Surface-modified cyano-based framework material, preparation method and application thereof

A frame material and surface modification technology, applied in the direction of active material electrodes, electrical components, electrochemical generators, etc., can solve the problems of unstable structure, easy to be corroded by electrolyte, etc., achieve low cost, improve cycle stability, The effect of low energy consumption

Active Publication Date: 2019-09-10
SHANGHAI HANHANG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing cyano-based frame materials are structurally unstable and easily corroded by electrolytes

Method used

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  • Surface-modified cyano-based framework material, preparation method and application thereof
  • Surface-modified cyano-based framework material, preparation method and application thereof
  • Surface-modified cyano-based framework material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Dissolve sodium ferrocyanide decahydrate in 1 liter of deionized water, and stir evenly to obtain solution I with a concentration of 0.5 mol / L in terms of ferrocyanide ion; dissolve manganese sulfate and zinc acetate in 1 liter of deionized water , get Mn 2+ Count and Zn 2+ The solutions with the concentration of 0.495mol / L and 0.055mol / 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 by co-precipitation 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 0.99 Zn 0.01 Fe(CN) 6 , where the molar mass of ZnO is the same as that of Na x mn 0.99 Zn 0.01 Fe(CN) 6 The mol...

Embodiment 2

[0047] Dissolve sodium ferrocyanide decahydrate in 1 liter of deionized water, and stir evenly to obtain solution I with a concentration of 0.1 mol / L in terms of ferrocyanide ion; dissolve manganous chloride and magnesium acetate in 1 liter of deionized water In water, get Mn 2+ Calculated and in Mg 2+ The solutions with the concentration of 0.09mol / L and 0.015mol / 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 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 MgO-coated cyano-based framework material Na x mn 0.9 Mg 0.1 Fe(CN) 6 , where the molar mass of MgO is the same as that of Na x ...

Embodiment 3

[0049] Dissolve sodium ferrocyanide decahydrate in 1 liter of deionized water, and stir evenly to obtain a solution I with a concentration of 0.2 mol / L in terms of ferrocyanide ion; dissolve manganous nitrate and copper acetate in 1 liter of deionized water , get Mn 2+ Calculate and take Cu 2+ The concentration is respectively 0.19mol / L and the solution of 0.04mol / 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 CuO-coated cyano-based framework material Na x mn 0.95 Cu 0.05 Fe(CN) 6 , where the molar mass of CuO is the same as that of Na x mn 0.9...

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Abstract

The invention discloses a surface-modified cyano-based framework material, a preparation method and application thereof. The preparation method comprises the following steps: mixing sodium ferrocyanide and deionized water to obtain a solution I; mixing soluble bivalent manganese salt and soluble bivalent acetate with deionized water to obtain a solution II; mixing sodium salt with deionized waterto obtain a solution III; dropwise adding the solution I and the solution II into the solution III at the same time, carrying out a co-precipitation reaction to obtain a suspension liquid containing acyano-based framework material; mixing sodium hydroxide with deionized water to obtain a solution IV; dropwise adding the solution IV into the suspension, and fully stirring and after-treating at a certain temperature to obtain the surface-modified cyano-based framework material. According to the surface-modified cyano-based framework material, the preparation method and application thereof in the invention, through simultaneous doping and surface coating, the structural stability of the cyano-based framework is effectively improved, and the corrosion of the product by the electrolyte 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 frame 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 batteries is low, their energy density is low, their life is short, and they are 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, Na-ion batteries are very suitable for large-scale energy storage applications due to their abundant resources, good safety performance, low cost, and environmental friendliness. However, compared with lithium ions, sodium ions have a larger radius. In order to achieve excellent performance, the requirements for the material system are higher. Due t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/58H01M10/054
CPCH01M4/362H01M4/366H01M4/381H01M4/38H01M4/58H01M10/054H01M2004/028Y02E60/10
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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