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Preparation method, preparation product and application of Mn7O13.5H2Oalpha-Fe2O3 composite

A mn7o13·5h2o, composite material technology, applied in nanotechnology for materials and surface science, hybrid/electric double layer capacitor manufacturing, hybrid capacitor electrodes, etc., which can solve complex operations, high energy consumption, time-consuming and laborious, etc. problem, to achieve the effect of simple operation, improving energy storage properties, saving time and energy and energy consumption

Active Publication Date: 2019-10-29
NORTHWEST UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few studies on the supercapacitor performance of the hydrated manganese oxide, and the preparation of Mn 7 o 13 ·5H 2 The method of O uses the electrochemical deposition method, which has the disadvantages of time-consuming and labor-intensive, high energy consumption and complicated operation.

Method used

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  • Preparation method, preparation product and application of Mn7O13.5H2Oalpha-Fe2O3 composite
  • Preparation method, preparation product and application of Mn7O13.5H2Oalpha-Fe2O3 composite
  • Preparation method, preparation product and application of Mn7O13.5H2Oalpha-Fe2O3 composite

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Experimental program
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Embodiment 1

[0060] mn 7 o 13 ·5H 2 O / quasi-hexagonal α-Fe 2 o 3 Preparation of nanosheet composites

[0061] (1) Quasi-hexagonal α-Fe 2 o 3 Preparation of nanosheets

[0062] Weigh 20mmol of ferric nitrate (9 crystalline water) and place it in a round bottom flask, add 40ml of absolute ethanol and 5ml of deionized water, stir mechanically for 1h, then add 2.8g of sodium acetate, stir for 0.5h; pour the above mixed liquid into In a 50ml polytetrafluoroethylene-lined reactor, react at 180°C for 8h; after cooling, centrifuge, wash repeatedly with deionized water and absolute ethanol, and dry in a blast oven at 60°C for 12h to obtain α-Fe 2 o 3 Nanosheets;

[0063] (2) Quasi-hexagonal α-Fe 2 o 3 Crystallization of nanosheets

[0064] 0.2g quasi-hexagonal α-Fe2 o 3 Mix the nanosheets with 10g of analytically pure NaCl, grind them evenly in an agate mortar, put the evenly ground mixture into a ceramic crucible, and put it in a tube furnace for N 2 Calcination and crystallization u...

Embodiment 2

[0088] mn 7 o 13 ·5H 2 O / quasi-hexagonal α-Fe 2 o 3 Preparation of nanosheet composites

[0089] (1) Quasi-hexagonal α-Fe 2 o 3 Preparation of nanosheets

[0090] Weigh 20mmol ferric chloride into a round bottom flask, add 40ml absolute ethanol and 5ml deionized water, stir mechanically for 1h, then add 2.8g potassium acetate, stir for 0.5h; pour the above mixed liquid into 50ml polytetrafluoroethylene In a lined reactor, react at 180°C for 8h. After cooling, centrifuge, wash repeatedly with deionized water and absolute ethanol, and dry in a blast drying oven at 60°C for 12 hours;

[0091] (2) Quasi-hexagonal α-Fe 2 o 3 Crystallization of nanosheets

[0092] 0.2g quasi-hexagonal α-Fe 2 o 3 Nanosheets with 10 g of analytically pure Na 2 CO 3 Mix and grind thoroughly in an agate mortar, put the evenly ground mixture into a ceramic crucible, and calcine and crystallize it in a tube furnace under the protection of Ar gas. The heating conditions are as follows: heat...

Embodiment 3

[0097] mn 7 o 13 ·5H 2 O / quasi-hexagonal α-Fe 2 o 3 Preparation of nanosheet composites

[0098] (1) Quasi-hexagonal α-Fe 2 o 3 Preparation of nanosheets

[0099] Weigh 20mmol of ferric sulfate and put it in a round bottom flask, add 40ml of absolute ethanol and 5ml of deionized water, stir mechanically for 1h, then add 2.8g of sodium acetate, stir for 0.5h; pour the above mixed liquid into 50ml of polytetrafluoroethylene In a lined reactor, react at 180°C for 8h. After cooling, centrifuge, wash repeatedly with deionized water and absolute ethanol, and dry in a blast drying oven at 60°C for 12 hours;

[0100] (2) Quasi-hexagonal α-Fe 2 o 3 Crystallization of nanosheets

[0101] 0.2g quasi-hexagonal α-Fe 2 o 3 The nanosheets were mixed with 10 g of analytically pure KCl, and ground thoroughly and evenly in an agate mortar, and the evenly ground mixture was put into a ceramic crucible, and calcined and crystallized in a tube furnace under the protection of Ar gas. ...

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Abstract

The invention discloses a preparation method of a Mn7O13.5H2O / alpha-Fe2O3 composite, and relates to the technical fields of material preparation and application of capacitor electrode materials. The method provided by the invention comprises the steps that (1) a hexagonal alpha-Fe2O3 nanosheet is prepared; (2) the hexagonal alpha-Fe2O3 nanosheet is crystallized; (3) a Mn7O13.5H2O / alpha-Fe2O3 nanosheet composite is prepared. The invention further provides the Mn7O13.5H2O / alpha-Fe2O3 composite prepared by the preparation method and the application of the composite in a supercapacitor electrode.According to the invention, the Mn7O13.5H2O / alpha-Fe2O3 composite has good capacitance characteristics, exhibits excellent electrochemical performance under a three-electrode system, and can be widelyapplied to supercapacitor electrode materials.

Description

technical field [0001] The invention relates to the technical field of material preparation and application of supercapacitor electrode materials, in particular to a Mn 7 o 13 ·5H 2 Oα-Fe 2 o 3 Preparation methods, preparation products and applications of composite materials. Background technique [0002] With the rapid development of society and economy today, human beings demand more and more energy. The limited fossil energy reserves on the earth and their unrestrained exploitation and use have caused human beings to face two very serious problems: the energy crisis and the environment. pollute. The development of new clean energy such as water energy, wind energy, nuclear energy, etc. is a sustainable method to effectively solve the energy crisis and environmental pollution. [0003] These new energy sources are usually stored by converting them into electrical energy before they can be utilized by humans. As a type of energy storage device, supercapacitors are wi...

Claims

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Application Information

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IPC IPC(8): H01G11/46H01G11/24H01G11/86B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/24H01G11/46H01G11/86Y02E60/13
Inventor 孟淑娟苏琼张平孙万虹王彦斌
Owner NORTHWEST UNIVERSITY FOR NATIONALITIES
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