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Nanometer manganous manganic oxide/active carbon composite material and preparation method therefor

A technology of manganese tetroxide and composite materials, which is applied in the field of electrochemistry, can solve the problems of in-depth research on manganese tetroxide/activated carbon composite materials, etc., and achieve good cycle stability, increase specific surface area, and improve electrochemical performance. Effect

Inactive Publication Date: 2016-11-16
YUNNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as a member of the carbon material family, although activated carbon also has the advantages of a wide range of sources, low cost, and a rich pore structure that is conducive to the transport of protons and electrons, in-depth research on manganese tetraoxide / activated carbon composites has not yet been completed. carry out

Method used

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  • Nanometer manganous manganic oxide/active carbon composite material and preparation method therefor
  • Nanometer manganous manganic oxide/active carbon composite material and preparation method therefor
  • Nanometer manganous manganic oxide/active carbon composite material and preparation method therefor

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preparation example Construction

[0056] The preparation method of nano trimanganese tetraoxide / activated carbon composite material of the present invention, comprises the following steps:

[0057] 1) Activation treatment of activated carbon:

[0058] A. According to the mass ratio of activated carbon:KOH=1:3~5, weigh activated carbon and KOH particles respectively and place them in an agate mortar, grind and mix evenly;

[0059] B. Put the evenly ground mixture in a corundum porcelain boat, then place the corundum porcelain boat in an inert gas atmosphere furnace, raise the temperature to 700~850°C, and the heating rate is 5~10°C / min, and then heat it up at 800°C Activation treatment 8 ~ 12h;

[0060] C. Take out the porcelain boat, cool it to room temperature under natural conditions, and then wash it centrifugally with 0.8~1.0 mol / L dilute hydrochloric acid solution and deionized water until the pH of the cleaning solution is neutral;

[0061] D. Dry the precipitate washed by centrifugation in a constant ...

Embodiment 1

[0074] 1) Activation treatment of coconut shell activated carbon:

[0075] A. According to the mass ratio of coconut shell activated carbon: KOH=1:4, weigh the coconut shell activated carbon and KOH particles respectively and place them in an agate mortar, grind and mix them evenly;

[0076] B. Put the evenly ground mixture in a corundum porcelain boat, then place the corundum porcelain boat in an argon atmosphere furnace, raise the temperature to 800°C with a heating rate of 5°C / min, and then activate it at 800°C for 8 h ;

[0077] C. Take out the porcelain boat, cool it to room temperature under natural conditions, and then wash it centrifugally with 1 mol / L dilute hydrochloric acid solution and deionized water until the pH of the cleaning solution is neutral;

[0078] D. Dry the precipitate washed by centrifugation in a constant temperature drying oven at 60°C to obtain activated coconut shell activated carbon;

[0079] 2) Preparation of nano-manganese tetraoxide / activate...

Embodiment 2

[0097] 1) Activation treatment of activated carbon:

[0098] A. According to the mass ratio of activated carbon:KOH=1:3, weigh activated carbon and KOH particles respectively and place them in an agate mortar, grind and mix evenly;

[0099] B. Put the uniformly ground mixture in a corundum porcelain boat, then place the corundum porcelain boat in an inert gas atmosphere furnace, raise the temperature to 700°C with a heating rate of 5°C / min, and then activate it at 800°C for 8 h ;

[0100] C. Take out the porcelain boat, cool it to room temperature under natural conditions, and then wash it centrifugally with 0.8 mol / L dilute hydrochloric acid solution and deionized water until the pH of the cleaning solution is neutral;

[0101] D. Dry the precipitate washed by centrifugation in a constant temperature drying oven at 50°C to obtain activated activated carbon;

[0102] 2) Nano Mn 3 o 4 / AC composite preparation:

[0103] A, according to gac 5wt%, the mass percentage of trim...

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Abstract

The invention discloses a nanometer manganous manganic oxide / active carbon composite material and a preparation method therefor. The composite material comprises the following raw materials in percentage by mass: 85-95wt% of manganous manganic oxide and 5-15wt% of coconut shell active carbon. According to the preparation method, the natural coconut shell active carbon is subjected to KOH activation processing in advance initially; the nanometer Mn<3>O<4> / AC composite material with a hierarchical-porous structure is prepared by adopting a simple and convenient hydrothermal method and a subsequent thermal treatment process; the method is simple; the preparation efficiency is high; the active carbon with excellent electric conductivity is combined with the manganous manganic oxide, so that the electric conductivity of the single manganous manganic oxide is greatly improved; and therefore, the electrochemical property of the composite material is greatly improved.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a nanometer trimanganese tetraoxide / activated carbon composite material and a preparation method thereof. Background technique [0002] Trimanganese tetroxide is a black square crystal, also known as manganese pyroxene, black manganese ore, and active manganese oxide. In addition to the common characteristics of manganese oxides such as extensive resources, low price, and excellent electromagnetic properties, it also has manganese dioxide and trimanganese. Some individual characteristics that manganese oxide does not have: such as the spinel crystal structure of trimanganese tetraoxide has excellent high temperature stability and trimanganese tetraoxide compound has two coexisting manganese ion valence states (Mn(III) and Mn(II)). The coexistence of two manganese ion valence states in trimanganese tetraoxide makes trimanganese tetraoxide more conducive to redox reacti...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/34H01G11/46H01G11/86
CPCY02E60/13H01G11/24H01G11/34H01G11/46H01G11/86
Inventor 王毓德肖雪春王燕
Owner YUNNAN UNIV
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