A kind of siloxane-based solid electrolyte and its preparation and application
A solid electrolyte, siloxane-based technology, used in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, circuits, etc., can solve the problems of solid electrolyte conductivity, compatibility, and mechanical properties that cannot be well matched, so as to improve contact performance, The effect of high electrical conductivity and improved compatibility
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Embodiment 1
[0030]Take 2g of hydrogen-containing siloxane (molecular weight 1900-2100g / mol), 10g of tris(2-methoxyethoxy)vinylsiloxane, and 0.12g of Castel catalyst into a two-necked flask, add 6g of anhydrous Toluene was used as a solvent, and the reflux reaction was carried out at 110° C. for 6 h under the protection of argon, and the colloidal polymer obtained was the lithium-conducting siloxane polymer. In an argon atmosphere, take 0.7g of the polymer, 0.25g of polymethyl methacrylate (molecular weight 1 million), 0.05g of LiN(SO 2 CF 3 ) 2 Dissolve in 10g of acetonitrile and stir until uniform. The solution stirred until uniform was cast-coated on the lithium iron phosphate positive electrode sheet, and dried at 60° C. for 50 h under a relative vacuum of -70KPa to obtain a positive electrode sheet coated with an electrolyte layer.
Embodiment 2
[0032] Take 2g of hydrogen-containing siloxane (molecular weight 1900-2100g / mol), 6g of vinyltriethoxysilane, and 0.24g of chloroplatinic acid catalyst in a two-necked flask, add 5.6g of anhydrous benzene as a solvent, and 80 DEG C of reflux reaction 48h, the colloidal polymer that obtains is lithium-conducting siloxane polymer. In a nitrogen atmosphere, take 0.5g of the polymer, 0.3g of PVDF (molecular weight 700,000), 0.2g of LiC 4 BO 8 Dissolve in 5g of N-methylpyrrolidone and stir until uniform. The solution that was stirred until uniform was cast-coated on stainless steel, and dried at 80°C for 36 hours under a relative vacuum of -85KPa to obtain an electrolyte film of a certain thickness.
Embodiment 3
[0034] Take 2g of hydrogen-containing siloxane (molecular weight 1900-2100g / mol), 8g of a mixture of vinyltriethoxysilane and tris(2-methoxyethoxy)vinylsiloxane, 0.5g of Catalyst and chloroplatinic acid catalyst are placed in two-necked flasks by the mixed catalyst of mass ratio 2:1 composition, add 10g Virahol as solvent, under the protection of helium 100 DEG C of reflux reaction 24h, the colloidal polymer that obtains is Conductive lithium siloxane polymer. In a helium atmosphere, take 0.3g of the polymer, 0.4g of a mixture of polymethyl methacrylate and PVDF (molecular weight: 300,000), 0.3g of LiC(SO 2 CF 3 ) 3 with LiC 4 BO 8 The mixture was dissolved in 1 g of dimethyl sulfoxide and stirred until homogeneous. The solution that was stirred until uniform was cast-coated on stainless steel, and dried at 100°C for 24 hours under a relative vacuum of -100KPa to obtain an electrolyte film of a certain thickness.
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