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NaxMnyAlzO2@Na3V2(PO4)3 composite electrode material of sodium ion capacitor battery and application

A capacitor battery and composite electrode technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, can solve problems such as affecting electrochemical properties, low electronic conductivity, hindering development, etc. Simple and effective for improving the voltage platform

Active Publication Date: 2021-01-05
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, NVP has low electronic conductivity, which also seriously affects its electrochemical properties and hinders its further development

Method used

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  • NaxMnyAlzO2@Na3V2(PO4)3 composite electrode material of sodium ion capacitor battery and application
  • NaxMnyAlzO2@Na3V2(PO4)3 composite electrode material of sodium ion capacitor battery and application
  • NaxMnyAlzO2@Na3V2(PO4)3 composite electrode material of sodium ion capacitor battery and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Add 0.0135mol manganese acetate and 0.0045mol aluminum nitrate into 450mL water to be mixed with manganese acetate-aluminum nitrate;

[0029] (2) Sodium carbonate is mixed with 450mL concentration and is the sodium carbonate solution of 0.2mol / L, and adding mass concentration is 6% ammoniacal liquor 0.6mL, obtains sodium carbonate-ammonia mixed solution after mixing;

[0030] (3) Use a peristaltic pump to drop 450mL of sodium carbonate-ammonia mixed solution into 450mL of manganese acetate-aluminum nitrate mixed solution at a speed of 100mL / min, leave it to stand after stirring evenly, discard the supernatant, and centrifuge for 3 times, The centrifugation speed is 6000r / min, each centrifugation is 10 minutes, and the sediment is retained;

[0031] (4) Put the precipitate obtained by centrifugation into a petri dish, dry at 100°C for 20 hours, and grind to obtain Mn x al y o 2 binary material;

[0032] (5) with 0.012mol sodium carbonate, with all Mn obtained in ...

Embodiment 2

[0042] (1) Add 0.012mol manganese acetate and 0.006mol aluminum nitrate into 450mL water to be mixed with manganese acetate-aluminum nitrate;

[0043] (2) Sodium carbonate is mixed with 450mL concentration and is the sodium carbonate solution of 0.2mol / L, and adding mass concentration is 5% ammoniacal liquor 0.5mL, obtains sodium carbonate-ammonia mixed solution after mixing;

[0044] (3) Use a peristaltic pump to drop 450mL of sodium carbonate-ammonia mixed solution into 450mL of manganese acetate-aluminum nitrate mixed solution at a speed of 100mL / min, leave it to stand after stirring evenly, discard the supernatant, and centrifuge for 3 times, The centrifugation speed is 6000r / min, each centrifugation is 10 minutes, and the sediment is retained;

[0045] (4) Put the precipitate obtained by centrifugation into a petri dish, dry at 100°C for 20 hours, and grind to obtain Mn x al y o 2 binary material;

[0046] (5) with 0.012mol sodium carbonate, with all Mn obtained in st...

Embodiment 3

[0056] (1) Add 0.0144mol manganese acetate and 0.0036mol aluminum nitrate into 450mL water to be mixed with manganese acetate-aluminum nitrate;

[0057] (2) Sodium carbonate is mixed with 450mL concentration and is the sodium carbonate solution of 0.2mol / L, and adding mass concentration is 8% ammoniacal liquor 0.8mL, obtains sodium carbonate-ammonia mixed solution after mixing;

[0058] (3) Use a peristaltic pump to drop 450mL of sodium carbonate-ammonia mixed solution into 450mL of manganese acetate-aluminum nitrate mixed solution at a speed of 100mL / min, leave it to stand after stirring evenly, discard the supernatant, and centrifuge for 3 times, The centrifugation speed is 6000r / min, each centrifugation is 10 minutes, and the sediment is retained;

[0059] (4) Put the precipitate obtained by centrifugation into a petri dish, dry at 100°C for 20 hours, and grind to obtain Mn x al y o 2 binary material;

[0060] (5) with 0.012mol sodium carbonate, with all Mn obtained in ...

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Abstract

The invention relates to a NaxMnyAlzO2@Na3V2(PO4)3 composite electrode material of a sodium-ion capacitor battery and application. The material is prepared by the steps of dropwise adding sodium carbonate and ammonia water mixed solution into a manganese acetate and aluminum nitrate mixed solution, performing centrifugation, retaining precipitates, and performing drying to obtain a MnxAlyO2 binarymaterial; mixing sodium carbonate and a MnxAlyO2 binary material, adding absolute ethyl alcohol, stirring, and carrying out ultrasonic treatment at room temperature to form colloid; drying the colloid, and sintering the colloid in a muffle furnace to obtain a NaxMnyAlzO2 material; taking an HNO3-H2O2 mixed solution of the NaxMnyAlzO2 material and Na3V2(PO4)3 as a solvent, carrying out multi-stepmicrowave digestion, centrifuging, and reserving precipitates, thereby obtaining the composite electrode material. The method has the advantages that the method is simple, convenient and easy to operate, the material is applied to a sodium-ion capacitor battery, a charging and discharging voltage platform of the capacitor battery can be effectively improved, and the energy density is also improved.

Description

technical field [0001] The invention relates to a Na ion capacitor battery x mn y al z o 2 @Na 3 V 2 (PO 4 ) 3 Composite electrode materials and applications. Background technique [0002] Currently, sodium and lithium ions have similar chemical properties and are more abundant in the Earth's crust, making sodium one of the most attractive alternatives to lithium. However, compared with lithium-ion batteries, the existing sodium-ion batteries have lower energy density, which makes the research on sodium-ion cathode materials more extensive. [0003] Due to the advantages of low cost, environmental friendliness, and excellent safety performance, multi-element metal oxide materials are widely used in the positive electrode materials of capacitor batteries, but due to the low discharge potential and poor conductivity of nickel, the price of cobalt is high and the practicability is poor, etc. reasons hinder its development. At the same time, the polyanionic compound Na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/46H01G11/50H01G11/86
CPCH01G11/46H01G11/50H01G11/86
Inventor 蔡克迪张玉婷郎笑石李兰奚雪
Owner BOHAI UNIV