Gel type ionic liquid electrolyte for lithium ion battery as well as preparation method and application thereof
An ionic liquid and electrolyte technology, which is applied in the manufacture of electrolyte batteries, electrolytes, lithium batteries, etc., can solve the problems of aggravating the interface rupture and regeneration of solid electrolytes, and consume electrolytes, so as to inhibit the growth of dendrites, reduce interface impedance, and improve mechanical properties. performance effect
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Embodiment 1
[0058] Under an argon atmosphere, first dissolve 0.14g LiTFSI and 0.09g LiFSI polylithium salt solutes in 0.79g cyclic ether organic solvent DOL in a glass sample bottle, and then add 0.31g of ionic liquid Pyr 14 TFSI, mixed evenly by magnetic stirring; finally add 0.15g of Lewis acid lithium salt initiator LiPF 6 , it was completely dissolved by magnetic stirring, and the Pyr-containing 14 TFSI's trilithium salt gel-type ionic liquid electrolyte precursor solution, after standing for 2 days at room temperature, obtained Pyr-containing 14 TFSI's triple lithium salt gel-type ionic liquid electrolyte. Pyr 14 The structure of TFSI is as follows:
[0059]
[0060] The Pyr 14 In TFSI's triple lithium salt gel-type ionic liquid electrolyte, the content of ionic liquid is 21 wt%, the content of cyclic ether organic solvent is 53.4 wt%, the content of Lewis acid lithium salt initiator is 10.1 wt%, and more The content of lithium salt solute is 15.5wt%.
Embodiment 2
[0062] Under an argon atmosphere, first dissolve 0.17g LiTFSI and 0.11g LiFSI in 0.93 g ethylene glycol diglycidyl ether in a glass sample bottle, and add 0.03 g of SiO with a particle size of 30 nm 2 nanoparticles; then add 0.22g ionic liquid PI 34 FSI, mixed evenly by magnetic stirring; finally, add 0.18g of Lewis acid lithium salt initiator LiBF 4 , dissolved completely by magnetic stirring to obtain 34 The trilithium salt gel-type ionic liquid electrolyte precursor solution of FSI, after standing for 3 days at room temperature, obtained PI-containing 34 FSI's triple lithium salt gel-type ionic liquid electrolyte. P.I. 34 The structure of the FSI is as follows:
[0063]
[0064] The containing PI 34 In FSI's triple lithium salt gel-type ionic liquid electrolyte, the content of ionic liquid is 13.4 wt%, the content of cyclic ether organic solvent is 56.7 wt%, the content of Lewis acid lithium salt initiator is 11 wt%, more The content of the lithium salt solute is 1...
Embodiment 3
[0066] Under an argon atmosphere, first dissolve 0.11g LiTFSI and 0.07g LiFSI in 0.82 g 1,4-butanediol glycidyl ether in a glass vial, and add 0.02 g of SiO with a particle size of 50 nm 2 nanoparticles; then add 0.16g ionic liquid PI 13 FSI, uniformly mixed by magnetic stirring; finally, add 0.25g of Lewis acid lithium salt initiator LiClO 4 , dissolved completely by magnetic stirring to obtain 13 The trilithium salt gel-type ionic liquid electrolyte precursor solution of FSI, after standing for 5 days at room temperature, obtained PI-containing 13 FSI's triple lithium salt gel-type ionic liquid electrolyte. P.I. 13 The structure of the FSI is as follows:
[0067]
[0068] The containing PI 13In FSI's triple lithium salt gel-type ionic liquid electrolyte, the content of ionic liquid is 11.2 wt%, the content of cyclic ether organic solvent is 57.3 wt%, the content of Lewis acid lithium salt initiator is 17.5 wt%, more The content of the lithium salt solute is 12.6wt%,...
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