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a kind of znsno 3 Preparation method of nanorod material and its energy storage application

A nanorod and nanorod-shaped technology, which is applied in the field of preparation of ZnSnO3 nanorod materials, can solve the problems of poor cycle stability, easy to cause agglomeration, and fast reversible capacity decay, and achieve high capacity, stable electrochemical performance, and good cycle stability. Effect

Active Publication Date: 2022-04-29
HUBEI ENG UNIV
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Problems solved by technology

[0003] At present, the conventional method for preparing zinc-tin-oxygen composite materials is the hydrothermal method. The shape of the sample obtained by this method is a cubic particle structure, the particles are large, and it is easy to cause agglomeration
When applied to the negative electrode material of sodium ion battery, this material has problems such as large volume expansion, poor combination with binder and conductive agent, resulting in poor cycle stability and fast reversible capacity decay.

Method used

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  • a kind of znsno <sub>3</sub> Preparation method of nanorod material and its energy storage application
  • a kind of znsno <sub>3</sub> Preparation method of nanorod material and its energy storage application
  • a kind of znsno <sub>3</sub> Preparation method of nanorod material and its energy storage application

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Embodiment 1

[0035] At room temperature, 1.264g SnCl 4 ·5H 2 O (3.6mmol) and 0.896g NaOH (22.4mmol) were dissolved in 70mL of ultrapure water, and kept stirring for 0.5h under ice bath conditions at 0°C; then 20mL of 0.18mol·L -1 (3.6mmol) ZnSO 4 ·7H 2 O aqueous solution was slowly added dropwise to the reaction vessel, and after the drop was completed, the above mixed solution was continued to be stirred in an ice bath for 12 hours, and then transferred to a microwave reactor, the power was set to 300W, the temperature was raised to 180°C, and the temperature was kept for 5 hours. , to obtain a cloudy solution, the cloudy solution was centrifuged, washed three times with deionized water and absolute ethanol, and then dried at 80°C for 12 hours to obtain the precursor ZnSn(OH) 6 , the resulting precursor ZnSn(OH) 6 Move it to a tube furnace, raise the temperature to 500°C at a rate of 2°C / min under a nitrogen atmosphere, and keep it for 2 hours to obtain a white powdery ZnSnO 3 nanoma...

Embodiment 2

[0038] At room temperature, 1.264g SnCl 4 ·5H 2 O and 0.896g NaOH were dissolved in 70mL of ultrapure water, and kept stirring for 0.5h in an ice bath at 0°C; then 20mL of 0.18mol·L -1 ZnSO 4 ·7H 2O aqueous solution was slowly added dropwise to the reaction vessel, and after the drop was completed, the above mixed solution was continued to be stirred in an ice bath for 12 hours, and then transferred to a microwave reactor, the power was set to 300W, the temperature was raised to 110°C, and the temperature was kept for 8 hours. , to obtain a cloudy solution, the cloudy solution was centrifuged, washed three times with deionized water and absolute ethanol, and then dried at 80°C for 12 hours to obtain the precursor ZnSn(OH) 6 , the resulting precursor ZnSn(OH) 6 Move it to a tube furnace, raise the temperature to 600°C at a rate of 5°C / min under a nitrogen atmosphere, and keep it for 2 hours to obtain a white powdery ZnSnO 3 nanomaterials.

Embodiment 3

[0040] At room temperature, 1.264g SnCl 4 ·5H 2 O and 0.896g NaOH were dissolved in 70mL of ultrapure water, and kept stirring for 0.5h in an ice bath at 0°C; then 20mL of 0.18mol·L -1 ZnSO 4 ·7H 2 O aqueous solution was slowly added dropwise to the reaction vessel, and after the drop was completed, the above mixed solution was continued to be stirred in an ice bath for 12 hours, and then transferred to a microwave reactor, the power was set to 300W, the temperature was raised to 250°C, and the temperature was kept for 6 hours. , to obtain a cloudy solution, the cloudy solution was centrifuged, washed three times with deionized water and absolute ethanol, and then dried at 80°C for 12 hours to obtain the precursor ZnSn(OH) 6 , the resulting precursor ZnSn(OH) 6 Move it to a tube furnace, raise the temperature to 300°C at a rate of 10°C / min under a nitrogen atmosphere, and keep it warm for 3 hours to obtain a white powdery ZnSnO 3 nanomaterials.

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Abstract

The invention belongs to the technical field of sodium ion batteries, and specifically discloses a ZnSnO battery 3 Preparation method of nanorod material and its energy storage application. The present invention adopts microwave hydrothermal method to prepare ZnSnO 3 Nanorod material, the specific method is: mix sodium hydroxide, tin source and zinc source under ice bath conditions, and then obtain the precursor ZnSn(OH) under certain microwave hydrothermal conditions 6 , and then the resulting precursor ZnSn(OH) 6 Put it in a tube furnace, under the protection of an inert atmosphere, raise the temperature to 300-600°C, keep it warm for 2-10h, and get ZnSnO 3 nanorod material. The ZnSnO 3 When nanorod materials are used as anode materials for sodium-ion batteries, they have the characteristics of high capacity and good cycle stability. ‑1 The electrochemical performance is stable at a high current density, and the specific capacity remains at 430 mAh g after 100 cycles. ‑1 , the Coulombic efficiency is close to 100%.

Description

technical field [0001] The invention belongs to the technical field of sodium ion batteries, in particular to a ZnSnO 3 Preparation method of nanorod material and its energy storage application. Background technique [0002] The zinc-tin oxide composite material has high theoretical capacity (1317mA h / g) and high electrical conductivity (2.5×10 2 S / cm), low working potential, rich sources, low price and many other advantages, it is a promising electrode material for sodium ion batteries. [0003] At present, the conventional method for preparing zinc-tin-oxygen composite materials is the hydrothermal method. The morphology of the samples obtained by this method is a cubic particle structure, the particles are large, and they are easy to cause agglomeration. When applied to the anode material of sodium ion battery, this material has problems such as large volume expansion, poor combination with binder and conductive agent, resulting in poor cycle stability and fast reversib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485C01G19/00C01G19/02B82Y30/00B82Y40/00H01M10/054
CPCC01G19/00C01G19/02H01M4/485H01M10/054B82Y30/00B82Y40/00H01M2004/021H01M2004/027C01P2002/72C01P2004/04C01P2004/64C01P2006/40C01P2004/16Y02E60/10
Inventor 余佳阁余链操京峰丁瑜王锋杨雄王丽
Owner HUBEI ENG UNIV
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