a li-co 2 Double metal oxide nanosheets for battery and its preparation method and application

A technology of bimetallic oxides and nanosheets, applied in the direction of nanotechnology for materials and surface science, fuel cell half-cells and primary battery half-cells, battery electrodes, etc., can solve the problem of battery failure Large breakthroughs, low conductivity and electrochemical activity, etc., to achieve the effect of diversification of drying methods

Active Publication Date: 2021-06-08
深圳万知达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But limited by CO 2 Low reduction reaction kinetics and Li 2 CO 3 Low conductivity and electrochemical activity, Li-CO 2 The battery has not yet made a major breakthrough

Method used

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  • a li-co <sub>2</sub> Double metal oxide nanosheets for battery and its preparation method and application
  • a li-co <sub>2</sub> Double metal oxide nanosheets for battery and its preparation method and application
  • a li-co <sub>2</sub> Double metal oxide nanosheets for battery and its preparation method and application

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Effect test

Embodiment 1

[0039] A Li-CO of the present invention 2 A method for preparing double metal oxide nanosheets for batteries, specifically comprising the following steps:

[0040] (1) Weigh Mg(NO 3 ) 2 and Al(NO 3 ) 3 9H 2 O is put into deionized water to obtain mixed metal salt solution, and the total metal ion concentration is 10mmol L -1 , the molar ratio of magnesium ions and aluminum ions is 1:2;

[0041] (2) Add urea to the mixed metal salt solution, and the quality of urea is 2 times that of the mixed metal salt;

[0042] (3) Heating the mixed dispersion to 80°C for hydrothermal reaction for 24 hours;

[0043](4) Centrifuge the product obtained in step (3), and repeatedly wash with deionized water until neutral, then freeze-dry for 48 hours;

[0044] (5) Calcining the product obtained in step (4) in a high-temperature box furnace under an air atmosphere at a temperature of 400°C for 12 hours to obtain Li-CO 2 Double metal oxide nanosheets for batteries.

[0045] Such as figu...

Embodiment 2

[0047] A Li-CO of the present invention 2 A method for preparing double metal oxide nanosheets for batteries, specifically comprising the following steps:

[0048] (1) Weigh NiCl 2 ·6H 2 O and MnCl 3 Put into deionized water to obtain mixed metal salt solution, the total metal ion concentration is 50mmol L -1 , the molar ratio of nickel ion and manganese ion is 5:1;

[0049] (2) add urea in mixed metal salt solution, urea quality is 6.6 times of mixed metal salt;

[0050] (3) Heat the mixed dispersion to 160°C for hydrothermal reaction for 5 hours;

[0051] (4) Centrifuge the product obtained in step (3), wash it repeatedly with deionized water until it is neutral, and dry it at 60°C for 24 hours;

[0052] (5) Calcining the product obtained in step (4) in a high-temperature box furnace under an air atmosphere at a temperature of 800°C for 1 hour to obtain Li-CO 2 Double metal oxide nanosheets for batteries.

[0053] Such as figure 2 Shown, the Li-CO prepared in Examp...

Embodiment 3

[0055] A Li-CO of the present invention 2 A method for preparing double metal oxide nanosheets for batteries, specifically comprising the following steps:

[0056] (1) Weigh CuCl 2 and VCl 3 Put into deionized water to obtain mixed metal salt solution, the total metal ion concentration is 50mmol L -1 , the molar ratio of copper ion and vanadium ion is 4:1;

[0057] (2) adding hexamethylenetetramine to the mixed metal salt solution, the quality of hexamethylenetetramine is 3 times that of the mixed metal salt;

[0058] (3) Heat the mixed dispersion to 120°C for hydrothermal reaction for 12 hours;

[0059] (4) The product obtained in step (3) was centrifuged, washed repeatedly with deionized water until neutral, and then vacuum-dried at 60°C for 24 hours;

[0060] (5) The product obtained in step (4) is calcined in an air atmosphere in a high-temperature box furnace at a temperature of 600°C for 12 hours to obtain Li-CO 2 Double metal oxide nanosheets for batteries.

[00...

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Abstract

The invention discloses a Li-CO 2 Double metal oxide nanosheets for batteries are prepared from two transition metal oxides. The two transition metal elements are divalent metal cations and trivalent metal cations, and the molar ratio of the divalent and trivalent metal cations is 1: 2 to 5:1. After scanning by electron microscope, it was found that it has a porous layered structure, and the internal metal oxides are dispersed in each other, which can provide more active sites for the battery reaction, thereby improving the performance of the battery. The invention also discloses its preparation method. Mix divalent metal salt and trivalent metal salt, and prepare layered double metal hydroxide through pH regulator and hydrothermal method. It can be decomposed into double metal oxide nanosheets, and the preparation process is simple, and the controllability and consistency are good. The invention also discloses that the double metal oxide nanosheet can be used as a battery positive electrode catalyst for Li-CO 2 battery.

Description

technical field [0001] The invention belongs to Li-CO 2 The field of battery technology, in particular to a Li-CO 2 Double metal oxide nanosheets for battery, preparation method and application thereof. Background technique [0002] The combustion and consumption of fossil fuels such as coal and oil not only cause resource depletion, but also cause CO 2 The resulting greenhouse effect has become a major bottleneck restricting economic and social development. Scientists used chemical adsorption, membrane separation or CO 2 Compression and other methods to capture CO 2 However, the above-mentioned technologies have the disadvantages of high cost and high energy consumption. At this stage, using zero energy consumption to use CO 2 , making it into a commercial product or even turning it into a green and efficient new power supply system raw material has become one of the key research topics for governments and scientific and technological workers in various countries. Li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/90H01M12/06B82Y30/00
CPCB82Y30/00H01M4/8605H01M4/8878H01M4/8882H01M4/9016H01M12/06
Inventor 王晓飞刘恬甜武瑶杨叶童张彦睿毋毅郭守武
Owner 深圳万知达科技有限公司
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