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Prussian blue material and preparation method thereof

A Prussian blue and solution technology, applied in the field of Prussian blue material and its preparation, can solve problems such as unsatisfactory chemical and electrochemical stability of compounds, and achieve improved electrochemical performance, good chemical and electrochemical stability, and increased sodium content. Effect

Inactive Publication Date: 2019-08-02
SHANGHAI HANHANG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the chemical and electrochemical stability of these compounds are not ideal. Therefore, it is necessary to optimize the preparation process route to improve its electrochemical performance.

Method used

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  • Prussian blue material and preparation method thereof
  • Prussian blue material and preparation method thereof
  • Prussian blue material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Sodium ferrocyanide is dissolved in deionized water, stirred evenly to obtain solution I whose concentration is 0.03mol / L in terms of ferrocyanide ion; manganous chloride is dissolved in deionized water to obtain 2+ A solution with a metered concentration of 0.18mol / L, wherein the volume of the sodium ferrocyanide solution is 5 times the volume of the manganous chloride solution, and is fully stirred to obtain solution II; the sodium chloride is dissolved in deionized water to obtain a concentration of 0.3 mol / L solution III, wherein the volume of solution III is the same as that of solution I; then, under continuous stirring, add solution I and solution II to solution III at the same time, undergo co-precipitation reaction at 90°C, and then cool and wash , separated and dried to obtain the Prussian material Na x MnFe(CN) 6 .

[0026] figure 1 According to XRD analysis of the Prussian material prepared for this implementation, it is a monoclinic phase. figure 2 The...

Embodiment 2

[0036] Dissolve sodium ferrocyanide in deionized water, stir evenly to obtain a concentration of 0.1 in terms of ferrocyanide ion

[0037] Solution I of mol / L; Dissolve manganous sulfate in deionized water to obtain Mn 2+ A solution with a metered concentration of 0.33 mol / L, wherein the volume of the sodium ferrocyanide solution is 3 times the volume of the manganese sulfate solution, and is fully stirred to obtain solution II; the sodium fluoride is dissolved in deionized water to obtain a concentration of 0.3 mol / L solution III, wherein the volume of solution III is 3 times the volume of solution I; then, under continuous stirring, add solution I and solution II to solution III at the same time, undergo co-precipitation reaction at 70 ° C, and then cool and wash , separation, and drying to obtain the Prussian material Na with a monoclinic phase of micro-nano structure x MnFe(CN) 6. The electrochemical test shows that the initial capacity of the product can reach 141mAh / ...

Embodiment 3

[0039] Sodium ferrocyanide decahydrate is dissolved in deionized water, and stirred evenly to obtain solution I whose concentration is 0.3mol / L in terms of ferrocyanide ions; manganous nitrate is dissolved in deionized water to obtain 2+ A solution with a metered concentration of 0.3 mol / L, wherein the volume of the decahydrate sodium ferrocyanide solution is the same as that of the manganous nitrate solution, and the solution II is obtained through thorough stirring; the sodium acetate is dissolved in deionized water to obtain the solution III with a concentration of 0.6 , wherein the volume of solution III is 5 times the volume of solution I; then, under continuous stirring, solution I and solution II are added to solution III at the same time, and undergo co-precipitation reaction at 50°C, and then cool, wash, separate and dry A monoclinic Prussian material Na with micro-nano structure was obtained x MnFe(CN) 6 . The electrochemical test shows that the initial capacity of...

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Abstract

The invention discloses a prussian blue material and a preparation method thereof. The preparation method specifically includes the following steps: mixing sodium ferrocyanide with deionized water toobtain a solution I; mixing divalent manganese salt and deionized water to obtain a solution II; mixing sodium salt and deionized water to obtain a solution III; then simultaneously adding the solution I and the solution II into the solution III, and obtaining the prussian blue based material after co-precipitation. The prussian blue based material disclosed by the invention is applied into anodesof sodium-ion batteries, thereby greatly enlarging the capacity of sodium-ion batteries and remarkably improving the cycling stability.

Description

technical field [0001] The invention relates to the technical field of novel energy storage batteries, in particular to a Prussian blue material and a preparation method thereof. Background technique [0002] With the development of society and economy, energy consumption is increasing day by day, traditional fossil energy continues to decrease, and human consumption of traditional fossil energy has caused serious environmental pollution. Under this environment, clean, renewable and cheap new energy It has become the object of development by governments of various countries. At present, the proportion of wind energy, solar energy and ocean energy in energy consumption is constantly increasing. However, these renewable energy sources are greatly affected by weather and time periods, and are obviously unstable, discontinuous and irresistible. control characteristics, it is necessary to develop and build supporting electric energy storage (energy storage) devices, namely batter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C3/12H01M4/58H01M10/054
CPCC01C3/12H01M4/58H01M10/054C01P2002/72C01P2004/03C01P2006/40Y02E60/10
Inventor 石坚李伟华邵博言林汝琴李权
Owner SHANGHAI HANHANG TECH CO LTD
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