161014-18-2Relevant articles and documents
Imidazole ionic liquid, ionic liquid electrolyte as well as preparation method and application thereof
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Paragraph 0098; 0099, (2018/10/02)
The invention provides imidazole ionic liquid. The structural formula of the ionic liquid is as follows: a formula is as shown in the description, wherein R1 is CH2(CH2)aO(CH2)bCH3; a is 0 or 1; b is0 or 1; R2 is CnH2n-1; n is 2 or 3; Y- is selected from one of BF4, PF6, TFSI or (FSO2)2N. The imidazole ionic liquid is subjected to triple substitution; meanwhile, different types of electron contributing groups are introduced into the imidazole ionic liquid, so that a saturated ether group structure and an unsaturated alkenyl structure are arranged at a site N-1 and a site N-3 of the imidazole ring; the ether group is introduced by selecting suitable parameters in the preparation process; when the ionic liquid is used as lithium-ion battery electrolyte, the electrochemical window of the electrolyte can be improved; when the ionic liquid is applied to high-voltage lithium-ion batteries taking LiNi0.5Mn1.5O4 as positive electrode materials, the safety and the electrochemical performance of the lithium-ion batteries can be improved. (The formula is shown in the description.).