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Potassium-sodium-manganese-iron-based Prussian-blue electrode material, and preparation method and application thereof

A potassium-sodium-manganese-based, Prussian blue technology, applied in nanotechnology, battery electrodes, circuits, etc. for materials and surface science, can solve the problem of memory effect affecting the use of lead-acid batteries, safety problems, and environmental pollution. , to achieve the effect of easy industrialized continuous production, low cost, and increased specific surface area

Inactive Publication Date: 2017-03-29
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of materials such as lead and concentrated sulfuric acid causes safety problems in the manufacturing process, pollutes the environment, and has a short lifespan. The memory effect also affects the use of lead-acid batteries.

Method used

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  • Potassium-sodium-manganese-iron-based Prussian-blue electrode material, and preparation method and application thereof
  • Potassium-sodium-manganese-iron-based Prussian-blue electrode material, and preparation method and application thereof
  • Potassium-sodium-manganese-iron-based Prussian-blue electrode material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Put 0.8g of manganese chloride and 1.0g of sodium citrate into a 500mL beaker, add 200mL of deionized water, stir until dissolved to obtain solution A. Put 1.7g of potassium ferricyanide in a 500mL beaker and add 200mL of deionized water, stir until dissolved to obtain solution B. Then solution B was added to solution A, aged at room temperature for 12 hours, washed three times with water, washed three times with alcohol, and dried to obtain K x Na y MnFe(CN) 6 . K produced x Na y MnFe(CN) 6 See the XRD pattern of figure 1 , the resulting K x Na y MnFe(CN) 6 The TEM image is shown in figure 2 .

[0029] K prepared with this example x Na y MnFe(CN) 6 , Conductive carbon black and binder polyvinylidene fluoride are mixed in a mass ratio of 80:10:10, and deionized water is used as a solvent, coated on the aluminum foil, and vacuum-dried for 12 hours. Then use sodium perchlorate, PC, EC as the electrolyte, and the sodium sheet as the counter electrode...

Embodiment 2

[0031] Put 1.2g of manganese chloride and 2.6g of sodium citrate into a 500mL beaker and add 200mL of deionized water, stir until dissolved to obtain solution A. Put 1.7g of potassium ferricyanide in a 500mL beaker and add 200mL of deionized water, stir until dissolved to obtain solution B. Then add solution A (B) to solution B (A), age at 50°C for 12 hours, wash with water three times, wash with alcohol three times, and dry to obtain K x Na y MnFe(CN) 6 . K produced x Na y MnFe(CN) 6 See the XRD pattern of Figure 5 .

[0032] K prepared with this example x Na y MnFe(CN) 6 , Conductive carbon black and binder polyvinylidene fluoride are mixed in a mass ratio of 80:10:10, and deionized water is used as a solvent, coated on the aluminum foil, and vacuum-dried for 12 hours. Then use sodium perchlorate, PC, EC as the electrolyte, and sodium sheet as the counter electrode to carry out CV and constant current charge and discharge tests. The CV curve is shown in I...

Embodiment 3

[0034]Put 60g of manganese sulfate and 50g of sodium citrate in a container, add 5L of deionized water, stir until dissolved to obtain solution A. Put 150g of sodium ferrocyanide in a container and add 5L of deionized water, stir until dissolved to obtain solution B. Then add solution B to solution A, age at 30°C for 20 hours, wash with water three times, wash with alcohol three times, and dry to obtain K x Na y MnFe(CN) 6 .

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Abstract

The invention discloses a potassium-sodium-manganese-iron-based Prussian-blue electrode material, and a preparation method and application thereof, belonging to the technical field of synthesis of new-energy materials. According a technical scheme in the invention, the potassium-sodium-manganese-iron-based Prussian-blue electrode material has a general chemical formula of K<x>Na<y>MnFe(CN)<6>, wherein x and y are both more than 0 and less than 2; and the material has a cubic structure and a particle size of 10 to 200 nm. The invention also discloses the preparation method for the potassium-sodium-manganese-iron-based Prussian-blue electrode material and application of the material to the positive electrode of a sodium-ion battery. The potassium-sodium-manganese-iron-based Prussian-blue electrode material prepared in the invention has the cubic structure and a particle size of 10 to 200 nm; the nanometer three-dimensional structure of the material leads to increase in the specific surface area of the material and effective reduction in transfer distance of ions or electrons in the electrode material, so the rate performance and cycle stability of the electrode material are improved; and the electrode material has excellent electrochemical performance as a positive electrode material for the sodium-ion battery.

Description

technical field [0001] The invention belongs to the technical field of synthesis of new energy materials, and in particular relates to a potassium-sodium-manganese-iron-based Prussian blue electrode material and a preparation method and application thereof. Background technique [0002] With the increasing demand for energy in human society, energy and environmental issues have become prominent. Renewable energy such as wind energy and solar energy have also been greatly developed. The impact of weather and environment is very obvious. Renewable energy is discontinuous, unstable and uncontrollable features. At the same time, it also needs to be used like a power grid, which requires corresponding supporting equipment to store the obtained energy, thereby ensuring the stability and continuity of energy supply. With the operation and use of the smart grid, large-scale energy storage technology is also particularly critical. Secondary batteries can achieve high-efficiency con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M10/054B82Y30/00C01C3/12
CPCB82Y30/00C01C3/12H01M4/58H01M10/054H01M2004/021Y02E60/10
Inventor 刘阳何丹丹乔芸
Owner HENAN NORMAL UNIV
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