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A kind of preparation method of sodium ion battery cathode material na3v2(po4)3

A sodium-ion battery and positive electrode material technology, applied in the direction of battery electrodes, circuits, electrical components, etc., to achieve the effects of shallow embedding depth, high capacity charge and discharge, and large specific surface area

Active Publication Date: 2017-08-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

At present, the traditional solid-phase method is mainly used to prepare the positive electrode material Na for sodium ion batteries. 3 V 2 (PO 4 ) 3 , and the electrochemical properties such as the voltage of the sodium-ion battery cathode material prepared by this method need to be improved, therefore, it is of great significance to find a preparation method of a sodium-ion battery cathode material that can improve the electrochemical performance

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  • A kind of preparation method of sodium ion battery cathode material na3v2(po4)3
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  • A kind of preparation method of sodium ion battery cathode material na3v2(po4)3

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[0024] The invention provides a kind of sodium ion battery cathode material Na 3 V 2 (PO 4 ) 3 The preparation method, this method comprises the following steps:

[0025] (1) Mix sodium salt, vanadium salt, phosphate, complexing agent, polymer compound and solvent to obtain Na 3 V 2 (PO 4 ) 3 spinning solution;

[0026] (2) Na 3 V 2 (PO 4 ) 3 The spinning solution is electrospun to obtain Na 3 V 2 (PO 4 ) 3 Spinning precursor;

[0027] (3) Collect Na 3 V 2 (PO 4 ) 3 Spinning precursor, under an inert atmosphere for Na 3 V 2 (PO 4 ) 3The spinning precursor is heat-treated, and after cooling, the anode material Na for sodium-ion batteries is obtained. 3 V 2 (PO 4 ) 3 .

[0028] In the method of the present invention, there is no special requirement for sodium salt, vanadium salt, phosphate, complexing agent, polymer compound and solvent, can be various sodium salts, vanadium salt, phosphate, complexing agent, Polymer compounds and solvents. In order...

Embodiment 1

[0046] This embodiment is used to illustrate the sodium ion battery cathode material Na of the present invention 3 V 2 (PO 4 ) 3 method of preparation.

[0047] According to the ratio of substances n(Na):n(V):n(PO 4 3- ):n (citric acid)=3.2:2:3:3 Take by weighing 0.64g sodium hydroxide, 1.1698g ammonium metavanadate, 1.7254g ammonium dihydrogen phosphate and 2.8821g citric acid respectively, and dissolve into 10ml, 40ml respectively , 10ml, 10ml of deionized water, stirred at 70°C at a stirring speed of 500rpm for 1.5h until completely dissolved. Pour the sodium hydroxide solution, ammonium metavanadate solution, and ammonium dihydrogen phosphate solution into the citric acid solution, and stir at 80°C for 1.5h at a stirring speed of 500rpm to form a dark blue solution. Weigh 2 g of polyvinylpyrrolidone with an average molecular weight of 1,300,000 and dissolve it in 20 ml of deionized water, and stir at 25° C. at a stirring speed of 500 rpm for 6 h until completely diss...

Embodiment 2

[0053] This embodiment is used to illustrate the sodium ion battery cathode material Na of the present invention 3 V 2 (PO 4 ) 3 method of preparation.

[0054] Take by weighing 2.4176g sodium dihydrogen phosphate, 0.91g vanadium pentoxide and 0.9004g oxalic acid respectively by the amount ratio n (Na): n (V): n (oxalic acid)=3.1:2:2, and dissolve respectively 10ml, 40ml, and 10ml of deionized water were stirred at 60°C at a stirring speed of 400rpm for 2h until completely dissolved. Pour the sodium dihydrogen phosphate solution and the vanadium pentoxide solution into the oxalic acid solution, and stir at 60°C for 2 hours at a stirring speed of 400rpm to form a dark blue solution. Weigh 2g of polyethylene oxide with an average molecular weight of 600,000 and dissolve it in 20ml of deionized water, stir at 30°C at a stirring speed of 400rpm for 8h until completely dissolved. Add the above dark blue solution dropwise to the completely dissolved polyethylene oxide solution,...

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Abstract

The invention discloses a preparation method of a sodium-ion battery cathode material Na3V2(PO4)3. The method comprises the following steps: (1) mixing a sodium salt, a vandic salt, phosphate, a complexing agent, a high-molecular compound and a solvent to obtain a Na3V2(PO4)3 spinning solution; (2) carrying out electrostatic spinning on the Na3V2(PO4)3 spinning solution to obtain a Na3V2(PO4)3 spinning precursor; and (3) collecting the Na3V2(PO4)3 spinning precursor, carrying out thermal treatment on the Na3V2(PO4)3 spinning precursor in an inert atmosphere and cooling the Na3V2(PO4)3 spinning precursor to obtain the sodium-ion battery cathode material Na3V2(PO4)3. According to the sodium-ion battery cathode material Na3V2(PO4)3 prepared by the method disclosed by the invention, high-capacity charging and discharging of the battery can be realized; and the cycle stability of the battery can be improved.

Description

technical field [0001] The invention belongs to the field of chemical power sources and energy materials, and relates to a preparation method of a sodium ion battery electrode material, in particular to a sodium ion battery positive electrode material Na 3 V 2 (PO 4 ) 3 method of preparation. Background technique [0002] Energy is the material basis supporting the progress of the entire human civilization. With the rapid development of social economy, the dependence of human society on energy continues to increase. At present, traditional fossil energy sources such as coal, oil, and natural gas provide the main energy sources for human society. The consumption of fossil energy not only makes it increasingly exhausted, but also has a significant impact on the environment. Therefore, changing the existing unreasonable energy structure has become the primary problem facing the sustainable development of human society. At present, the vigorously developed wind energy, so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58
CPCY02E60/10
Inventor 吴川李慧吴锋白莹吴伯荣
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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