Flame-retardant electrolyte for secondary lithium-sulfur battery and preparation method thereof
A lithium-sulfur battery and electrolyte technology, which is applied to the secondary lithium-sulfur battery electrolyte system, flame-retardant electrolyte and the field of preparation thereof, achieves the effects of small electrical conductivity, reduced flammability, and taking into account the flame-retardant effect
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Embodiment 1
[0029] In the glove box, EC and EMC were uniformly mixed at a volume ratio of 1:1, and LiPF was added to the mixed solvent 6 , and stir evenly to make an electrolyte solution with a concentration of 1mol / L. Then add the flame retardant DMMP to the electrolyte to obtain the flame retardant electrolyte, the mass percentage content of the DMMP accounting for the total weight of the flame retardant electrolyte is respectively 7%, 11%, 15%, 21%, 30%, 50%.
Embodiment 2
[0031] Mix EC, PC, and DEC uniformly in a volume ratio of 1:1:1 in a glove box, and add LiPF to the mixed solvent 6 , and stir evenly to make an electrolyte solution with a concentration of 0.5mol / L. Then add the flame retardant TTEP to the electrolyte to obtain the flame retardant electrolyte, and the mass percent content of the TTEP accounted for the total weight of the flame retardant electrolyte is respectively 1%, 7%, 11%, 15%, 21%, 30% %, 50%.
Embodiment 3
[0033] In the glove box, DOL and DMC were uniformly mixed at a volume ratio of 1:1, and LiN(CF 3 SO 2 ) 2 , and stir evenly to make an electrolyte solution with a concentration of 2mol / L. Then add flame retardants TPP(i) and TPP (the volume ratio of the two is 1:1) to the electrolyte to obtain a flame retardant electrolyte, and the TPP(i) accounts for the mass percentage content of the total weight of the flame retardant electrolyte They are 1%, 7%, 11%, 15%, 21%, 30%, and 50%, respectively.
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