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Bifunctional material SnSe1-xSx and preparation method thereof

A technology of bifunctional materials and nanomaterials, applied in the field of preparation of bifunctional materials SnSe1-xSx, can solve problems such as gaps

Active Publication Date: 2021-09-14
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electrochemically, since Li 2 Se and Li 4.25 Formation of Sn with a theoretical capacity of 847 mA h g -1 , much higher than commercial graphite (372mA h g -1 ); in terms of thermoelectric applications, single crystal SnSe material obtained a higher dimensionless thermoelectric figure of merit (zT=2.6) at 923K; ​​polycrystalline SnSe also showed better zT, but there is still a gap compared with single crystal

Method used

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  • Bifunctional material SnSe1-xSx and preparation method thereof
  • Bifunctional material SnSe1-xSx and preparation method thereof
  • Bifunctional material SnSe1-xSx and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1: see Figure 1-6 , a bifunctional material SnSe with enhanced electrochemical storage and thermoelectric performance 1- x S x The preparation method, when x=0, concrete steps comprise:

[0024] 1) Take 10mmol SnCl 2 2H 2O was fully reacted with 100mmol NaOH in 50mL deionized water, and stirred at 600r / min under an argon atmosphere to obtain solution A;

[0025] 2) Take 10mmol Se and 26mmol NaBH 4 In 50mL of deionized water, stir with a magnetic stirrer at a stirring speed of 600r / min for 30min to obtain solution B;

[0026] 3) Inject B into solution A, and react for 2 hours at a stirring speed of 600r / min and a temperature of 130°C;

[0027] 4) After the above reaction was stopped and cooled for 30 minutes, the reaction solution was collected by centrifugation and dried on a freeze dryer for 48 hours to obtain the SnSe bifunctional material.

Embodiment 2

[0028] Example 2: see Figure 1-6 , a bifunctional material SnSe with enhanced electrochemical storage and thermoelectric performance 1- x S x The preparation method, when x=0.1, concrete steps comprise:

[0029] 1) Take 10mmol SnCl 2 2H 2 O was fully reacted with 100mmol NaOH in 50mL deionized water, and stirred at 600r / min under an argon atmosphere to obtain solution A;

[0030] 2) Take 9mmol Se and 23.4mmol NaBH 4 In 45mL of deionized water, stir with a magnetic stirrer at a stirring speed of 600r / min for 30min to obtain solution B;

[0031] 3) Take 2mmol Na 2 S·9H 2 O was dissolved in 5 mL of deionized water to obtain solution C;

[0032] 4) Mix B and C and inject into solution A, and react for 2 hours at a stirring speed of 600r / min and a temperature of 130°C;

[0033] 5) After the above reaction is stopped and cooled for 30 minutes, the reaction solution is collected by centrifugation and placed on a freeze dryer for 48 hours to obtain SnSe 0.9 S 0.1 Dual fun...

Embodiment 3

[0034] Embodiment 3: see Figure 1-6 , a bifunctional material SnSe with enhanced electrochemical storage and thermoelectric performance 1- x S x The preparation method, when x=0.2, concrete steps comprise:

[0035] 1) Take 10mmol SnCl 2 2H 2 O was fully reacted with 100mmol NaOH in 50mL deionized water, and stirred at 600r / min under an argon atmosphere to obtain solution A;

[0036] 2) Take 8mmol Se and 20.8mmol NaBH 4 In 40mL deionized water, stir at a stirring speed of 600r / min for 30min under a magnetic stirrer to obtain solution B;

[0037] 3) Take 4mmol Na 2 S·9H 2 O was dissolved in 10 mL of deionized water to obtain solution C;

[0038] 4) Mix B and C and inject into solution A, and react for 2 hours at a stirring speed of 600r / min and a temperature of 130°C;

[0039] 5) After the above reaction is stopped and cooled for 30 minutes, the reaction solution is collected by centrifugation and placed on a freeze dryer for 48 hours to obtain SnSe 0.8 S 0.2 Dual f...

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Abstract

The invention relates to a preparation method of a bifunctional material SnSe1-xSx, which comprises the following steps: sufficiently reacting SnCl2. 2H2O and NaOH in deionized water according to a molar ratio of 1:10, and stirring in an argon atmosphere to obtain a solution A; preparing a solution B according to the molar ratio of Se to NaBH4 of 1:2.6 in advance; dissolving a certain amount of Na2S.9H2O in a certain amount of water to obtain a solution C; mixing B and C, injecting into the solution A, keeping the stirring speed, and reacting at the boiling temperature; and after the reaction is stopped and cooled, centrifugally collecting, and drying on a freeze dryer to obtain the SnSe1-xSx bifunctional material. The controllable preparation of the nanoscale SnSe1-xSx material is realized, and the electrochemical and thermoelectric properties of the material are optimized at the same time.

Description

technical field [0001] The invention belongs to the field of functional materials, in particular to a dual-functional material SnSe with enhanced electrochemical storage and thermoelectric properties 1-x S x method of preparation. Background technique [0002] Lithium-ion battery is a very important energy storage device. It is widely used in power energy storage due to its characteristics of large specific energy, high operating voltage, wide operating temperature range, long cycle life, small self-discharge and environmental friendliness. Equipment, new energy vehicles, portable electronic devices. With the rapid development of electronic products, the storage performance requirements of batteries are getting higher and higher, such as longer running time or less frequent charging. Therefore, the current research focus turns to the integration of energy harvesting and storage technology, which is considered to be one of the most important energy-related technologies bec...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01L35/16H01L35/34
CPCH01M4/5815H10N10/852H10N10/01Y02E60/10
Inventor 韩广张虹李猛
Owner CHONGQING UNIV
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