Ag/SnS2@rGO, preparation method and application
A 1gsncl5·5h2o, flower-shaped technology, applied in the field of preparation, Ag/SnS2@rGO, can solve the problems of poor electrode stability and large volume change, and achieve strong crystallinity, high purity, and improved conductivity.
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[0031] The invention provides a kind of graphene self-assembled wrapped Ag ion modified curdled SnS 2 As the preparation method of sodium ion battery negative electrode material, comprise the following steps:
[0032] Step 1, Spherical SnS 2 Preparation of:
[0033] 0.1~1g SnCl 5 ·5H 2 O was mixed with 20ml polyvinyl alcohol to obtain solution A; 0.01-0.5g thioglycolic acid was mixed with 20ml polyvinyl alcohol to obtain solution B; 0.1-0.5g CTAB was mixed with 30ml polyvinyl alcohol to obtain solution C. Wherein, the concentration of solution A is 0.05-0.1ml / L; the concentration of solution B is 0.1-0.5ml / L;
[0034] Solution A and solution C were mixed at a volume ratio of 2:3 and then ultrasonically treated for 30 minutes to obtain product D;
[0035] Then mix the product D and the solution B at a volume ratio of 5:2 to obtain the product E; put the product E into the reaction kettle, and conduct a hydrothermal reaction at 150-220°C for 8-10 hours; After washing three...
Embodiment 1
[0045] (1) 0.1g of SnCl 5 ·5H 2 O, the mercaptoacetic acid of 0.01g and the CTAB of 0.1g melt into 20ml respectively, in the polyvinyl alcohol (PEG200) of 30ml respectively stir 30 minutes, then SnCl 5 ·5H 2 O and CTAB were mixed and sonicated for 30 minutes, then mixed with thioglycolic acid and stirred for 2 hours.
[0046] (2) Put the stirred solution into a 100 mL stainless steel reaction kettle and react at 200° C. for 10 hours. After the reaction, the solution was washed three times with water and alcohol, and then dried at 80°C to obtain flower-shaped SnS 2 .
[0047] (3) Tollens reagent: 50ml of 2% silver nitrate was placed in a 250ml beaker, and 1ml of 2% ammonia water was added and stirred until the brown color just disappeared to prepare Tollens reagent.
[0048] (4) Weigh 0.2g of flower-shaped SnS prepared in step 1 2 Add 10ml of Tollens reagent and stir gently for 30 minutes, add 3ml of formaldehyde dropwise and stir for 10 hours, finally, wash with water an...
Embodiment 2
[0055] (1) 0.4655g of SnCl 5 ·5H 2 O, the mercaptoacetic acid of 0.2579g and the CTAB of 0.35g melt into 20ml respectively, in the polyvinyl alcohol (PEG200) of 30ml respectively stir 30 minutes, then SnCl 5 ·5H 2 O and CTAB were mixed and sonicated for 30 minutes, then mixed with thioglycolic acid and stirred for 2 hours.
[0056] (2) Put the stirred solution into a 100 mL stainless steel reaction kettle and react at 200° C. for 10 hours. After the reaction, the solution was washed three times with water and alcohol, and then dried at 80°C to obtain flower-shaped SnS 2 .
[0057] (3) Tollens reagent: 50ml of 2% silver nitrate was placed in a 250ml beaker, and 1ml of 2% ammonia water was added and stirred until the brown color just disappeared to prepare Tollens reagent.
[0058] (4) Weigh 0.3g of flower-shaped SnS prepared in step 1 2 Add 20ml of Tollens reagent and stir gently for 30 minutes, drop a little formaldehyde and stir for 10 hours. Finally, wash with water an...
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