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Surface modified cyano frame material and preparation method and application thereof

A frame material and surface modification technology, applied in electrical components, electrochemical generators, battery electrodes, etc., can solve the problems of sodium-ion battery electrochemical performance degradation, easy to be corroded by electrolyte, unstable structure of cyano-based frame materials, etc. , to achieve the effects of fast deintercalation, improved electrochemical performance, and low cost

Active Publication Date: 2019-10-08
SHANGHAI HANHANG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure of the cyano-based framework material is unstable and easily corroded by the electrolyte, which leads to a decrease in the electrochemical performance of the sodium-ion battery.

Method used

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  • Surface modified cyano frame material and preparation method and application thereof
  • Surface modified cyano frame material and preparation method and application thereof
  • Surface modified cyano frame material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Dissolve sodium ferrocyanide decahydrate and sodium ferric pentacyanoammonium trihydrate in 1 liter of deionized water, and stir evenly to obtain concentrations of 0.495 mol / L and 0.495 mol / L in terms of ferrocyanide ion and pentacyanamide ion Solution I of 0.005mol / L; Manganous sulfate and zinc acetate are dissolved in 1 liter of deionized water to obtain 2+ Count and Zn 2+ The solutions with the concentration of 0.5mol / L and 0.05mol / L were obtained by fully stirring to obtain solution II; sodium chloride was dissolved in 1 liter of deionized water to obtain solution III with a concentration of 5mol / L; then, under constant stirring , Add solution I and solution II to solution III at the same time, and obtain a suspension through co-precipitation reaction at 85°C; then add 1.1 liters of 0.1mol / L sodium hydroxide solution to the above suspension, and then cool and wash , separation, and vacuum drying to obtain the ZnO-coated cyano-based framework material Na x Mn[Fe(CN...

Embodiment 2

[0048] Dissolve sodium ferrocyanide decahydrate and sodium ferric pentacyanoammonium trihydrate in 1 liter of deionized water, and stir evenly to obtain a concentration of 0.09mol / L and 0.09mol / L in terms of ferrocyanide ion and pentacyanamide ion Solution I of 0.01mol / L; Manganese nitrate and nickel acetate are dissolved in 1 liter of deionized water to obtain 2+ Calculated in Ni 2+ The concentration is respectively 0.1mol / L and the solution of 0.005mol / L, obtains solution II through thorough stirring; Sodium chloride is dissolved in 1 liter of deionized water, obtains the solution III that concentration is 5mol / L; Then under constant stirring , Add solution I and solution II to solution III at the same time, and obtain a suspension through co-precipitation reaction at 85°C; then add 0.105 liters of 0.1mol / L sodium hydroxide solution to the above suspension, and then cool and wash , separation, and vacuum drying to obtain the NiO-coated cyano-based framework material Na x M...

Embodiment 3

[0050] Sodium ferrocyanide decahydrate and sodium ferric pentacyanoammonium trihydrate were dissolved in 1 liter of deionized water, and stirred evenly to obtain a concentration of 0.19 mol / L and Solution I of 0.01mol / L; Manganous chloride and magnesium acetate are dissolved in 1 liter of deionized water to obtain Mn 2+ Calculated and in Mg 2+ The concentration is respectively 0.2mol / L and the solution of 0.03mol / L, obtains solution II through thorough stirring; Sodium chloride is dissolved in 1 liter of deionized water, obtains the solution III that concentration is 5mol / L; Then under constant stirring , Add solution I and solution II to solution III at the same time, and obtain a suspension through co-precipitation reaction at 85°C; then add 0.69 liters of 0.1mol / L sodium hydroxide solution to the above suspension, and then cool and wash , separation, and vacuum drying to obtain the MgO-coated cyano-based framework material Na x Mn[Fe(CN) 6 ] 0.95 [Fe(CN) 5 NH 3 ] 0.0...

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Abstract

The invention discloses a surface modified cyano frame material and a preparation method and application thereof. The method comprises the steps that sodium ferrocyanide and sodium pentacyanoferrate are mixed with deionized water to acquire a solution I; soluble divalent manganese salt and soluble divalent acetate are mixed with deionized water to acquire a solution II; sodium salt is mixed with deionized water to acquire a solution III; the solutions I and II are simultaneously dropped into the solution III, and co-precipitation reaction is carried out to acquire a suspension liquid containing the cyano frame material; sodium hydroxide is mixed with deionized water to acquire a solution IV; the solution IV is added to the suspension liquid dropwise, and thoroughly stirred and post-treatedat a certain temperature to acquire a surface-modified cyano frame material. According to the invention, through simultaneous doping and surface coating, the structural stability of the cyano frame material is effectively improved, and corrosion of an electrolyte on a product is inhibited.

Description

technical field [0001] The invention relates to the field of low-cost energy storage batteries, in particular to a surface-modified cyano-based framework material and its preparation method and application. Background technique [0002] Currently common energy storage batteries include lead-acid batteries and lithium-ion batteries. Although the cost of lead-acid battery is low, its energy density is low, its life is short, and it is easy to cause environmental pollution. Although lithium-ion batteries have high energy density and long service life, their cost is high and they are limited by lithium resources. In contrast, sodium-ion batteries have the advantages of abundant resources, good safety performance, low cost, and environmental friendliness, which are very suitable for large-scale energy storage applications. However, compared with lithium ions, sodium ions have a larger radius. In order to achieve excellent performance, the requirements for the material system ar...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054
CPCH01M4/366H01M4/58H01M4/628H01M10/054Y02E60/10
Inventor 庄大高石坚张银林郑文铨李伟华
Owner SHANGHAI HANHANG TECH CO LTD
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