Modified nano sio 2 Particles, methods for their preparation, and nanofiber membranes, gel electrolytes, and lithium metal batteries comprising the same
A technology of gel electrolyte and nanofiber membrane, applied in its preparation method and nanofiber membrane containing it, gel electrolyte and lithium metal battery, and modified nano-SiO2 particles, which can solve the problems of small liquid absorption, battery short circuit, Problems such as high crystallinity, to achieve large porosity and gas permeability, improve ionic conductivity, and improve the effect of interaction
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Embodiment 1
[0079] This embodiment provides a modified nano-SiO 2 particles, including nano-SiO 2 Particles and grafting on nano-SiO 2 Ionic liquids on particles;
[0080] Wherein, the cation of the ionic liquid is 1-propyl(trimethoxy)silane-1-methylpiperidinium, and the anion of the ionic liquid is bistrifluoromethylsulfonimide anion.
[0081] This embodiment modified nano-SiO 2 Particles are prepared as follows:
[0082] (1) Dissolve N-methylpiperidine and 3-chloropropyltrimethoxysilane (molar ratio 1:1.1) in DMF respectively, and add N-methylpiperidine solution dropwise under nitrogen protection environment In 3-chloropropyltrimethoxysilane solution, stirred and reacted at 80°C for 1 day, the reaction product was washed, rotary evaporated and dried to obtain 1-propyl(trimethoxy)silane-1-methylpiperidinium Chloride (PPCl);
[0083] (2) PPCl obtained in step (1) is dissolved in water, and SiO is added dropwise 2 Colloid (particle size 20-100nm), stir evenly, react at 100°C for 12h...
Embodiment 2
[0086] This embodiment provides a modified nano-SiO 2 particles, including nano-SiO 2 Particles and grafting on nano-SiO 2 Ionic liquids on particles;
[0087] Wherein, the cation of the ionic liquid is 1-propyl(trimethoxy)silane-1-methylpiperidinium, and the anion of the ionic liquid is a bisfluorosulfonimide anion.
[0088] This embodiment modified nano-SiO 2 The preparation method of particles is as follows:
[0089] (1) Dissolve N-methylpiperidine and 3-chloropropyltrimethoxysilane (molar ratio 1:1.1) in DMF respectively, and add N-methylpiperidine solution dropwise under nitrogen protection environment In 3-chloropropyltrimethoxysilane solution, stirred and reacted at 75°C for 3 days, the reaction product was washed, rotary evaporated and dried to obtain 1-propyl(trimethoxy)silane-1-methylpiperidinium Chloride (PPCl);
[0090] (2) PPCl obtained in step (1) is dissolved in water, and SiO is added dropwise 2 Colloid (particle size 20-100nm), stir evenly, react at 70°...
Embodiment 3
[0093] This embodiment provides a modified nano-SiO 2 particles, including nano-SiO 2 Particles and grafting on nano-SiO 2 Ionic liquids on particles;
[0094] Wherein, the cation of the ionic liquid is 1-propyl(trimethoxy)silane-1-methylpiperidinium, and the anion of the ionic liquid is difluorooxalate borate anion.
[0095] This embodiment modified nano-SiO 2 The preparation method of particles is as follows:
[0096] (1) Dissolve N-methylpiperidine and 3-chloropropyltrimethoxysilane (molar ratio 1:1.1) in DMF respectively, and add N-methylpiperidine solution dropwise under nitrogen protection environment In 3-chloropropyltrimethoxysilane solution, stirred and reacted at 85°C for 1.5 days, the reaction product was washed, rotary evaporated and dried to obtain 1-propyl(trimethoxy)silane-1-methylpiperidinium Chloride (PPCl);
[0097] (2) PPCl obtained in step (1) is dissolved in water, and SiO is added dropwise 2 colloid (particle size 20-100nm), stir evenly, react at 9...
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