Electrolyte and lithium ion battery
An electrolyte and lithium salt technology, applied in the field of secondary batteries, can solve problems such as insufficient storage performance and cycle performance, and achieve the effects of improving high-temperature storage performance and cycle performance, reducing side reactions, and stabilizing the structure
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Embodiment 1
[0048] This embodiment is used to illustrate the electrolyte solution, lithium-ion battery and preparation method thereof disclosed in the present invention, including the following steps:
[0049] Electrolyte preparation:
[0050] Mix ethylene carbonate (EC), diethyl carbonate (DEC), and propylene carbonate (PC) in a mass ratio of 1:1:1 as an organic solvent. Add the additive shown in Example 1 in Table 1 to the organic solvent, after mixing evenly, add LiPF6 , to get LiPF 6 Electrolyte with a concentration of 1.1mol / L.
[0051] Production of the positive electrode sheet:
[0052] The positive electrode active material lithium cobaltate (LiCoO 2 ), the conductive agent carbon nanotube (CNT), and the binder polyvinylidene fluoride are fully stirred and mixed in N-methylpyrrolidone solvent at a weight ratio of 97:1.5:1.5 to form a uniform positive electrode slurry. The positive electrode slurry is coated on the positive electrode current collector Al foil, dried, and cold p...
Embodiment 2~8
[0059] Embodiments 2 to 8 are used to illustrate the electrolyte, lithium ion battery and preparation method thereof disclosed in the present invention, including the operation steps of Embodiment 1, and the differences are:
[0060] The electrolyte additives shown in Examples 2-8 in Table 1 were used.
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Abstract
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