Ternary cathode material lithium ion battery and electrolyte thereof
A technology of lithium-ion batteries and cathode materials, applied in the field of ternary cathode materials, high-voltage lithium-ion batteries and their electrolytes, can solve problems such as insufficient high-temperature storage performance, poor cycle performance, and inability to meet the use of power vehicles in a wide temperature range. Achieve the effects of improving high-temperature storage performance, low-temperature discharge platform, and excellent cycle performance
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Embodiment 1
[0028] Electrolyte preparation:
[0029]In a glove box filled with argon (moisture 6 , and stirred until it was completely dissolved to obtain the lithium-ion battery electrolyte of Example 1.
[0030] Preparation of lithium-ion batteries:
[0031] The positive electrode active material LiNi 0.5 co 0.2 mn 0.3 o 2 (LNCM), conductive agent acetylene black, and binder polyvinylidene fluoride (PVDF) were mixed in N-methylpyrrolidone solvent system at a mass ratio of 95:3:2, and then coated on Al foil and baked. Dry and cold press to obtain the positive electrode sheet with a compacted density of 3.55g / cm 3 .
[0032] Negative electrode active material graphite, conductive agent acetylene black, binder styrene-butadiene rubber (SBR), thickener carbon methyl cellulose sodium (CMC) are in the deionized water solvent system according to the mass ratio of 96:2:1:1 After fully stirring and mixing evenly, it is coated on Cu foil, dried, and cold-pressed to obtain a negative electr...
Embodiment 2
[0036] Different from Example 1 is the preparation of electrolyte:
[0037] In a glove box filled with argon (moisture 6 , and stirred until it was completely dissolved to obtain the lithium-ion battery electrolyte of Example 2.
[0038] The rest are the same as in Embodiment 1, and will not be repeated here.
Embodiment 3
[0040] Different from Example 1 is the preparation of electrolyte:
[0041] In a glove box filled with argon (moisture 6 , and stirred until it was completely dissolved to obtain the lithium-ion battery electrolyte of Example 3.
[0042] The rest are the same as in Embodiment 1, and will not be repeated here.
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