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Preparation method of LaNiO<3> submicron microsphere electrode material with hollow structure

An electrode material, sub-meter technology, applied in chemical instruments and methods, hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, etc., to achieve good structural stability, long cycle life, and good conductivity

Inactive Publication Date: 2016-05-25
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although perovskite has been reported as a supercapacitor electrode material, there is no method for preparing perovskite in large quantities for the preparation of supercapacitor electrode materials. important in terms of materials

Method used

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  • Preparation method of LaNiO&lt;3&gt; submicron microsphere electrode material with hollow structure
  • Preparation method of LaNiO&lt;3&gt; submicron microsphere electrode material with hollow structure
  • Preparation method of LaNiO&lt;3&gt; submicron microsphere electrode material with hollow structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Preparation of LaNiO 3 Precursor

[0037] Weigh 0.4330gLa(NO 3 ) 3 9H 2 O, 0.2910gNi(NO 3 ) 3 ·6H 2 O was dissolved in 160ml of isopropanol solution, then 40ml of glycerin was added and stirred for 5 minutes. 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 SEM image of the dried sample (instructions attached figure 1 ) has a highly uniform spherical structure and its size ranges from 800 to 1000 nm. .

[0038] (2) Heat treatment of LaNiO 3 Preparation of LaNiO with Hollow Structure from Precursor 3 Submicron sphere

[0039] Will get LaNiO 3The precursor was heat-treated in air, the heat-treatment temperature was 600°C, the heat-treatment time was 6 hours, and the heat...

Embodiment 2

[0043] (1) Preparation of LaNiO 3 Precursor

[0044] Weigh 0.4330gLa(NO 3 ) 3 9H 2 O, 0.2910gNi(NO 3 ) 3 ·6H 2 O was dissolved in 160ml of isopropanol solution, then 40ml of glycerin was added and stirred for 5 minutes. 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.

[0045] (2) Heat treatment of LaNiO 3 Preparation of LaNiO with Hollow Structure from Precursor 3 submicron spheres.

[0046] Will get LaNiO 3 The precursor was heat-treated in air, the heat-treatment temperature was 600°C, the heat-treatment time was 10 hours, and the heating rate was 1°C / min.

[0047] (3) Preparation of LaNiO 3 working electrode

[0048] LaNiO with a hollow structure as the active material 3 The sub...

Embodiment 3

[0050] (1) Preparation of LaNiO 3 Precursor

[0051] Weigh 0.4330gLa(NO 3 ) 3 9H 2 O, 0.2910gNi(NO 3 ) 3 ·6H 2 O was dissolved in 160ml of isopropanol solution, then 40ml of glycerin was added and stirred for 5 minutes. The stirred solution was moved to a 200ml hydrothermal kettle and placed in an oven at 120°C for 6 hours of reaction, 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.

[0052] (2) Heat treatment of LaNiO 3 Preparation of LaNiO with Hollow Structure from Precursor 3 submicron spheres.

[0053] Will get LaNiO 3 The precursor was heat-treated in air, the heat-treatment temperature was 600°C, the heat-treatment time was 10 hours, and the heating rate was 1°C / min.

[0054] (3) Preparation of LaNiO 3 working electrode

[0055] LaNiO with a hollow structure as the active material 3 T...

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Abstract

The invention relates to a preparation method of an LaNiO<3> submicron microsphere electrode material with a hollow structure. The method comprises the steps as follows: La(NO<3>)<3>.9H<2>O and Ni(NO<3>)<3>.6H<2>O are dissolved into isopropanol at the molar ratio of 1 to (1-0.8) and stirred to form a transparent solution; glycerin is added until the volume ratio of the glycerin to the isopropanol is 1 to 4; the solution is stirred to form a homogeneous suspension; the solution is enclosed into a reaction kettle for reaction at a reaction temperature of 120-250 DEG C for 6 hours; the solution is centrifuged and centrifugally washed with ethanol for 3-4 times; the product is put into an oven at 70 DEG C for drying for 12 hours or more; the heating rate of the obtained reaction product is 1 DEG C / min; the thermal treatment temperature is 550-650 DEG C; the thermal treatment time is 6-10 hours; and the product is fabricated into an electrode by a sheet driving method. The specific capacity of the LaNiO<3> submicron microsphere electrode material can be 408F / g at 20A / g under a high-current discharge condition and can still reach 82% of initial capacity at 2A / G after 5,000 cycles.

Description

technical field [0001] The invention relates to a supercapacitor electrode material and its preparation technology, in particular to a hollow structure LaNiO with high-quality specific capacity 3 Preparation method of sub-meter microspheres. 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 into two categories: one is based on carbon-based materials, whic...

Claims

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Application Information

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IPC IPC(8): H01G11/46H01G11/86C01G53/00
CPCY02E60/13H01G11/46C01G53/00H01G11/86
Inventor 张磊邵天岩郭亚洲翟张杰游慧慧
Owner TIANJIN UNIV
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