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Preparation method and application of phase-controllable manganese oxide

An oxide and phase technology, which is applied in the preparation/purification of carbon, chemical instruments and methods, manganese oxide/hydroxide, etc., can solve the problems of complex preparation process, consumption of large chemical substances and energy, etc., and achieve rich sources. , low cost, low price effect

Inactive Publication Date: 2018-09-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, many methods are used to synthesize or modify manganese oxide. Although the manganese oxide used in high-performance supercapacitors has made great progress, in all these common methods, the preparation process is mostly complicated and consumes a lot of chemical substances. and energy
Therefore, it remains challenging to develop manganese oxide materials with high specific capacitance and long cycle life at low cost and easy operation.

Method used

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  • Preparation method and application of phase-controllable manganese oxide

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Experimental program
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Embodiment 1

[0036]Five comparison experiments were set up: under the condition of 60ml water as solvent, 5mmol manganese chloride tetrahydrate provided manganese source, the amount of added carbon source glucose was 0mmol, 5mmol, 10mmol, 15mmol, 20mmol respectively, and in the presence of 100mmol urea , placed in a polytetrafluoroethylene-lined autoclave for hydrothermal reaction, centrifuged, washed and dried to obtain manganese carbonate@carbon composites.

[0037] figure 1 In (a) is the sample MnCO prepared without adding glucose 3 The scanning electron microscope figure, (b)-(e) is the preparation precursor MnCO of adding different content glucose in embodiment 1 3 SEM image of @C. from figure 1 It can be seen that the morphology of the manganese carbonate@carbon composite material is clearly visible. By comparing the graphs (a) and (b-e), it can be seen that the increase in the amount of glucose changes the morphology of the composite material, and some square structures A spheri...

Embodiment 2

[0041] Under the condition of 60ml of water as solvent, 5mmol of manganese chloride tetrahydrate provides manganese source, 15mmol of glucose provides carbon source, and under the condition of 100mmol of urea, it is hydrothermally reacted in a high-pressure reactor lined with polytetrafluoroethylene , Manganese carbonate@carbon composites were obtained by centrifugation, washing and drying. The precursor composite was placed in a porcelain ark and pyrolyzed in a tube furnace. Under air conditions, the temperature is 500°C, the heating rate is 3°C / min, and the temperature is kept for 5 hours to obtain manganese trioxide.

Embodiment 3

[0043] Under the condition of 60ml of water as solvent, 5mmol of manganese chloride tetrahydrate provides manganese source, 15mmol of glucose provides carbon source, and under the condition of 100mmol of urea, it is hydrothermally reacted in a high-pressure reactor lined with polytetrafluoroethylene , Manganese carbonate@carbon composites were obtained by centrifugation, washing and drying. The precursor composite was placed in a porcelain ark and pyrolyzed in a tube furnace. Under the condition of nitrogen protection, the temperature is 500°C, the heating rate is 3°C / min, and the temperature is kept for 5h to obtain manganese monoxide.

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Abstract

The invention provides a preparation method and application of phase controllable manganese oxide. The preparation method comprises the following steps: under the condition that water is used as a solvent, providing a manganese source through manganese chloride tetrahydrate and providing a carbon source through glucose; under the condition that urea exists, putting into a high-pressure reaction kettle taking polytetrafluoroethylene as a lining and carrying out hydrothermal reaction; centrifuging, washing and drying to obtain a manganese carbonate@carbon composite material; carrying out pyrolysis on a precursor material under the same condition, so as to obtain different manganese oxide. The method for synthesizing a precursor is simple, sources are abundant and the price is low; manganeseoxide obtained under different conditions has excellent specific capacitance and good circulating stability.

Description

technical field [0001] The invention relates to the field of supercapacitor electrode materials, in particular to a method for preparing a phase-controllable manganese oxide and its application in supercapacitors. Background technique [0002] With the rapid development of the economy, the demand for energy in the current society is becoming larger and larger. As we all know, on the one hand, the depletion of traditional energy will make human beings' competition for energy more intense, and on the other hand, it will also cause huge pressure on the environment, which forces humans to start looking for new energy sources, such as solar energy, wind energy, tidal energy, and nuclear energy. These new energy sources. In order to make full use of these new energy sources, we need to develop and design a new type of energy storage device with high energy density and high power density to match it. [0003] Among many energy storage systems, supercapacitors have attracted exten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/00C01B32/05C01G45/02H01G11/24H01G11/44H01G11/46
CPCC01B32/05C01G45/00C01G45/02C01P2002/72C01P2004/03C01P2004/04C01P2006/40H01G11/24H01G11/44H01G11/46Y02E60/13
Inventor 朱脉勇阚加瑞申小娟李松军吴述平张侃
Owner JIANGSU UNIV
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