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Preparation method of LaCoO3 sub-micron sphere electrode material with porous structure

A porous structure, sub-micron technology, applied in the fields of hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, etc., can solve the problems of complex preparation process and method

Inactive Publication Date: 2016-09-07
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although perovskite metal oxides have been used in supercapacitor electrode materials, their preparation process and methods are relatively complicated. Therefore, it is of great significance to explore simple preparation methods of perovskite materials in supercapacitor electrode materials.

Method used

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  • Preparation method of LaCoO3 sub-micron sphere electrode material with porous structure
  • Preparation method of LaCoO3 sub-micron sphere electrode material with porous structure
  • Preparation method of LaCoO3 sub-micron sphere electrode material with porous structure

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Preparation of LaCoO 3 Precursor

[0029] Weigh 0.4330g La(NO 3 ) 3 9H 2 O, 0.2910g Co(NO 3 ) 3 ·6H 2 O was dissolved in 160ml of isopropanol solution, then 40ml of glycerin was added and stirred for 5 minutes, then 0.75g of PVP was added to the stirred solution and stirred for half an hour. The stirred solution was transferred to a 200ml hydrothermal kettle and placed in an oven at 180°C for 6 hours, and then naturally cooled to room temperature after the reaction. The synthesized precursor was separated with a centrifuge and washed with ethanol for 3 to 4 times, and dried in an oven at 70°C for no less than 12 hours. The dried sample has a highly uniform porous submicron spherical structure by SEM test, see the attached figure 1 .

[0030] (2) Heat treatment of LaCoO 3 Preparation of Porous LaCoO3 Submicron Spheres from Precursors

[0031] Will get LaCoO 3 The precursor is heat-treated in oxygen at a temperature of 600 °C, the heat treatment time is 1 ...

Embodiment 2

[0035] (1) Weigh 0.4330g La(NO 3 ) 3 9H 2 O, 0.2910gCo(NO 3 ) 2 ·6H 2 O was dissolved in 160ml of isopropanol solution, then 40ml of glycerin was added and stirred for 5 minutes, then 0.75g of PVP was added to the stirred solution and stirred for half an hour. The stirred solution was transferred to a 200ml hydrothermal kettle and placed in an oven at 180°C for 6 hours, and then naturally cooled to room temperature after the reaction. The synthesized precursor was separated with a centrifuge and washed with ethanol for 3 to 4 times, and dried in an oven at 70°C for no less than 12 hours.

[0036] (2) Heat treatment of LaCoO 3 Preparation of Porous LaCoO3 Submicron Spheres from Precursors

[0037] Will get LaCoO 3 The precursor is heat-treated in air, the heat-treatment temperature is 600°C, the heat-treatment time is 2 hours, and the heating rate is 1°C / min, to obtain LaCoO3 submicron spheres with a porous structure;

[0038] (3) Preparation of LaCoO 3 working electr...

Embodiment 3

[0041] (1) Weigh 0.4330g La(NO 3 ) 3 9H 2 O, 0.2910gCo(NO 3 ) 2 ·6H 2 O was dissolved in 160ml of isopropanol solution, then 40ml of glycerin was added and stirred for 5 minutes, then 0.75g of PVP was added to the stirred solution and stirred for half an hour. The stirred solution was transferred to a 200ml hydrothermal kettle and placed in an oven at 180°C for 6 hours, and then naturally cooled to room temperature after the reaction. The synthesized precursor was separated with a centrifuge and washed with ethanol for 3 to 4 times, and dried in an oven at 70°C for no less than 12 hours.

[0042] (2) Heat treatment of LaCoO 3 Preparation of Porous LaCoO3 Submicron Spheres from Precursors

[0043] Will get LaCoO 3 The precursor is heat-treated in air, the heat-treatment temperature is 600°C, the heat-treatment time is 3 hours, and the heating rate is 1°C / min to obtain porous LaCoO3 submicron spheres;

[0044] (3) Preparation of LaCoO 3 working electrode

[0045] The ...

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Abstract

This invention relates to a preparation method of LaCoO3 sub-micron sphere electrode material with a porous structure. The method comprises the following steps: dissolving La(NO3).6H2O and Co(NO3)2.6H2O in isopropyl alcohol to form transparent solution; adding glycerol to make the volume ratio of the glycerol and the isopropyl alcohol as 1:4; adding polyvinylpyrrolidone to stir and form homogeneous suspension; filling the suspension into a reaction kettle and reacting at 180 DEG C in an oven; centrifuging the reacted solution and performing centrifugal washing by ethyl alcohol; drying at 70 to 100 DEG C in the oven; putting the obtained reaction product in a tube furnace to perform warming heat treatment in the air so as to obtain the LaCoO3 sub-micron sphere with the porous structure; and making the LaCoO3 sub-micron sphere into the electrode material by a film pushing method. The preparation method provided by the invention firstly compounds the uniform LaCoO3 metal oxide sub-micron sphere with the porous structure through the solvent heating method; the material has the advantages of big specific surface area, good structure stability, good electrical conductivity, long cycling life, and so on.

Description

technical field [0001] The present invention relates to a supercapacitor electrode material and its preparation technology, in particular to a novel lanthanum cobaltate (LaCoO) with a porous structure for a supercapacitor electrode material 3 ) Preparation method of submicron spherical electrode material. Background technique [0002] With the increasing demand for energy and the continuous development of portable electronic devices, current energy storage devices such as lithium-ion batteries and hydrogen fuel cells have been difficult to meet people's requirements; The prospect of depletion and the widespread application of electric vehicles will inevitably require the development of a new generation of energy conversion and storage devices. Due to the advantages of high power density, excellent cycle life and high current charge and discharge, supercapacitors have become a research hotspot in the energy field in recent years. [0003] Supercapacitors are mainly divided ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/46H01G11/26H01G11/86
CPCY02E60/13H01G11/46H01G11/26H01G11/86
Inventor 张磊邵天岩郭亚洲刘婷翟张杰游慧慧
Owner TIANJIN UNIV