A mixed solid-liquid electrolyte lithium battery
A lithium battery and solid-state electrolyte technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, lithium batteries, etc., can solve the problems that the thickness of the solid-state electrolyte cannot be well controlled and the production efficiency is low, so as to achieve good transferability and improve Production efficiency and the effect of improving electrical conductivity
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Embodiment 1
[0034] A mixed solid-liquid electrolyte lithium storage battery, comprising a battery core, which is wrapped in the following preparation steps:
[0035] Step 1. Weigh (inorganic solid electrolyte, DBP, polymer): (LiTFSI) = 1 (80:10:10): 0.5 according to the mass ratio;
[0036] Step 2, mixing all the inorganic solid electrolytes and 85% LiTFSI of its own weight with all the polymers in the form of solid particles or powders to make a masterbatch;
[0037] Step 3, mixing the remaining LiTFSI, the solvent and all the DBP to obtain a mixture containing a mass fraction of 3wt% DBP;
[0038] Step 4, mixing the mixture of step 3 with the masterbatch of step 2, heating, melting and kneading by an extruder to obtain a solid electrolyte masterbatch;
[0039] Step 5. Input a diaphragm between a pair of extrusion rollers, and then add the solid electrolyte masterbatch to both sides of the diaphragm, so that the solid electrolyte masterbatch and the diaphragm are extruded together;
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Embodiment 2
[0052] The preparation method of the positive electrode, the negative electrode and the solid-state electrolyte diaphragm is the same as that of Example 1, the difference is that the base film in the solid-state electrolyte diaphragm obtained in the above-mentioned Embodiment 1 uses a PP / PE / PP composite diaphragm, and the polymer in the solid electrolyte replaces into polyethylene oxide, change the weighing ratio in the positive electrode pulping process, and change the positive electrode active material, conductive carbon black, polyethylene oxide-polyvinylidene fluoride and LiTFSI into a mass ratio of 1 (80:8) in Example 1 : 12): 0.01 for weighing and pulping, other schemes remained unchanged, the process of battery packaging and standing and battery testing was the same as in Example 1, and the performance parameters of the battery were listed in Table 1.
Embodiment 3
[0054] The preparation method of the positive electrode, the negative electrode, and the solid-state electrolyte diaphragm is the same as in Example 1, the difference is that the lithium iron phosphate in the positive electrode sheet obtained in the above-mentioned Example 1 is replaced with lithium cobaltate, and the polymer in the solid-state electrolyte is replaced with polysilicon Oxane, change the weighing ratio in the positive electrode pulping process, and change the positive electrode active material, conductive carbon black, polyoxyethylene-polyvinylidene fluoride and LiTFSI into 1 (86:12:3 by mass ratio) in Example 1 ): 0.03 for weighing and pulping, other schemes remain unchanged, the process of battery packaging and battery testing is the same as in Example 1, and the performance parameters of the battery are listed in Table 1.
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