Antimony sulfide-based composite material, and preparation method and application thereof

A composite material, antimony sulfide-based technology, applied in the direction of electrochemical generators, active material electrodes, electrical components, etc., can solve the problems of lithium intercalation volume change, poor conductivity, etc., to achieve simple overall process, improved conductivity, lithium intercalation The effect of path shortening

Active Publication Date: 2020-12-11
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the above-mentioned problems, the present inventor has carried out intensive research, and has developed a kind of antimony sulfide-based composite material and its preparation method and application. After the suspension is mixed, it is hydrothermally treated and calcined. The obtained antimony sulfide-based composite material can be used as the negative electrode material of lithium ion or sodium ion battery, which can overcome the defects of poor conductivity and serious volume change of lithium intercalation in existing negative electrode materials, and can be prepared The method has simple technological process and low preparation cost, and the obtained composite material has excellent electrochemical performance as the negative electrode material, and is suitable for industrial promotion and application, thereby completing the present invention

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  • Antimony sulfide-based composite material, and preparation method and application thereof
  • Antimony sulfide-based composite material, and preparation method and application thereof
  • Antimony sulfide-based composite material, and preparation method and application thereof

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preparation example Construction

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

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

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

[0056] Step 1.1, adding natural stibnite to 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, adding natural stibnite to the aqueous solution of sulfide salt can make antimony sulfide and sulfide salt react to form [S...

Embodiment 1

[0119] 16.9g of natural stibnite was stirred and dissolved in 100ml of sodium sulfide solution with a concentration of 10mmol / L, left to stand for 1h and then centrifuged at 8000r to obtain solution A and stibnite residue (the 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) solution, sonicated for 2h, then centrifuged at 12000r for 5min, centrifuged 3 times, dried the obtained solid and added to 0.1mol / L, 250ml polydiallyldimethylammonium chloride (PDDA ) after being treated and centrifuged to obtain the treated multi-walled carbon nanotubes, and the treated multi-walled carbon nanotubes were dispersed in water to obtain a 5 mg / mL suspension of multi-walled carbon nanotubes;

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

[0122] The obtained mixed solution was fully mixed with 30mmol DMF soluti...

Embodiment 2

[0129] 16.9g of natural stibnite was stirred and dissolved in 100ml of sodium sulfide solution with a concentration of 10mmol / L, left to stand for 1h and then centrifuged at 8000r to obtain solution A and stibnite residue (the stibnite residue can be recycled);

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

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

[0132] Mix the obtained mixture with 100mmol DMF thoroughly, then add a total of 80ml of ultrapure water into a 100ml hydrothermal kettle,...

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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 stibniteand a carbon material, and specifically, a solution obtained by dissolving the natural stibnite is mixed with a suspension containing the carbon material, and hydrothermal treatment and calcination treatment are performed to obtain the antimony sulfide-based composite material. The antimony sulfide-based composite material provided by the invention takes natural stibnite as a raw material, avoidsthe problems of environmental pollution and high cost in the process of preparing high-purity antimony sulfide, is simple and efficient in technological process, greatly reduces the preparation cost,is stable and reliable, is wide in application range, and has a wide application prospect as a lithium ion or sodium ion battery negative electrode material.

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 easy to obtain and low in cost. Therefore, rechargeable sodium-ion batteries are the best choice to replace lithium-ion batteries one. [0003] Since sodium ions have an ionic radius 55% larger than th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/58H01M10/054
CPCH01M4/5815H01M4/625H01M4/628H01M10/054H01M2004/027Y02E60/10
Inventor 常兴华金胜明罗新元王辉
Owner CENT SOUTH UNIV
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