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Synthesis method and use of monodispersed KMn8O16 nanospheres

A synthesis method, nanosphere technology, applied in the direction of nanotechnology, nanotechnology, manganese oxide/manganese hydroxide, etc., can solve the problems of unfavorable large-scale application, high temperature required for reaction, long time, etc., and achieve outstanding thermal stability , Safe and stable reaction, high repeatability effect

Inactive Publication Date: 2014-11-05
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there have been reports on the preparation of potassium manganese oxide and its application in the research of lithium-ion battery electrode materials in recent years, most of the above reports use the hydrothermal method, and potassium permanganate is used as the oxidizing agent and divalent manganese as the reducing agent in the reaction process. , the temperature required for the reaction is high, the time is long, and the yield is very low, which is not conducive to large-scale application in actual production

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  • Synthesis method and use of monodispersed KMn8O16 nanospheres
  • Synthesis method and use of monodispersed KMn8O16 nanospheres
  • Synthesis method and use of monodispersed KMn8O16 nanospheres

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Effect test

Embodiment 1

[0037] A kind of monodisperse potassium manganese oxide KMn 8 o 16 The synthetic method of nanosphere, comprises the following steps:

[0038] (1) Weigh 0.003mol (0.474g) of potassium permanganate, 0.015mol (1.185g) of ammonium bicarbonate and 0.1g of polyvinylpyrrolidone (K29) into 35mL of deionized water and stir for 30min to obtain a uniform purple transparent solution;

[0039] (2) Add 70ml of isopropanol to the purple transparent solution prepared in step (1), stir for 15min to form a uniform mixed solution;

[0040] (3) Transfer the homogeneously mixed solution obtained in step (2) into a 500mL beaker, cover the beaker with plastic wrap (there is a gap between the plastic wrap and the mouth of the beaker), and stir on an oil bath (rotating speed is 1200r / min ), heated up from room temperature to 80°C, then reacted at a constant temperature of 80°C for 5h, and then cooled naturally to obtain a brown-black precipitate;

[0041] (4) Place the obtained brown-black precipi...

Embodiment 2

[0046] A kind of monodisperse potassium manganese oxide KMn 8 o 16 The synthetic method of nanosphere, comprises the following steps:

[0047] (1) Weigh 0.003mol (0.474g) of potassium permanganate, 0.015mol (1.185g) of ammonium bicarbonate and 0.1g of polyvinylpyrrolidone (K29) into 50mL of deionized water and stir for 30min to obtain a uniform purple transparent solution ;

[0048] (2) Add 70ml of isopropanol to the purple transparent solution prepared in step (1), and stir for 15 minutes to form a uniform mixed solution.

[0049] (3) Transfer the homogeneously mixed solution obtained in step (2) into a 500mL beaker, cover the beaker with plastic wrap (there is a gap between the plastic wrap and the mouth of the beaker), and stir on an oil bath (rotating speed is 1200r / min ), heated up from room temperature to 80°C, then reacted at a constant temperature of 80°C for 5h, and then cooled naturally to obtain a brown-black precipitate;

[0050] (4) Place the obtained brown-bl...

Embodiment 3

[0055] A kind of monodisperse potassium manganese oxide KMn 8 o 16 The synthetic method of nanosphere, comprises the following steps:

[0056] (1) Weigh 0.003mol (0.474g) potassium permanganate, 0.015mol (1.185g) ammonium bicarbonate and 0.1g polyvinylpyrrolidone (K32) into 35mL deionized water, stir for 30min to obtain a uniform purple transparent solution ;

[0057] (2) Add 70ml of isopropanol to the purple transparent solution prepared in step (1), and stir for 15 minutes to form a uniform mixed solution.

[0058] (3) Transfer the homogeneously mixed solution obtained in step (2) into a 500mL beaker, cover the beaker with plastic wrap (there is a gap between the plastic wrap and the mouth of the beaker), and stir on an oil bath (rotating speed is 1200r / min ), heated from room temperature to 60°C, then reacted at a constant temperature of 60°C for 5h, and then cooled naturally to obtain a brownish-black precipitate;

[0059] (4) Place the obtained brown-black precipitate...

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Abstract

The invention discloses a synthesis method and a use of monodispersed KMn8O16 nanospheres. The synthesis method of the monodispersed KMn8O16 nanospheres comprises the following steps of dissolving potassium permanganate, polyvinylpyrrolidone and carbonate in deionized water, adding soluble organic alcohol into the solution, carrying out mixing to obtain a uniform mixture, putting the mixture into a thermostatic bath, carrying out a thermostatic reaction process at a temperature of 50-120 DEG C for 1-24h to obtain brownish black precipitates, drying the brownish black precipitates, and calcining the dried brownish black precipitates in an argon atmosphere at a temperature of 300-600 DEG C for 2-20h to obtain the monodispersed KMn8O16 nanospheres. The monodispersed KMn8O16 nanospheres have structured morphology and uniform size adjustable in a range of 80-200nm. The monodispersed KMn8O16 nanospheres are prepared by a constant-temperature liquid phase reaction. The synthesis method is easy and simple and has a large yield. A performance test shows that the monodispersed KMn8O16 nanospheres have a large application prospect in the lithium ion battery energy storage field.

Description

technical field [0001] The present invention relates to a kind of monodisperse potassium manganese oxide KMn 8 o 16 The synthesis method and application of the nanosphere belong to the technical field of chemical preparation of inorganic materials. Background technique [0002] Potassium manganese oxide (KMn 8 o 16 ) belongs to the tetragonal phase structure and is a potassium manganese ore type manganese oxide, which has a mixed manganese valence state and a tunnel structure. In recent years, potassium manganese oxide has been widely used in catalysis, photocatalysis, gas sensing, drug release, and energy storage, especially in energy storage, which has received more and more attention. Due to the easy synthesis of potassium manganese oxygen, high thermal stability, and tunneling effect, some people have begun to test it as a positive electrode material for lithium-ion batteries, but there have been no reports of using it as a negative electrode for batteries. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02H01M4/505H01M4/1391B82Y40/00B82Y30/00
CPCY02E60/10
Inventor 李昱黄绍专蔡祎金俊张倩王洪恩苏宝连阳晓宇陈丽华邓兆
Owner WUHAN UNIV OF TECH
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