A kind of electrolyte solution and lithium ion secondary battery
A secondary battery, lithium ion technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems that do not involve the application of cyclic phosphoric anhydride, and achieve improved cycle performance, good thermal stability, and reduced gas production. Effect
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Embodiment 1
[0032] with LiPF 6 It is an electrolyte lithium salt, EC / EMC is an aprotic organic solvent, and 1-perfluoropropyl phosphoric anhydride (FPACA) is used as an additive, where EC:EMC=1:2, LiPF 6 The mass fraction is 12%, and the FPACA mass fraction is 0.1% (the above ratios are all mass ratios), in a dry glove box filled with high-purity argon (H 2 O2 6, stirred evenly, transferred to a 1L fluoride bottle through a funnel, sealed with aluminum plastic film, and then added an appropriate amount of electrolyte to Li / LiNi 0.5 mn 1.5 o 4 Coin Cell and Graphite / LiNi 0.5 mn 1.5 o 4 Charge and discharge test in full battery.
Embodiment 2
[0034] with LiPF 6 It is an electrolyte lithium salt, EC / EMC is an aprotic organic solvent, and FPACA is used as an additive, where EC:EMC=1:2, LiPF 6 The mass fraction is 12%, and the FPACA mass fraction is 0.5% (the above ratios are all mass ratios), in a dry glove box filled with high-purity argon (H 2 O2 6 , stirred evenly, transferred to a 1L fluoride bottle through a funnel, sealed with aluminum plastic film, and then added an appropriate amount of electrolyte to Li / LiNi 0.5 mn 1.5 o 4 Coin Cell and Graphite / LiNi 0.5 mn 1.5 o 4 Charge and discharge test in full battery.
Embodiment 3
[0036] with LiPF 6 It is an electrolyte lithium salt, EC / EMC is an aprotic organic solvent, and FPACA is used as an additive, where EC:EMC=1:2, LiPF 6 The mass fraction is 12%, and the FPACA content is 2% (the above ratios are all mass ratios), in a dry glove box filled with high-purity argon (H 2 O2 6 , stirred evenly, transferred to a 1L fluoride bottle through a funnel, sealed with aluminum plastic film, and then added an appropriate amount of electrolyte to Li / LiNi 0.5 mn 1.5 o 4 Coin Cell and Graphite / LiNi 0.5 mn 1.5 o 4 Charge and discharge test in full battery.
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