A kind of antimony sulfide-based composite material and its preparation method and application

Abstract

The invention discloses an antimony sulfide-based composite material and a preparation method and application thereof. The antimony sulfide-based composite material is prepared from natural stibnite and carbon materials. The suspension of the carbon material is mixed and then subjected to hydrothermal treatment and calcination to obtain the antimony sulfide-based composite material. The antimony sulfide-based composite material provided by the invention uses natural stibnite as raw material, avoids the problem of environmental pollution and high cost in the process of preparing high-purity antimony sulfide, and has a simple and efficient technological process, greatly reduces the preparation cost, and is stable and reliable. , the obtained antimony sulfide-based composite material has a wide range of applications, and has broad application prospects as a negative electrode material for lithium ion or sodium ion batteries.

Description

technical field

[0001] The invention relates to the field of battery electrode material preparation, in particular to an antimony sulfide-based composite material and a preparation method and application thereof. Background technique

[0002] In recent years, lithium-ion batteries have been widely used in electronic products such as smartphones and notebook computers, but the shortage and uneven distribution of lithium resources limit their development in large-scale energy storage and other fields. In the periodic table, sodium is next to lithium, and its standard electrode potential is close to that of lithium. In addition, sodium is one of the most abundant elements in the earth's crust. Compared with lithium resources with low reserves and difficult extraction, sodium is easily available and inexpensive. Therefore, rechargeable sodium-ion batteries are the best choice to replace lithium-ion batteries. one.

[0003] Since sodium ions have an ionic radius that is 55% lar...

Examples

preparation example Construction

[0053] The second aspect of the present invention provides a method for preparing an antimony sulfide-based composite material, preferably the method for preparing the antimony sulfide-based composite material described in the first aspect of the present invention, and the method includes the following steps:

[0054] Step 1. Process natural stibnite to form product A.

[0055] According to the present invention, in step 1, the processing of natural stibnite includes:

[0056] Step 1.1, adding natural stibnite into the medium to obtain a mixture;

[0057] According to the present invention, in step 1.1, the medium is an aqueous solution of sulfide salt, and the sulfide salt is preferably selected from one or more of sodium sulfide, potassium sulfide and ammonium sulfide.

[0058] In the present invention, the main component of natural stibnite is antimony sulfide, and adding natural stibnite into the aqueous solution of sulfide salt can make antimony sulfide react with sulfid...

Embodiment 1

[0119] Stir and dissolve 16.9g of natural stibnite in 100ml of sodium sulfide solution with a concentration of 10mmol / L, and centrifuge at 8000r after standing for 1 hour to obtain solution A and stibnite residue (stibnite residue can be recycled);

[0120] Add 0.5 g of multi-walled carbon nanotubes (MWCNTS) to 40 ml of H 2 SO 4 :HNO 3 (3:1) in the solution, sonicated for 2h, then centrifuged at 12000r for 5min, centrifuged 3 times, dried the obtained solid and added to 0.1mol / L, 250ml of polydiallyldimethylammonium chloride (PDDA ) after centrifugation to obtain the treated multi-walled carbon nanotubes, and the treated multi-walled carbon nanotubes are dispersed in water to obtain a 5 mg / mL multi-walled carbon nanotube suspension;

[0121] Add 5ml of 5mg / mL multi-walled carbon nanotube suspension to 50ml of solution A, and ultrasonically process for 1 minute to obtain a mixed solution;

[0122] The obtained mixed solution was fully mixed with 30 mmol DMF solution, and the...

Embodiment 2

[0129] Stir and dissolve 16.9g of natural stibnite in 100ml of sodium sulfide solution with a concentration of 10mmol / L, and centrifuge at 8000r after standing for 1 hour to obtain solution A and stibnite residue (stibnite residue can be recycled);

[0130] Add 0.3g of MWCNTs to 40ml of H 2 SO 4 :HNO 3 (3:1) in the solution, ultrasonicated for 2h, then centrifuged at 12000r for 5min, dried and added to 0.1mol / L polydiallyldimethylammonium chloride (PDDA) for treatment and centrifugation to obtain the treated walled carbon nanotubes, dispersing the treated multi-walled carbon nanotubes in water to obtain a 5 mg / mL multi-walled carbon nanotube suspension;

[0131] Add 5ml of 5mg / mL multi-walled carbon nanotube suspension to 50ml of solution A, and ultrasonically process for 1 minute to obtain a mixed solution;

[0132] The obtained mixture was fully mixed with 100 mmol DMF, then added to a hydrothermal kettle with a total of 80 ml to 100 ml of ultrapure water, placed in a bla...

technical field

[0001] The invention relates to the field of battery electrode material preparation, in particular to an antimony sulfide-based composite material and a preparation method and application thereof. Background technique

[0002] In recent years, lithium-ion batteries have been widely used in electronic products such as smartphones and notebook computers, but the shortage and uneven distribution of lithium resources limit their development in large-scale energy storage and other fields. In the periodic table, sodium is next to lithium, and its standard electrode potential is close to that of lithium. In addition, sodium is one of the most abundant elements in the earth's crust. Compared with lithium resources with low reserves and difficult extraction, sodium is easily available and inexpensive. Therefore, rechargeable sodium-ion batteries are the best choice to replace lithium-ion batteries. one.

[0003] Since sodium ions have an ionic radius that is 55% lar...

Examples

preparation example Construction

[0053] The second aspect of the present invention provides a method for preparing an antimony sulfide-based composite material, preferably the method for preparing the antimony sulfide-based composite material described in the first aspect of the present invention, and the method includes the following steps:

[0054] Step 1. Process natural stibnite to form product A.

[0055] According to the present invention, in step 1, the processing of natural stibnite includes:

[0056] Step 1.1, adding natural stibnite into the medium to obtain a mixture;

[0057] According to the present invention, in step 1.1, the medium is an aqueous solution of sulfide salt, and the sulfide salt is preferably selected from one or more of sodium sulfide, potassium sulfide and ammonium sulfide.

[0058] In the present invention, the main component of natural stibnite is antimony sulfide, and adding natural stibnite into the aqueous solution of sulfide salt can make antimony sulfide react with sulfid...

Embodiment 1

[0119] Stir and dissolve 16.9g of natural stibnite in 100ml of sodium sulfide solution with a concentration of 10mmol / L, and centrifuge at 8000r after standing for 1 hour to obtain solution A and stibnite residue (stibnite residue can be recycled);

[0120] Add 0.5 g of multi-walled carbon nanotubes (MWCNTS) to 40 ml of H 2 SO 4 :HNO 3 (3:1) in the solution, sonicated for 2h, then centrifuged at 12000r for 5min, centrifuged 3 times, dried the obtained solid and added to 0.1mol / L, 250ml of polydiallyldimethylammonium chloride (PDDA ) after centrifugation to obtain the treated multi-walled carbon nanotubes, and the treated multi-walled carbon nanotubes are dispersed in water to obtain a 5 mg / mL multi-walled carbon nanotube suspension;

[0121] Add 5ml of 5mg / mL multi-walled carbon nanotube suspension to 50ml of solution A, and ultrasonically process for 1 minute to obtain a mixed solution;

[0122] The obtained mixed solution was fully mixed with 30 mmol DMF solution, and the...

Embodiment 2

[0129] Stir and dissolve 16.9g of natural stibnite in 100ml of sodium sulfide solution with a concentration of 10mmol / L, and centrifuge at 8000r after standing for 1 hour to obtain solution A and stibnite residue (stibnite residue can be recycled);

[0130] Add 0.3g of MWCNTs to 40ml of H 2 SO 4 :HNO 3 (3:1) in the solution, ultrasonicated for 2h, then centrifuged at 12000r for 5min, dried and added to 0.1mol / L polydiallyldimethylammonium chloride (PDDA) for treatment and centrifugation to obtain the treated walled carbon nanotubes, dispersing the treated multi-walled carbon nanotubes in water to obtain a 5 mg / mL multi-walled carbon nanotube suspension;

[0131] Add 5ml of 5mg / mL multi-walled carbon nanotube suspension to 50ml of solution A, and ultrasonically process for 1 minute to obtain a mixed solution;

[0132] The obtained mixture was fully mixed with 100 mmol DMF, then added to a hydrothermal kettle with a total of 80 ml to 100 ml of ultrapure water, placed in a bla...

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