Conductive high molecular polyaniline modified sodium vanadium phosphate anode material and preparation method thereof

A technology of conducting polymer and sodium vanadium phosphate, which is applied in the field of electrochemical power supply, can solve the problems of low electronic conductivity and poor high-rate performance, and achieve the effects of simple synthesis process, low cost, and reduced charge transfer resistance.

Active Publication Date: 2017-05-31
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The basic three-dimensional framework of sodium vanadium phosphate by VO 6 Octahedron and PO 4 The tetrahedra are connected to each other by oxygen atoms on the shared corners, and each metal V atom is surrounded by 6 PO 4 Surrounded by tetrahedrons, the electron transport in the V atom is isolated, resulting in extremely low electronic conductivity, which makes its large-rate performance poor

Method used

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  • Conductive high molecular polyaniline modified sodium vanadium phosphate anode material and preparation method thereof
  • Conductive high molecular polyaniline modified sodium vanadium phosphate anode material and preparation method thereof

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Embodiment 1

[0020] Sodium source Na 2 CO 3 , vanadium source NH 4 VO 3 and phosphorus source NH 4 h 2 PO 4 After ball milling in absolute ethanol medium with a molar ratio of 1.5:2:3, dry it, and pre-calcine it at 350°C for 6 hours under a nitrogen atmosphere to obtain a precursor; add 5 wt.% glucose to the precursor, ball mill After 2 hours, it was dried in an oven at 50°C; the obtained powder was sintered in a tube furnace at 700°C for 10 hours under a nitrogen atmosphere; after cooling, it was ground and sieved to obtain NVP / C. The resulting NVP / C was added to 200 mL of 1M HCl ethanol / water solution (volume ratio 1:1) and sonicated for 30 minutes. Add 5 wt.% AN to the suspension (the amount of aniline monomer added is 5wt.% of the total mass of the carbon-coated lithium vanadium phosphate NVP / C raw material), and stir at room temperature for 30 minutes. Then add APS according to the molar ratio of AN and APS of 1: 1.5, stir magnetically at 0~5°C for 6 hours to obtain a black sub...

Embodiment 2

[0022] Sodium source Na 2 CO 3 , vanadium source NH 4 VO 3 and phosphorus source NH 4 h 2 PO 4 After ball milling in absolute ethanol medium with a molar ratio of 1.5 : 2 : 3, dry it, and pre-calcine it at 350°C for 6 hours under a nitrogen atmosphere to obtain a precursor; add 5wt.% glucose to the precursor, and ball mill it for 2 After 1 hour, it was dried in an oven at 50°C; the obtained powder was sintered in a tube furnace at 700°C for 10 hours under a nitrogen atmosphere; after cooling, it was ground and sieved to obtain NVP / C. The resulting NVP / C was added to 200 mL of 1M HCl ethanol / water solution (volume ratio 1:1) and sonicated for 30 minutes to obtain a suspension. 8wt.% AN was added to the suspension (the amount of aniline monomer added was 8wt.% of the total mass of the carbon-coated lithium vanadium phosphate NVP / C raw material), and stirred at room temperature for 30 minutes. Then add APS according to the molar ratio of AN and APS of 1: 1.5, stir magnetic...

Embodiment 3

[0024] Sodium source Na 2 CO 3 , vanadium source NH 4 VO 3 and phosphorus source NH 4 h 2 PO 4 After ball milling in absolute ethanol medium with a molar ratio of 1.5 : 2 : 3, dry and pre-calcine at 350°C for 6 hours under a nitrogen atmosphere to obtain a precursor; add 5wt.% glucose to the precursor, and ball mill for 2 After 1 hour, it was dried in an oven at 50°C; the obtained powder was sintered in a tube furnace at 700°C for 10 hours under a nitrogen atmosphere; after cooling, it was ground and sieved to obtain NVP / C. The resulting NVP / C was added to 200 mL of 1M HCl in ethanol / water solution (volume ratio 1:1) and sonicated for 30 minutes. 11wt.% AN was added to the suspension (the amount of aniline monomer added was 11wt.% of the total mass of the carbon-coated lithium vanadium phosphate NVP / C raw material), and stirred at room temperature for 30 minutes. Then add APS according to the molar ratio of AN and APS of 1: 1.5, stir magnetically at 0~5°C for 6 hours to...

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Abstract

The invention provides a conductive high molecular polyaniline modified sodium vanadium phosphate anode material and a preparation method thereof. The method comprises the following steps: performing ball milling on sodium source Na2CO3, vanadium source NH4VO3 or V2O5 and phosphorous source NH4H2PO4 or (NH4)2HPO4 in an absolute ethyl alcohol medium for 6-10 hours, drying, and pre-roasting the obtained powder in a tube furnace to obtain a precursor; adding a carbon source into the precursor, performing ball milling, drying, and sintering in the tube furnace under nitrogen atmosphere to obtain a carbon cladding sodium vanadium phosphate sample; adding the carbon cladding sodium vanadium phosphate material into an alcohol / aqueous solution of hydrochloric acid, performing ultrasonic treatment to obtain suspended solids, adding aniline monomer (AN) and ammonium peroxydisulfate (APS), stirring to obtain a black substance, washing the black substance with deionized water and alcohol for multiple times, and drying in vacuum to obtain a polyaniline modified sodium vanadium phosphate sample; and performing drying, film stamping and film pressing to obtain an anode material pole piece of a sodium ion cell.

Description

technical field [0001] The invention relates to a conductive polymer polyaniline modified sodium vanadium phosphate cathode material and a preparation method thereof, belonging to the field of electrochemical power sources. Background technique [0002] In recent years, with the rapid development of electronic equipment, electric tools, and low-power electric vehicles, people have more and more demand for energy storage equipment. A necessary condition for society to achieve sustainable development. At present, lithium-ion batteries are the high-energy battery system with the brightest development prospects. However, there are few lithium resources on the earth. Coupled with the wide application of lithium-ion batteries, lithium resources are even more scarce, which is not suitable for large-scale energy storage. (Trona, the basic raw material of sodium, is about 3.0 to 4.0 times cheaper than lithium carbonate, the raw material of lithium.) Sodium-ion batteries based on sod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M10/054
CPCH01M4/362H01M4/5825H01M10/054Y02E60/10
Inventor 张露露周英贤杨学林马迪丁晓凯王吉青
Owner CHINA THREE GORGES UNIV
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