3 -Na 0.9 [Cu 0.22 Fe 0.30 mn 0.48 ]O 2 Stir for 2 hours, go through defoaming, and pass through a 200-mesh sieve to make the required positive electrode slurry for sodium ion batteries.
[0041] The positive electrode slurry of the sodium ion battery obtained above was evenly coated on a 20 micron thick aluminum foil by drawing,...
Embodiment 2
[0046] This example is used to illustrate the performance of the sodium ion soft pack battery prepared by the preparation method provided in Example 1 of the present invention.
[0047] According to the method in Example 1, a 1Ah sodium ion soft pack battery is prepared, and the sodium ion battery ceramic diaphragm used is a polypropylene diaphragm coated by NASICON, and the electrolyte material used is Na 3.4 Zr 1.8 Mg 0.2 Si 2 PO 12 , the particle size is 200nm, and the coating thickness is 2um.
[0048] Scanning electron microscopy analysis was first performed on ceramic separators for sodium-ion batteries, from which figure 1 It can be clearly seen that the particle distribution is uniform.
[0049] Second, it was analyzed for wettability with cyclic carbonates. Draw a small amount of propylene carbonate (PC) and drop it on the diaphragm, such as figure 2 As shown, it can be clearly seen that the wettability is very good and the separator becomes transparent.
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Embodiment 3
[0053] This example is used to illustrate the performance of the sodium ion soft pack battery prepared by the preparation method provided in Example 1 of the present invention.
[0054] According to the method in Example 1, a 1Ah sodium ion soft pack battery was prepared, and the separator used was β-Al 2 o 3 Coated polypropylene separator, the electrolyte material used is Na 1.67 Al 10.67 Li 0.33 o 17 , the particle size is 300nm, and the coating thickness is 2um.
[0055] First, it was analyzed by scanning electron microscopy, and the Figure 4 It can be clearly seen that the particle distribution is uniform.
[0056] Second, it was analyzed for wettability with cyclic carbonates. Draw a small amount of propylene carbonate (PC) and drop it on the diaphragm, by Figure 5 It can be clearly seen that the wettability is very good and the diaphragm becomes transparent.
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Abstract
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