Molecular sieve imidazole framework doped polymer solid electrolyte and preparation method thereof
A solid electrolyte and polymer technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, circuits, etc., can solve the problems of poor mechanical properties and low ionic conductivity, achieve excellent mechanical properties, improve ionic conductivity, and improve lithium The effect of ion transfer number
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[0038] A polymer solid electrolyte doped with a molecular sieve imidazole framework and a preparation method thereof, comprising the following steps:
[0039] 1. First, dissolve 0.0574-0.574g LiTFSI in 1mL 1-ethyl-3-methylimidazolium bis-trifluoromethanesulfonimide ionic liquid to obtain solution 1, and then dissolve 0.1-1g porous inorganic nanoparticles ZIF-90 Disperse in solution 1 and place it under vacuum at 80 to 180 ° C for drying for 6h to 72h to obtain mixed solution 2. The mixed solution 2 is centrifuged and washed with anhydrous acetonitrile, and dried to obtain ZIF-90 coated ionic liquid solid powder ( ZIF-90@IL);
[0040] 2. Add 0.02~0.2g ZIF-90@IL and 0.08~0.4g lithium salt into 10mL organic solvent in turn to obtain mixed solution 3, and then add 0.4g PS-PEO to mixed solution 3 to obtain mixed solution 4, after After dissolving PS-PEO with magnetic stirring, the mixed solution 4 was cast in a polytetrafluoroethylene mold, and the solvent was volatilized under va...
Embodiment 1
[0043] 1. First dissolve 0.0574g LiTFSI in 1mL 1-ethyl-3-methylimidazolium bis-trifluoromethanesulfonimide ionic liquid to obtain solution 1, and then disperse 0.1g porous inorganic nanoparticles ZIF-90 in solution 1 Mixed liquid 2 was obtained after 12 h under vacuum at 120 °C, and the mixed liquid 2 was centrifuged and washed with anhydrous acetonitrile, and dried to obtain a solid powder ZIF-90@IL.
[0044] 2. Add 0.05g ZIF-90@IL and 0.1g LiTFSI into 10mL tetrahydrofuran in turn to obtain mixed solution 3, then add 0.4g PS-PEO to mixed solution 3 to obtain mixed solution 4, and dissolve PS-PEO through magnetic stirring The mixed solution 4 was cast in a polytetrafluoroethylene mold, and the solvent was volatilized under vacuum conditions at room temperature to form, then placed in a vacuum state, dried and cured at 60 °C for 5 hours to obtain a molecular sieve imidazole framework-doped polymer solid electrolyte.
[0045] figure 1 The SEM image of the ZIF-90@IL particles pr...
Embodiment 2
[0050] 1. First, dissolve 0.1148g LiFSI in 1mL 1-ethyl-3-methylimidazolium bis-trifluoromethanesulfonimide ionic liquid to obtain solution 1, and then disperse 0.2g porous inorganic nanoparticles ZIF-90 in solution 1 Mixed liquid 2 was obtained after 6 h under vacuum at 120 °C, and the mixed liquid 2 was centrifuged and washed with anhydrous acetonitrile, and dried to obtain a solid powder ZIF-90@IL.
[0051] 2. Add 0.04g ZIF-90@IL and 0.15g LiFSI to 10mL of dichloromethane in turn to obtain mixed solution 3, then add 0.4g PS-PEO to mixed solution 3 to obtain mixed solution 4, and dissolve PS-PEO through magnetic stirring Then, the mixed solution 4 was cast in a polytetrafluoroethylene mold, and the solvent was volatilized and formed under vacuum conditions at room temperature, and then placed in a vacuum state, dried and cured at 30° C. for 30 hours to obtain the molecular sieve imidazole framework-doped polymer solid electrolyte.
[0052] Figure 8 The impedance spectrum of...
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