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Preparation method and application of graphene-coated tin oxide/tin disulfide nanoflowers as anode material for potassium ion battery

A technology of graphene coating and battery negative electrode, which is applied in the direction of nanotechnology for materials and surface science, battery electrodes, negative electrodes, etc., can solve the problem of low conductivity of sulfide, achieve uniform shape, high purity, strong crystallization effect

Active Publication Date: 2021-02-05
深圳万知达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But composite oxides and sulfides have relatively low conductivity

Method used

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  • Preparation method and application of graphene-coated tin oxide/tin disulfide nanoflowers as anode material for potassium ion battery
  • Preparation method and application of graphene-coated tin oxide/tin disulfide nanoflowers as anode material for potassium ion battery

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preparation example Construction

[0042] Please refer to the figure, the preparation method of graphene-coated tin oxide / tin disulfide nanoflowers of a kind of potassium ion battery anode material of the present invention comprises the following steps:

[0043] S1. Under magnetic stirring, dissolve sodium hydroxide in deionized water to obtain solution A, wherein the mass ratio of sodium hydroxide to deionized water is 1:40;

[0044] S2, under magnetic stirring, tin dichloride is dissolved in solution A to obtain solution B, and the mass ratio of tin dichloride to sodium hydroxide is (1.5~4):1;

[0045] S3. Transfer the B solution to a clean reaction kettle, place it in an oven at 120-200° C. for 12-24 hours, and then cool naturally at room temperature to obtain product C;

[0046] S4. Centrifuge the solvothermally synthesized product C at 8,000 to 10,000 rpm, wash with deionized water and ethanol repeatedly, and dry at 60 to 80°C for 6 to 24 hours to obtain product D;

[0047] S5. Dissolve D in 30 mL of deio...

Embodiment 1

[0058] (1) Under magnetic stirring, a certain amount of 1.2g of sodium hydroxide was dissolved in 30mL of deionized water to obtain solution A;

[0059] (2) under magnetic stirring, 1.8g tin chloride is dissolved in solution A to obtain solution B;

[0060] (3) Transfer the B solution to a clean reactor, place it in an oven at 200°C for 24 hours, and then cool it naturally at room temperature to obtain product C;

[0061] (4) The solvothermally synthesized product C was centrifuged at 8000 rpm, washed repeatedly with deionized water and ethanol, and dried at 60°C for 6 hours to obtain product D;

[0062] (5) Dissolve 0.28g of D into 30mL of deionized water and sonicate for 30min to obtain solution E;

[0063] (6) After the ultrasound is completed, under magnetic stirring, add 0.24 g of thioacetamide to solution E to obtain solution F;

[0064] (7) under magnetic stirring, in solution F, add 1 mL of graphene to obtain solution H;

[0065] (8) Transfer the H solution to a cle...

Embodiment 2

[0069] (1) Under magnetic stirring, a certain amount of 1.2g of sodium hydroxide was dissolved in 30mL of deionized water to obtain solution A;

[0070] (2) under magnetic stirring, 3.4g tin chloride is dissolved in solution A to obtain solution B;

[0071] (3) Transfer the B solution to a clean reactor, place it in an oven at 200°C for 24 hours, and then cool it naturally at room temperature to obtain product C;

[0072] (4) The solvothermally synthesized product C was centrifuged at 10,000 rpm, washed repeatedly with deionized water and ethanol, and dried at 80°C for 16 hours to obtain product D;

[0073] (5) Dissolve 0.8g of D in 30mL of deionized water and sonicate for 30min to obtain solution E;

[0074] (6) After the ultrasound is completed, under magnetic stirring, add 1.2 g of thioacetamide to solution E to obtain solution F;

[0075] (7) under magnetic stirring, in solution F, add the graphene of 5mL and obtain solution H;

[0076] (8) Transfer the H solution to a ...

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Abstract

The invention discloses a preparation method of a potassium ion battery negative electrode material graphene coated tin oxide / tin bisulfide nano-flower. A SnO2 / SnS2 nano-sheet is coated with grapheneand calcimined and self-assembled into the shape of the nano-flower in argon atmosphere. The nano-sheet with large specific surface area and good conductivity are provided by graphene, the nano-sheetis suitable for passing of K<+>, and the electric conductivity, the cycle performance and the rate performance of prepared active materials are better by the aid of synergistic effects of SnO2 / SnS2.

Description

technical field [0001] The invention belongs to the technical field of secondary power battery materials, and in particular relates to a graphene-coated SnO electrode material for a potassium ion battery 2 / SnS 2 Preparation method and application of rice flower. Background technique [0002] Lithium-ion batteries (LIBs) have developed rapidly in recent years to meet the energy demands of portable electronics and electric vehicles. However, the limited abundance and uneven distribution of Li resources hinder the further development of Li-ion batteries for large-scale energy storage. Potassium-ion batteries (KIBs) are considered as promising alternatives to LIBs due to their low-cost, abundant K source, and similar chemistry between K and Na and Li. To realize the practical application of potassium-ion batteries (KIBs), it is crucial and challenging to find suitable electrode materials with high rate, low cost and high capacity. [0003] SnO 2 It is an important battery ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/58H01M4/62H01M10/054B82Y30/00
CPCB82Y30/00H01M4/366H01M4/48H01M4/5815H01M4/625H01M10/054H01M2004/021H01M2004/027Y02E60/10
Inventor 锁国权李丹杨艳玲侯小江冯雷左玉王祎
Owner 深圳万知达科技有限公司
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