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Sodium-ion battery negative electrode material and preparation method and application thereof

A technology of sodium ion battery and negative electrode material, applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems of small reversible capacity, poor cycle performance, etc., to improve cycle stability, simple equipment, increase specific capacity and Effects of Cyclic Stability

Inactive Publication Date: 2021-03-16
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of small reversible capacity and poor cycle performance in the current negative electrode materials of sodium ion batteries.

Method used

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  • Sodium-ion battery negative electrode material and preparation method and application thereof
  • Sodium-ion battery negative electrode material and preparation method and application thereof
  • Sodium-ion battery negative electrode material and preparation method and application thereof

Examples

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Embodiment 1

[0042] A preparation method of a negative electrode material for a sodium ion battery, comprising the steps of:

[0043] (1) Weigh 3g of potassium stannate and dissolve in 5mL of deionized water, weigh 2.88g of zinc sulfate and dissolve in 65mL of deionized water, mix after fully dissolving, place on a magnetic stirrer and stir at 28°C for 4 hours to obtain white The suspension was centrifuged, washed with water and washed with alcohol to obtain white cubic ZnSn(OH) 6 ;

[0044] (2) Weigh 1g of the prepared ZnSn(OH) 6and 0.5gPPy were dispersed in 500mL deionized water, placed on a magnetic stirrer at 80°C and stirred for 12h until the solution was a black suspension, then centrifuged, washed with water, and washed with alcohol to obtain carbon-coated cubic ZnSn(OH) 6 ;

[0045] (3) Weigh 100mg of carbon-coated cubic ZnSn(OH) 6 and 200mg thioacetamide were dispersed in 100mL ethanol, carried out vulcanization treatment in 90 ℃ oil bath by cooling reflux device for 2 hours, ...

Embodiment 2

[0047] A preparation method of a negative electrode material for a sodium ion battery, comprising the steps of:

[0048] (1) Weigh 3g of stannous chloride and dissolve in 20mL of deionized water, weigh 3g of zinc nitrate and dissolve in 80mL of deionized water, mix after fully dissolving, place on a magnetic stirrer at 20°C and stir for 24 hours to obtain a white suspension The turbid liquid is centrifuged, washed with water and washed with alcohol to obtain white cubic ZnSn(OH) 6 ;

[0049] (2) Weigh 1g of the prepared ZnSn(OH) 6 and 0.3g of PVP were dispersed in 300mL of deionized water, placed on a magnetic stirrer at 20°C and stirred for 24h until the solution was a black suspension, then centrifuged, washed with water, and washed with alcohol to obtain carbon-coated cubic ZnSn(OH) 6 ;

[0050] (3) Weigh 100mg of carbon-coated cubic ZnSn(OH) 6 and 30mg thioacetamide are dispersed in 100mL ethanol, carry out vulcanization treatment 24 hours in 85 ℃ of oil baths by cooli...

Embodiment 3

[0052] A preparation method of a negative electrode material for a sodium ion battery, comprising the steps of:

[0053] (1) Weigh 3g of stannous chloride and dissolve in 20mL of deionized water, weigh 3g of zinc nitrate and dissolve in 80mL of deionized water, mix after fully dissolving, place on a magnetic stirrer at 50°C and stir for 1 hour to obtain a white suspension The turbid liquid is centrifuged, washed with water and washed with alcohol to obtain white cubic ZnSn(OH) 6 ;

[0054] (2) Weigh 1g of the prepared ZnSn(OH) 6 and 2g of PVP were dispersed in 300mL deionized water, placed on a magnetic stirrer at 100°C and stirred for 1h until the solution was a black suspension, then centrifuged, washed with water, and washed with alcohol to obtain carbon-coated cubic ZnSn(OH) 6 ;

[0055] (3) Weigh 100mg of carbon-coated cubic ZnSn(OH) 6 and 500mg thioacetamide are dispersed in 100mL ethanol, carry out vulcanization treatment 0.5 hour in 100 ℃ of oil bath pans by coolin...

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Abstract

The invention relates to the technical field of sodium ion batteries, in particular to a sodium ion battery negative electrode material as well as a preparation method and application thereof. The preparation method comprises the following steps: fully dissolving a zinc source and a tin source, conducting mixing to prepare turbid liquid, conducting centrifuging, conducting washing with water, conducting washing with alcohol to obtain white cubic ZnSn(OH)6, dispersing the white cubic ZnSn(OH)6 and a carbon source in water, conducting heating, conducting stirring until the solution becomes blackturbid liquid, separating out a solid product, and washing the solid product to obtain carbon-coated cubic ZnSn(OH)6; and then dispersing the obtained product and a sulfur source in a solvent, then carrying out sulfurazation treatment, separating out a solid product after sulfuration treatment is completed, and carrying out drying. Aiming at the problems of relatively small reversible capacity, relatively poor cycle performance and the like of a current sodium ion battery negative electrode material, the carbon-coated cubic zinc tin sulfide is introduced as a negative electrode active material to prepare a binary metal sulfide system, so that the specific capacity and the cycle stability of the sodium ion battery can be remarkably improved.

Description

technical field [0001] The invention relates to the technical field of sodium ion batteries, in particular to a negative electrode material for a sodium ion battery and a preparation method and application thereof. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] With the increasing consumption of fossil energy and the environmental pollution caused by it, the development of clean energy has attracted more and more attention. However, new energy sources such as wind energy and solar energy cannot provide continuous and stable energy supply due to time and geographical constraints. Therefore, the development of high-performance energy storage technology has b...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M4/62H01M10/054B82Y40/00
CPCB82Y40/00H01M4/5815H01M4/625H01M4/628H01M10/054H01M2004/027H01M4/58H01M4/62Y02E60/10
Inventor 杨涛
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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