Carbon coated Na3VO4 composite anode material and preparation method and application thereof

A negative electrode material and carbon coating technology, applied in the field of electrochemical power supply, can solve the problems of unsatisfactory electrochemical performance and poor conductivity, and achieve the effects of good cycle performance, good uniformity and good repeatability

Inactive Publication Date: 2016-07-06
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Na 3 VO 4 Poor electrical conductivity, resulting in unsatisfactory electrochemical performance
Currently, about Na 3 VO 4 The research and application of anode materials for sodium ion batteries have not been reported yet

Method used

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  • Carbon coated Na3VO4 composite anode material and preparation method and application thereof
  • Carbon coated Na3VO4 composite anode material and preparation method and application thereof
  • Carbon coated Na3VO4 composite anode material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The material synthesis steps are as follows:

[0021] 1) Weigh 3mmol and 2mmol of sodium carbonate and ammonium metavanidate according to the molar ratio of 3:2, respectively, and dissolve them in beakers A and B with 10ml of distilled water, and stir on a magnetic stirrer for 40min to fully dissolve;

[0022] 2) Weigh 5mmol hexamethylenetetramine and dissolve it in the C beaker with 10ml distilled water, transfer the solution in the B and C beakers in step 1) to the A beaker, stir on a magnetic stirrer for 40min to obtain a uniform color solution;

[0023] 3) Transfer the homogeneously colored solution obtained in steps 1) and 2) to the lining of a 50ml hydrothermal kettle, add distilled water to 80% of its volume, react in a blast oven at 120°C for 24h, and then heat it at 180°C React in an air oven for 24 to 72 hours, then cool naturally to room temperature;

[0024] 4) adding citric acid with a theoretical carbon content of 10% to the product obtained in step 3); ...

Embodiment 2

[0028] The material synthesis steps are as follows:

[0029] 1) Weigh 6 mmol and 2 mmol of sodium acetate and ammonium metavanadate according to the molar ratio of 3:1 and dissolve them in beakers A and B filled with 10 ml of distilled water, and stir on a magnetic stirrer for 20 minutes to fully dissolve;

[0030] 2) Weigh 5mmol hexamethylenetetramine and dissolve it in the C beaker with 10ml distilled water, transfer the solution in the A and B beakers in step 1) to the C beaker, stir on a magnetic stirrer for 40min to obtain a uniform color solution;

[0031] 3) Transfer the homogeneously colored solution obtained in steps 1) and 2) to the lining of a 50ml hydrothermal kettle, and add distilled water to 80% of its volume, react in a blast oven at 120°C for 24h, and then heat it in a 180°C React in a blast oven for 24 to 72 hours, then cool to room temperature naturally;

[0032] 4) adding glucose with a theoretical carbon content of 10% to the product obtained in step 3);...

Embodiment 3

[0036] The material synthesis steps are as follows:

[0037] 1) Weigh 6 mmol and 1 mmol of sodium acetate and ammonium vanadium pentoxide according to the molar ratio of 6:1, respectively, and dissolve them in beakers A and B filled with 10 ml of distilled water, and stir on a magnetic stirrer for 20 minutes to fully dissolve;

[0038] 2) Weigh 5mmol hexamethylenetetramine and dissolve it in the C beaker with 10ml distilled water, transfer the solution in the A and B beakers in step 1) to the C beaker, stir on a magnetic stirrer for 40min to obtain a uniform color solution;

[0039] 3) Transfer the homogeneously colored solution obtained in steps 1) and 2) to the lining of a 50ml hydrothermal kettle, and add distilled water to 80% of its volume, react in a blast oven at 120°C for 24h, and then heat it in a 180°C React in a blast oven for 24 to 72 hours, then cool to room temperature naturally;

[0040] 4) adding sucrose with a theoretical carbon content of 10% to the product...

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Abstract

The invention provides a carbon coated Na3VO4 composite anode material and a preparation method thereof. The preparation method comprises the following steps of separately placing a sodium source, a vanadium source and hexamethylenetetramine in 10ml of distilled water, and stirring the distilled water for 40 minutes so that the sodium source, the vanadium source and the hexamethylenetetramine are fully dissolved; transferring the obtained mixed solution into a lining of a hydrothermal kettle, adding the distilled water into the linear in an amount of 80% of the volume, carrying out reaction in an air blower at 120 DEGC for 24 hours, carrying out reaction in the air blower at 180 DEG C for 24-72 hours, and naturally cooling the air blower to a room temperature to obtain a reaction liquid; and adding citric acid, sucrose or glucose into the above reaction liquid, stirring the reaction liquid to obtain an intermediate product, drying the intermediate product in a drying oven at 80 DEG C for 12 hours, and carrying out calcination in a nitrogen or argon protection atmosphere at 400-600 DEG C for 5-10 hours to obtain the carbon coated Na3VO4 composite material. The material is endowed with relatively high electrochemical performance when applied as an anode material of a sodium ion battery.

Description

technical field [0001] The present invention relates to a kind of novel sodium ion battery negative pole material, particularly relate to Na 3 VO 4 The / C composite negative electrode material belongs to the field of electrochemical power sources. technical background [0002] Lithium-ion batteries are the third generation of small batteries after nickel-cadmium batteries and nickel-hydrogen batteries. Because of their high energy density, high output voltage, small self-discharge, no memory effect, and wide operating temperature range (-20°C to 60°C ), excellent cycle performance, fast charging and discharging, high output power, long service life and other advantages have been widely used as power supplies for mobile devices such as laptops and mobile phones, and occupy a dominant position in the current energy storage market. However, due to the high cost of lithium elements and the shortage of lithium resources, the future development of lithium-ion batteries is severe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M10/05
CPCH01M4/366H01M4/5825H01M10/05Y02E60/10
Inventor 倪世兵唐俊张继成杨学林
Owner CHINA THREE GORGES UNIV
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