A kind of lithium-ion battery non-aqueous electrolyte and lithium-ion battery
A lithium-ion battery and non-aqueous electrolyte technology, applied in the field of lithium-ion batteries, can solve problems that affect battery life and safety performance, low conductivity of lithium-ion battery electrolyte, collapse and damage of positive electrode material structure, etc., and achieve FEC suppression Effects of producing gas, increasing the electrochemical window, and improving kinetic properties
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Embodiment 1
[0035] Electrolyte preparation steps: In a glove box filled with argon, ethylene carbonate, propylene carbonate, diethyl carbonate and ethyl acetate are prepared according to the mass ratio of EC:PC:DEC:PP=25:15:40:20 Mix, then slowly add 14.0wt% lithium hexafluorophosphate to the mixed solution, finally add 5.0wt% fluoroethylene carbonate based on the total weight of the electrolyte, and 4.0wt% 1,3-propane sultone based on the total weight of the electrolyte , 2.5wt% adiponitrile based on the total weight of the electrolyte, 2.5wt% 1,2-bis(2-cyanoethoxy)ethane based on the total weight of the electrolyte, 1.0wt% difluorosulfone based on the total weight of the electrolyte Lithium imide was stirred evenly to obtain the lithium-ion battery electrolyte of Example 1.
[0036] The prepared lithium-ion power battery electrolyte was injected into the fully dried artificial graphite material / LC0-4.4V battery. After the battery was left at 45°C, formed by high-temperature fixtures and...
Embodiment 2-7
[0047] Embodiment 2-7 and comparative example 1-4
[0048] In Examples 2-7 and Comparative Examples 1-4, except that the composition ratio of the components of the electrolyte solution is added as shown in Table 1, the others are the same as in Example 1. The proportioning ratio of the components of the electrolytes of Examples 1-7 and Comparative Examples 1-4 is shown in Table 1, and the physical properties of the electrolytes of Examples 1-7 and Comparative Examples 1-4 are shown in Table 2.
[0049] Table 3 shows the performances of the digital batteries of Examples 1-7 and Comparative Examples 1-4.
[0050] Table 1 Embodiment 1-7 and the composition ratio of each component of the electrolyte of comparative example 1-4
[0051]
[0052] Table 2 embodiment 1-7 and comparative example 1-4 electrolyte physical properties
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[0054]
[0055] Table 3 Embodiment 1-7 and comparative example 1-4 digital battery performance
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