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A kind of nanometer Prussian blue sodium ion battery cathode material and preparation method thereof

A sodium-ion battery and positive electrode material technology, applied in battery electrodes, nanotechnology, nanotechnology, etc., can solve the problems of poor cycle stability and low Coulombic efficiency, and achieve stable voltage platform, high Coulombic efficiency, and low price.

Active Publication Date: 2020-12-18
广东钠壹新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: for the poor cycle stability of the sodium-ion battery with Prussian blue as positive electrode material in the prior art, the defect that Coulombic efficiency is low, one of the purposes of the present invention is to provide a kind of nano Prussian blue sodium-ion battery electrode material, described The electrode material is composed of Na x Fe[Fe(CN) 6 ] y ·nH 2 O, with high rate capability, superior cycle stability and Coulombic efficiency close to 100%

Method used

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  • A kind of nanometer Prussian blue sodium ion battery cathode material and preparation method thereof
  • A kind of nanometer Prussian blue sodium ion battery cathode material and preparation method thereof
  • A kind of nanometer Prussian blue sodium ion battery cathode material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] Weigh 0.4g polyvinylpyrrolidone ((C 6 h 9 NO) n ), 0.2g sodium dodecylbenzenesulfonate (C 18 h 29 NaO 3 S), 0.798g vitamin C (C 6 h 8 o 6 ) was added to 160mL deionized water, stirred to dissolve it, and obtained a transparent solution;

[0032] Weigh 0.484g sodium ferrocyanide (Na 4 Fe(CN)6 10H 2 O) be dissolved in above-mentioned solution, stir to make it dissolve, obtain sodium ferrocyanide aqueous solution;

[0033] Add 180mL of acetone and 30mL of acetic acid to the above mixed solution, stir and mix thoroughly to obtain a uniform salt solution;

[0034] The mixed solution was stirred at 400r / min at 80°C for 22h, then washed twice with water and once with ethanol, and washed with water and ethanol alternately until all organic matter was completely removed, and dried in vacuum at 100°C for 24h to obtain the sodium Ion battery electrode material Na 7.01 Fe[Fe(CN) 6 ] 2.49 1.28H 2 O's light blue powder.

[0035] The nanometer Prussian blue sodium ion ...

Embodiment 2

[0039] Weigh 0.4g of polyvinylpyrrolidone, 0.2g of sodium dodecylbenzenesulfonate, and 0.798g of vitamin C into 140mL of deionized water, stir to dissolve, and obtain a transparent solution;

[0040] Weigh 0.484g sodium ferrocyanide (Na 4 Fe(CN) 6 10H 2 O) be dissolved in above-mentioned solution, stir to make it dissolve, obtain sodium ferrocyanide aqueous solution;

[0041] Add 160mL ethanol and 30mL acetic acid to the above mixed solution, stir and mix thoroughly to obtain a uniform salt solution;

[0042] The mixed solution was stirred at 300r / min at 60°C for 20h, then washed twice with water and once with ethanol, and washed with water and ethanol alternately until all organic matter was completely removed, and dried in vacuum at 90°C for 20h to obtain the sodium Ion battery electrode material Na 6.98 Fe[Fe(CN) 6 ] 2.46 1.26H 2 O's light blue powder.

[0043] The nanometer Prussian blue sodium ion battery cathode material prepared by the present embodiment was tes...

Embodiment 3

[0047] Weigh 0.2g of polyvinylpyrrolidone, 0.2g of sodium dodecylbenzenesulfonate, and 0.798g of vitamin C into 140mL of deionized water, stir to dissolve, and obtain a transparent solution;

[0048] Weigh 0.363g sodium ferrocyanide (Na 4 Fe(CN) 6 10H 2 O) be dissolved in above-mentioned solution, stir to make it dissolve, obtain sodium ferrocyanide aqueous solution;

[0049] Add 140mL of acetic acid to the above mixed solution, stir and mix thoroughly to obtain a uniform salt solution;

[0050] The mixed solution was stirred at 600r / min at 85°C for 24h, then washed twice with water and once with ethanol, and washed with water and ethanol alternately until all organic matter was completely removed, and dried in vacuum at 85°C for 30h to obtain the sodium Ion battery electrode material Na 7.04 Fe[Fe(CN) 6 ] 2.48 1.32H 2 O's light blue powder.

[0051] The nanometer Prussian blue sodium ion battery cathode material prepared by the present embodiment was tested, and the r...

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Abstract

The invention discloses a nanometer prussian blue sodium ion battery positive electrode material and a preparation method thereof, and belongs to the technical filed of a sodium ion battery. The positive electrode material has the chemical composition of NaxFe[Fe(CN)6]y.nH2O. According to the preparation method, sodium ferrocyanide, non-ionic surfactants, anionic surfactants and reducing agents are dissolved into a mixed solution of water and organic solvent to obtain salt solutions; reaction is performed at certain temperature and time; solid precipitates are obtained; then, precipitates arewashed; vacuum drying is performed to obtain the positive electrode material. The positive material has the multiple characteristics of high volume, high circulation stability, high voltage platform and high coulombic efficiency, and belongs to a low-price and environmental-friendly novel energy storage sodium ion battery positive electrode material. The preparation method is simple; the control is easy; the used raw materials have wide distribution in the nature; the price is low; the environment-friendly effect is achieved; the performance of the prepared positive electrode material is stable.

Description

technical field [0001] The invention belongs to the technical field of sodium ion batteries, and more specifically relates to a nano Prussian blue sodium ion battery cathode material and a preparation method thereof. Background technique [0002] In today's society, the rapid development of portable electronic devices and electric vehicles has promoted the development of lithium-ion batteries. However, with the increasing demand for lithium resources, the shortage of lithium resources has seriously affected the development of lithium-ion batteries. There are sufficient reserves of sodium resources on the earth. Compared with lithium-ion batteries, the cost of sodium-ion batteries is lower, the potential of sodium-ion batteries is lower than that of lithium-ion batteries, and the safety performance is high. It has potential advantages in large-scale energy storage, so it has attracted widespread attention. . [0003] The cathode material of sodium ion battery is the key to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M10/054B82Y30/00
CPCB82Y30/00H01M4/362H01M4/58H01M10/054Y02E60/10
Inventor 王洁李澜王勇
Owner 广东钠壹新能源科技有限公司
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