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Preparation method of transition metal oxide nanosheet array @ carbon paper electrode

A technology of nanosheet arrays and transition metals, applied in battery electrodes, circuits, electrical components, etc., can solve the problem of large specificity of the substrate for growing active materials, achieve high specific capacity, facilitate penetration, and simple preparation process

Active Publication Date: 2019-12-03
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that most existing substrates used for growing active materials have relatively large proportions, and provide a method for growing transition metal oxide nanometers derived from paper towels. Chip array and directly used as electrode and preparation method thereof

Method used

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  • Preparation method of transition metal oxide nanosheet array @ carbon paper electrode
  • Preparation method of transition metal oxide nanosheet array @ carbon paper electrode
  • Preparation method of transition metal oxide nanosheet array @ carbon paper electrode

Examples

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Effect test

Embodiment 1

[0024] A method for preparing a transition metal oxide nanosheet array@carbon paper electrode material, the specific steps are:

[0025] (1) Weigh 388 mg of cobalt nitrate hexahydrate (Co 2 (NO 3 )•6H 2 O) and 161 mg copper nitrate trihydrate (Cu 2 (NO 3 )•3H 2 O) were added to beaker A filled with 40 mL of ultrapure water, and dissolved by ultrasonication for 5 minutes. Then, dissolve 1.32 g of 2-methylimidazole (2-MIM) into another beaker B filled with 30-60 mL of ultrapure water, and ultrasonically dissolve it. After that, under the condition of magnetic stirring, the solution in the B beaker was added to the A beaker at an even speed within 90s;

[0026] (2) Put a piece of clean paper towel into the mixed solution of step (1) and react at room temperature for 2 h. After the reaction is completed, wash it with ultrapure water and absolute ethanol for 4 to 5 times, and finally wash the sample placed in an oven to dry;

[0027] (3) Put the sample dried in step (2) int...

Embodiment 2

[0029] A method for preparing a transition metal oxide nanosheet array@carbon paper electrode material, the specific steps are:

[0030] (1) Weigh 194 mg of cobalt nitrate hexahydrate (Co 2 (NO 3 )•6H 2 O) and 81 mg copper nitrate trihydrate (Cu 2 (NO 3 )•3H 2 O) were added to beaker A filled with 30 mL of ultrapure water, and dissolved by ultrasonication for 5 minutes. Then, 0.66 g of 2-methylimidazole (2-MIM) was dissolved in another beaker B containing 30 mL of ultrapure water, and ultrasonically dissolved. After that, under the condition of magnetic stirring, the solution in the B beaker was added to the A beaker at an even speed within 90s;

[0031] (2) Put a piece of clean paper towel into the mixed solution of step (1) and react at room temperature for 3 h. After the reaction, rinse with ultrapure water and absolute ethanol for 4 to 5 times, and finally wash the sample placed in an oven to dry;

[0032] (3) Put the sample dried in step (2) into a porcelain boat,...

Embodiment 3

[0034] A method for preparing a transition metal oxide nanosheet array@carbon paper electrode material, the specific steps are:

[0035] (1) Weigh 582 mg of cobalt nitrate hexahydrate (Co 2 (NO 3 )•6H 2 O) and 242 mg copper nitrate trihydrate (Cu 2 (NO 3 )•3H 2O) Add to beaker A filled with 60 mL of ultrapure water respectively, and dissolve them by ultrasonication for 5 minutes. Then 2 g of 2-methylimidazole (2-MIM) was dissolved in another beaker B containing 60 mL of ultrapure water, and ultrasonically dissolved. After that, under the condition of magnetic stirring, the solution in the B beaker was added to the A beaker at an even speed within 90s;

[0036] (2) Put a piece of clean paper towel into the mixed solution in step (1) and react at room temperature for 1 h. After the reaction, rinse with ultrapure water and absolute ethanol for 4 to 5 times, and finally wash the sample placed in an oven to dry;

[0037] (3) Put the sample dried in step (2) into a porcelain...

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Abstract

The invention discloses a transition metal oxide nanosheet array @ carbon paper electrode material and a preparation method thereof, and belongs to the preparation field of negative electrode materials for lithium ion batteries. The preparation method comprises the following process: cobalt nitrate hexahydrate and copper nitrate trihydrate are dissolved in ultra-pure water A by an ultrasonic method, and 2-methylimidazole (2-MIM) is also dissolved in ultra-pure water B by the ultrasonic method; the solution B is added to the solution A under the condition of magnetic stirring; clean paper is added to the above mixed solution to react at room temperature and then rinsed and dried; and the dried sample is carbonized so as to obtain the Cu-doped Co / CoO nanosheet array @ carbon paper electrodematerial. According to the prepared electrode material, the porous nanosheet array is densely grown on the carbon paper substrate derived from the paper and the material can be directly used as the electrode and has higher specific capacity and cycle stability.

Description

technical field [0001] The invention belongs to the field of preparation of negative electrode materials for lithium ion batteries, and specifically relates to a transition metal oxide nanosheet array@carbon paper electrode material and a preparation method thereof. Background technique [0002] Lithium-ion batteries have been widely used in new energy electric vehicles and various portable electronic devices (mobile phones, laptops, camera) and other fields. However, people's demand for lithium-ion batteries continues to rise. From the perspective of negative electrodes, it is necessary to develop electrode materials with high reversible capacity, excellent rate performance and good cycle stability. Transition metal oxides have attracted widespread attention due to their high theoretical capacities. However, transition metal oxides have problems of volume expansion and low electrical conductivity during lithium intercalation / delithiation, so carbon composites are usually ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/52H01M4/62H01M10/0525
CPCH01M4/362H01M4/38H01M4/523H01M4/62H01M4/625H01M4/626H01M10/0525Y02E60/10
Inventor 蔡道平刘添庆朱龙珍陈奇俤詹红兵
Owner FUZHOU UNIV
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