A high-voltage electrolyte suitable for fast-charging lithium cobalt oxide batteries and its application
An electrolyte and high-voltage technology, applied in the field of lithium-ion batteries, to achieve the effects of improving cycle stability, preventing local film thickness, and improving fast charging performance and low temperature performance
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[0022] In an argon-filled glove box (moisture 4 ) and bis(trimethylsilyl)lithium phosphate (LiPO) based on 7.2% of the total mass of the electrolyte 4 (Si(CH 3 ) 3 ) 2 ), and stirred until it was completely dissolved to obtain the lithium-ion battery electrolyte of Example 1.
[0023] Inject the prepared electrolyte into the positive electrode LiCoO 2 Materials, in the pouch battery with graphite material as the negative electrode, the battery is packaged, placed on hold at 45°C, high-temperature formation, secondary packaging, and capacity separation to obtain a high-voltage lithium cobaltate lithium-ion battery.
[0024] As shown in Table 1, in Examples 2-5 and Comparative Examples 1-7, except that the components and proportions of the electrolyte solution are added as shown in Table 1, the others are the same as in Example 1.
[0025] Table 1 Composition and proportioning of the electrolyte solutions of Examples 1-5 and Comparative Examples 1-7
[0026]
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