Lithium iron phosphate battery
A lithium iron phosphate battery and lithium salt technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problem that the electrolyte is difficult to meet low-temperature performance requirements
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Embodiment 1
[0059] This embodiment is used to illustrate the lithium iron phosphate battery disclosed in the present invention and its preparation method, including the following steps:
[0060] 1) Preparation of non-aqueous electrolyte: Ethylene carbonate (EC), ethyl methyl carbonate (EMC) and diethyl carbonate (DEC) are mixed according to the mass ratio of EC:EMC:DEC=1:1:1, Lithium hexafluorophosphate (LiPF 6 ) to a molar concentration of 1 mol / L, and based on the total weight of the non-aqueous electrolyte being 100%, add additives containing the mass percent content shown in Example 1 of Table 1.
[0061] 2) Preparation of the positive plate: mix the positive active material LFP (LiFePO 4 ), conductive carbon black Super-P and binder polyvinylidene fluoride (PVDF), and then the mixture was dispersed in N-methyl-2-pyrrolidone (NMP) to obtain positive electrode slurry. The positive electrode slurry is evenly coated on both sides of the aluminum foil, after drying, calendering and vacu...
Embodiment 2~7
[0067] Embodiments 2 to 7 are used to illustrate the non-aqueous electrolyte, lithium ion battery and preparation method thereof disclosed in the present invention, including most of the operating steps in Embodiment 1, the difference being:
[0068] The non-aqueous electrolytic solution is added with the additives shown in the mass percentages of Examples 2 to 7 in Table 1.
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