Water-based sodium ion total battery based on nickel prussian blue positive electrode material and preparation method and application thereof

A Prussian blue and cathode material technology, applied in the field of aqueous sodium-ion full batteries and their preparation, can solve the problems of limited lithium resource reserves, environmental pollution, and inability to support the application requirements of large-scale power storage systems, and achieve excellent electrochemical performance, The effect of wide application prospects

Inactive Publication Date: 2020-08-11
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing secondary battery system is difficult to meet the application requirements of large-scale power storage systems due to the limitation of raw materials
For example, lead-acid batteries contain a large amount of toxic heavy metal elements, and large-scale use will cause environmental pollution; nickel-metal hydride batteries and all-vanadium redox flow batteries use precious, toxic and rare metals, which limits their ability to be produced on a large scale; although lithium-ion batteries It has been widely used in people's daily life, but due to the limited reserves of lithium resources, the manufacturing cost of lithium-ion batteries is getting higher and higher, which cannot support the application requirements of large-scale power storage systems [4-6]

Method used

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  • Water-based sodium ion total battery based on nickel prussian blue positive electrode material and preparation method and application thereof
  • Water-based sodium ion total battery based on nickel prussian blue positive electrode material and preparation method and application thereof
  • Water-based sodium ion total battery based on nickel prussian blue positive electrode material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Synthesis of nickel Prussian blue positive electrode material: 5mmol nickel chloride hexahydrate and 25mmol sodium citrate dihydrate were dissolved in 50mL deionized water to form solution A; 5mmol sodium ferrocyanide decahydrate was dissolved in 50mL deionized water to Solution B was formed; solution C was formed by dissolving 5 g of polyvinylpyrrolidone and 10 g of sodium chloride in 100 mL of deionized water. Then, solutions A and B were slowly added dropwise to solution C simultaneously. After continuously stirring for 5 hours at room temperature and aging for 24 hours, the precipitate was centrifuged, washed with deionized water and ethanol three times each, and finally dried in a vacuum oven to obtain the obtained product.

[0052] The phase characterization of the prepared nickel Prussian blue cathode material was carried out, and the results were as follows: figure 1 As shown in a, the XRD pattern of the nickel Prussian blue cathode material splits at 24.5°, 39...

Embodiment 2

[0056] Synthesis of carbon-coated sodium titanium phosphate negative electrode material: first slowly add 4mmol tetrabutyl titanate into 40mL ethylene glycol and vigorously stir to form solution A. 2mmol sodium dihydrogen phosphate, 4mmol phosphoric acid and 2mmol glucose were dissolved in 40mL deionized water to form solution B, which was poured into solution A and stirred continuously for 1h. Then the above mixed solution was transferred to a 100 mL autoclave for 12 h at 180 °C. After the reaction was completed, the solution was evaporated to dryness at 120° C. in a blast drying oven. Finally, the evaporated residue was preheated at 350° C. for 2 h in an argon atmosphere, and annealed at 700° C. for 4 h to obtain the obtained product.

[0057] The phase characterization of the prepared carbon-coated sodium titanium phosphate anode material was carried out, and the results were as follows: image 3 As shown in a, the XRD pattern shows that all diffraction peaks point to the...

Embodiment 3

[0061] The nickel Prussian blue positive electrode material prepared in Example 1 was mixed with a conductive agent (Ketjen black powder) and a binder (60% polyperfluoroethylene dispersion) in a mass ratio of 7:2:1 to make a slurry, Add ethanol solvent to grind and mix to obtain a mixed solution, and use a roller press to load the mixed solution on a stainless steel current collector to make a positive electrode sheet; follow the same method to replace the nickel Prussian blue positive electrode material prepared in Example 2 with carbon-coated titanium phosphate Negative sheet was prepared after sodium negative electrode material.

[0062] The electrochemical performance of the electrode sheet was tested in a three-electrode system. The electrode sheet was used as the working electrode, the activated carbon electrode sheet was used as the auxiliary electrode, and the Ag / AgCl electrode was used as the reference electrode. -1 NaClO 4 The solution was tested using an electroche...

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Abstract

The invention discloses a water-based sodium ion total battery based on a nickel prussian blue positive electrode material and a preparation method and application thereof, and belongs to the field oflarge-scale energy storage. According to the invention, sodium citrate is added as a chelating agent and polyvinylpyrrolidone is added as a surfactant to control the growth process of the Prussian blue material in the process of preparing the Prussian blue positive electrode material by a coprecipitation method, and finally, the monoclinic phase nickel Prussian blue nanocube is synthesized. The carbon-coated sodium titanium phosphate negative electrode material, a carbon-coated sodium titanium phosphate negative electrode material and a water-soluble sodium salt electrolyte are assembled intoa low-cost and high-performance water-based sodium ion battery by taking the carbon-coated sodium titanium phosphate negative electrode material as a positive electrode material. The method is expected to be applied to a large-scale energy storage system to promote the development of new energy and renewable energy industries.

Description

technical field [0001] The invention belongs to the field of large-scale energy storage, and in particular relates to an aqueous sodium-ion full battery based on a nickel-Prussian blue positive electrode material and a preparation method and application thereof. Background technique [0002] At present, the energy depletion and pollution caused by the excessive use of fossil energy have seriously affected the living environment of human beings. For the sustainable development of human society, it is necessary to vigorously develop renewable clean energy such as wind energy, solar energy, tidal energy, and geothermal energy. However, these clean energy sources are heavily dependent on natural conditions, and there are intermittent supply problems, which limit their large-scale application in energy systems. [1-3] . Therefore, in order to realize the large-scale application of renewable energy, key energy storage technologies must be addressed. [0003] Electrochemical energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M10/36C01C3/08
CPCC01C3/08C01P2002/72C01P2002/82C01P2002/85C01P2004/03C01P2004/04C01P2004/38C01P2006/40H01M4/58H01M10/36H01M2004/021H01M2004/028H01M2220/10Y02E60/10Y02P20/133
Inventor 朱楠沈刘学江禹马俊林孙同睿
Owner DALIAN UNIV OF TECH
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