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Preparation method of positive electrode catalyst Mn2O3 of lithium carbon dioxide battery

A carbon dioxide, battery cathode technology, applied in battery electrodes, fuel cell type half cells and secondary battery type half cells, circuits, etc., can solve the problems of high cost, short cycle life, unsuitable promotion, etc. Low cost, simple operation, good cycle performance and catalytic activity

Active Publication Date: 2018-01-09
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chen Liquan et al. (Energy & Environmental Science, 2014, 7: 677-681) lithium carbon dioxide battery uses Ketjen black as the positive electrode catalyst, the battery can only be operated at a small current density, the cycle life is short, and it can only cycle about 7 times under normal conditions
Zhou Haoshen et al. (Energy & Environmental Science, 2017, 10: 972-978) used Ru@Super P as the positive electrode catalyst, but ruthenium is a noble metal with high cost and is not suitable for promotion

Method used

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  • Preparation method of positive electrode catalyst Mn2O3 of lithium carbon dioxide battery
  • Preparation method of positive electrode catalyst Mn2O3 of lithium carbon dioxide battery
  • Preparation method of positive electrode catalyst Mn2O3 of lithium carbon dioxide battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of cathode catalyst Mn of lithium carbon dioxide battery 2 o 3 The preparation method, the steps are as follows:

[0024] 1) Dissolve 0.5g of PVP (polyvinylpyrrolidone) in 50ml of absolute ethanol to obtain mixed solution 1.

[0025] 2) Add 1g Mn(CH 3 COO) 2 4H 2 O (manganese acetate tetrahydrate) was dissolved in mixed solution 1 to obtain mixed solution 2.

[0026] 3) The above mixed solution 2 was magnetically stirred at 50°C and refluxed for 3 hours; after the reaction was completed, it was naturally cooled to room temperature to obtain a white precipitated product; Vacuum dried for 12 h to obtain a powdery precursor.

[0027] 4) Place 0.8 g of the precursor obtained above in a tube furnace in an air atmosphere and heat it to 500 °C at a heating rate of 0.5 °C / min, and keep it warm for 4 hours to obtain a porous lithium-carbon dioxide battery cathode catalyst material Mn 2 o 3 .

[0028] figure 1 for Mn 2 o 3 XRD (X-ray Diffraction) diffraction pa...

Embodiment 2

[0034] A kind of cathode catalyst Mn of lithium carbon dioxide battery 2 o 3 The preparation method, the steps are as follows:

[0035] 1) Dissolve 0.6g of PVP (polyvinylpyrrolidone) in 60ml of absolute ethanol to obtain mixed solution 1.

[0036] 2) Add 1.2g Mn(CH 3 COO) 2 4H 2 O (manganese acetate tetrahydrate) was dissolved in mixed solution 1 to obtain mixed solution 2.

[0037] 3) The above mixed solution 2 was magnetically stirred at 50°C and refluxed for 3 hours; after the reaction was completed, it was naturally cooled to room temperature to obtain a white precipitated product; Vacuum dried for 12 h to obtain a powdery precursor.

[0038] 4) Place 0.9 g of the precursor obtained above in a tube furnace in an air atmosphere and heat it to 600 °C at a heating rate of 0.5 °C / min, and keep it warm for 3 hours to obtain a porous lithium carbon dioxide battery cathode catalyst material Mn 2 o 3 .

[0039] The obtained Mn 2 o 3 The XRD diffractogram and SEM scannin...

Embodiment 3

[0044] A kind of cathode catalyst Mn of lithium carbon dioxide battery 2 o 3 The preparation method, the steps are as follows:

[0045] 1) Dissolve 0.8g of PVP (polyvinylpyrrolidone) in 80ml of absolute ethanol to obtain mixed solution 1.

[0046] 2) Add 1.5g Mn(CH 3 COO) 2 4H 2 O (manganese acetate tetrahydrate) was dissolved in mixed solution 1 to obtain mixed solution 2.

[0047] 3) The above mixed solution 2 was magnetically stirred at 50°C and refluxed for 3 hours; after the reaction was completed, it was naturally cooled to room temperature to obtain a white precipitated product; Vacuum dried for 12 h to obtain a powdery precursor.

[0048] 4) Place 0.8 g of the precursor obtained above in a tube furnace in an air atmosphere and heat it to 600 °C at a heating rate of 1 °C / min, and keep it warm for 3 hours to obtain a porous lithium-carbon dioxide battery cathode catalyst material Mn 2 o 3 .

[0049] The obtained Mn 2 o 3 The XRD diffractogram and SEM scanning ...

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Abstract

The invention discloses a preparation method of a positive electrode catalyst Mn2O3 of a lithium carbon dioxide battery. The method comprises the following steps of dissolving PVP into absolute ethylalcohol and then adding Mn(CH3COO)2.4H2O; carrying out magnetic stirring and reflux reaction at 40-80 DEG C to obtain a white precipitation product and carrying out vacuum drying to obtain a powdery precursor; and carrying out heat preservation in a tube furnace at 500-700 DEG C for 2-4h to obtain the positive electrode catalyst Mn2O3 of the lithium carbon dioxide battery. The positive electrode catalyst Mn2O3 of the lithium carbon dioxide battery is used for preparing a positive electrode of the lithium carbon dioxide battery. The materials are easy to obtain, and the method is simple in preparation process and technology, low in cost and friendly to environment.

Description

technical field [0001] The invention relates to a preparation method of a positive electrode catalyst of a lithium carbon dioxide battery, more specifically, relates to a preparation method of a rechargeable lithium carbon dioxide battery positive electrode catalyst capable of operating in pure carbon dioxide, and belongs to chemical power sources and related fields. Background technique [0002] With the increasingly serious global environmental pollution and energy crisis, it is imminent to develop clean and efficient energy storage systems. Some environmentally friendly and high-energy-density battery systems, such as Li-ion or Li-air batteries, have been developed to replace traditional fossil fuels. Unfortunately, because of the energy limitations of lithium-ion batteries, they cannot meet the needs of smart grids and electric vehicles for long-distance transportation. However, most of the current research on lithium-air batteries is limited to operation in pure oxygen...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90H01M12/08
CPCY02E60/10
Inventor 刘喜正鲁姗姗雷晓峰丁轶
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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