Lithium-ion batteries are widely used in power batteries,energy storage and consumer electronics.In the field of power bat-teries,ternary lithium and lithium iron phosphate are two commonly used cathode materials for lithium-ion batteries.Ternary lithium materials have the characteristics of high discharge voltage,high output power and high energy density,and have been used in fast charging and long-range models.However,due to its low decomposition temperature,the chemical reaction is more violent,causing the electrolyte to burn rapidly and trigger a chain reaction,making ternary lithium batteries more likely to cause safety accidents than lithium iron phosphate batteries.In view of this,it developed a completely non-combustible ternary lithium electrolyte based on the de-velopment strategy of deep eutectic solvents.The ternary lithium non-combustible electrolyte used N,N-dimethyltrifluoroacetamide(DTA)and ethoxypentafluorocyclotriphosphazene(PFPN)as a solvent(molar is 2 mol),and 1 mol bisfluoride lithium sulfonylimide(LiFSI)is a lithium salt with 2％vinylene carbonate(VC)and 0.5％lithium difluorophosphate(LiPO2F2)as the additives.Under the condition of 0.5C charge and discharge rate,the non-combustible electrolyte has been cycled at 25 ℃ and 45 ℃ for more than 500 times,with a capacity retention rate of more than 80％,which has the commercial value for further development and research.
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