A kind of bentonite/sulfur composite material and its preparation method and application
A technology of composite materials and bentonite, applied in the direction of positive electrodes, active material electrodes, structural parts, etc., can solve the problems of poor electrical conductivity, narrow ion transmission channels, etc., and achieve the effect of improving thermal stability
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Embodiment 1
[0040] Add 5g of bentonite to 50mL of 1M LiCl aqueous solution, stir at 60°C for 2h, filter, and wash the filter cake repeatedly with deionized water until no chloride ions exist in the washing liquid.
[0041] Add the washed filter cake to 500mL deionized water, stir for 1h to obtain a suspension with a mass fraction of 1wt%; heat the above suspension to 60°C, 3+ The ratio of / g bentonite, slowly add the polymerized hydroxyaluminum ion intercalation agent, stir while adding, continue to be 1:1 according to the ratio of chitosan and bentonite mass ratio, slowly add the concentration of 1wt% to the suspension Chitosan acetic acid solution (concentration of acetic acid is 1wt%), stir while adding, continue to stir at 60 ℃ for 6h after the acetic acid solution of chitosan is added, then stand and age at room temperature for 24h, filter, use deionized The filter cake was repeatedly washed with water until the washing solution became neutral, and then dried at 105° C. to obtain pol...
Embodiment 2
[0048] Compared with Example 1, the main difference is that at first the natural bentonite is subjected to sodium treatment.
[0049] Add 5g of bentonite to 50mL of 1M NaCl aqueous solution, stir at 60°C for 2h, filter, and wash the filter cake repeatedly with deionized water until no chloride ions exist in the washing liquid.
[0050] Add the washed filter cake to 500mL deionized water, stir for 1h to obtain a suspension with a mass fraction of 1wt%; heat the above suspension to 60°C, 3+ The ratio of / g bentonite, slowly add the polymerized hydroxyaluminum ion intercalation agent, stir while adding, continue to be 1:1 according to the ratio of chitosan and bentonite mass ratio, slowly add the concentration of 1wt% to the suspension Chitosan acetic acid solution (concentration of acetic acid is 1wt%), stir while adding, continue to stir at 60 ℃ for 6h after the acetic acid solution of chitosan is added, then stand and age at room temperature for 24h, filter, use deionized The...
Embodiment 3
[0056] Compared with Example 1, the main difference is that polymeric hydroxyl iron ions are used as the inorganic intercalation modifier.
[0057] Add 5g of bentonite to 50mL of 1M LiCl aqueous solution, stir at 60°C for 2h, filter, and wash the filter cake repeatedly with deionized water until no chloride ions exist in the washing liquid.
[0058] Add the washed filter cake to 500mL deionized water, stir for 1h to obtain a suspension with a mass fraction of 1wt%; heat the above suspension to 60°C, 3+ The ratio of / g bentonite, slowly add the polymeric hydroxyl iron ion intercalation agent, stir while adding, continue to be 1:1 according to the ratio of chitosan and bentonite mass ratio, slowly add the concentration of 1wt% to the suspension Chitosan acetic acid solution (concentration of acetic acid is 1wt%), stir while adding, continue to stir at 60 ℃ for 6h after the acetic acid solution of chitosan is added, then stand and age at room temperature for 24h, filter, use deio...
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