Porous manganic oxide cube as well as preparation method and application thereof

A technology of manganese trioxide and cubes, which is applied in the direction of manganese oxide/manganese hydroxide, etc., can solve the problems of high reaction temperature, unfavorable large-scale application, particle agglomeration, etc., and achieve safe and stable reaction, multi-intercalated lithium/ Effects of delithiation active sites and raw material safety

Inactive Publication Date: 2014-08-13
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the above reports use the hydrothermal method, the temperature required for the reaction is high, the time is long, and the yield is low, and the prepared manganese trioxide is nano-sized, and particles will agglomerate during the charging and discharging process, causing electrode damage. In actual production Not conducive to large-scale application

Method used

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  • Porous manganic oxide cube as well as preparation method and application thereof
  • Porous manganic oxide cube as well as preparation method and application thereof
  • Porous manganic oxide cube as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of synthetic method of porous manganese trioxide cube, comprises the following steps:

[0042] (1) Add 0.003mol potassium permanganate to 50mL ethylene glycol, stir for 30min to obtain a dark yellow liquid, dissolve 0.015mol ammonium bicarbonate in 6mL water, stir for 15min, then add the aqueous solution of ammonium bicarbonate to permanganese In the ethylene glycol solution of potassium acid potassium, stir for 30 minutes to form a uniform and transparent liquid;

[0043] (2) Transfer the mixed solution described in step (1) into a 150mL flask, place it on an oil bath and stir at a speed of 1200r / min, heat up from room temperature to 90°C, and then react at a constant temperature of 90°C for 7h , condensed and refluxed during the reaction, and then cooled naturally to obtain gray-white precipitates of manganese carbonate;

[0044] (3) the manganese carbonate precipitation that step (2) obtains is placed on the centrifuge and washed alternately with water and et...

Embodiment 2

[0049] A kind of synthetic method of porous manganese trioxide cube, comprises the following steps:

[0050] (1) Add 0.003mol potassium permanganate to 35mL ethylene glycol, stir for 30min to obtain a dark yellow liquid, dissolve 0.015mol ammonium bicarbonate in 15mL water, stir for 15min, then add the aqueous ammonium bicarbonate solution to the permanganese In the ethylene glycol solution of potassium acid potassium, stir for 30 minutes to form a uniform and transparent liquid;

[0051] (2) Transfer the mixed solution obtained in step (1) into a 150mL flask, place it on an oil bath and stir at a speed of 1200r / min, heat up from room temperature to 80°C, and then react at a constant temperature of 80°C for 9h, Condensate and reflux during the reaction, and then cool naturally to obtain gray-white precipitates of manganese carbonate;

[0052] (3) the manganese carbonate precipitation that step (2) obtains is placed on the centrifuge and washed alternately with water and ethan...

Embodiment 3

[0057] A kind of synthetic method of porous manganese trioxide cube, comprises the following steps:

[0058] (1) Add 0.003mol potassium permanganate to 35mL ethylene glycol, stir for 30min to obtain a dark yellow liquid, dissolve 0.015mol ammonium bicarbonate in 30mL water, stir for 15min, then add the aqueous solution of ammonium bicarbonate to permanganese In the ethylene glycol solution of potassium acid potassium, stir for 30 minutes to form a uniform and transparent liquid;

[0059] (2) Transfer the mixed solution obtained in step (1) into a 150mL flask, place it on an oil bath and stir at a speed of 1200r / min, heat up from room temperature to 80°C, and then react at a constant temperature of 80°C for 9h, Condensate and reflux during the reaction, and then cool naturally to obtain gray-white precipitates of manganese carbonate;

[0060] (3) the manganese carbonate precipitation that step (2) obtains is placed on the centrifuge and washed alternately with water and ethano...

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Abstract

The invention discloses a porous manganic oxide cube as well as a preparation method and application thereof. The size of the porous manganic oxide cube is 0.4-2 microns, a porous structure comprises macropores and micropores, aperture of each macropore is 25-48nm, and the aperture of each micropore is 5-8nm. The preparation method of the porous manganic oxide cube comprises the following steps: uniformly mixing potassium permanganate, an organic solvent and a carbonate aqueous solution in a certain proportion, carrying out condensation and reflux on the mixed solution for 5-24 hours at the constant temperature of 60-100 DEG C, carrying out reduction reaction on potassium permanganate, so that manganese carbonate grey white precipitate is obtained, placing the manganese carbonate grey white precipitate in an air atmosphere, and calcining for 2-20 hours at the temperature of 520-620 DEG C, so that the porous manganic oxide cube is obtained. The porous manganic oxide cube is prepared by carrying out a constant temperature liquid phase reaction, the related raw materials are common and non-toxic, a technology is simple and practicable, yield is high, and the obtained porous manganic oxide cube has great application value in the field of battery electrodes of lithium ion batteries.

Description

technical field [0001] The invention relates to a porous dimanganese trioxide cube and a preparation method and application thereof, belonging to the technical field of chemical preparation of inorganic materials. Background technique [0002] Dimanganese trioxide has a body-centered cubic structure and is a very important functional metal oxide material. In recent years, it has achieved important applications in photocatalysis, ion exchange, molecular adsorption, biosensing and energy storage. Dimanganese trioxide, as an electrode material for lithium-ion batteries, has the advantages of low price, high specific capacity, good thermal stability and low working voltage, which has attracted widespread attention. [0003] At present, various studies mainly improve the lithium storage performance of manganese trioxide by adjusting its surface properties, internal structure, size and morphology. Structures such as nanowires, nanorods, nanotubes and nanoparticles of manganese tr...

Claims

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Application Information

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IPC IPC(8): C01G45/02
Inventor 李昱黄绍专苏宝连金俊蔡祎
Owner WUHAN UNIV OF TECH
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