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Device and method for preparing manganese dioxide ultrafine powder

An ultra-fine powder, manganese dioxide technology, used in manganese oxide/manganese hydroxide, hybrid capacitor electrodes, etc., can solve the problems of poor mixing effect of reactants, large particle size of manganese dioxide, poor product performance, etc.

Inactive Publication Date: 2013-01-16
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the traditional reactor, the mixing effect of the reactants is not good, resulting in large particle size, wide particle size distribution, serious particle agglomeration and poor product performance of the manganese dioxide prepared by the precipitation method

Method used

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  • Device and method for preparing manganese dioxide ultrafine powder
  • Device and method for preparing manganese dioxide ultrafine powder
  • Device and method for preparing manganese dioxide ultrafine powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Weigh 15.8 g of analytical grade KMnO 4 Uniformly dispersed in 1 L of deionized water to prepare solution A with a concentration of 0.1 mol / L; 0.1 g of triblock copolymer (P123, polyethylene oxide-polypropylene oxide-polyethylene oxide triblock segment copolymer) was uniformly dispersed in 20 mL of ethanol, and then this solution was added to a solution containing 25.35 g of analytically pure MnSO 4 solution, continuously stirred for 48 h, and the uniformly mixed solution was prepared into 0.1 g / L P123 concentration of 0.15 mol / L MnSO 4 The reaction solution B; inject the prepared solution into the storage tanks A and B.

[0026] (2) In this experiment, the outlet pipe of the capillary impinging flow reactor was filled with three-dimensional mesh packing. Turn on the power supply of the two constant-current pumps, turn on the stirring paddle and the ultrasonic equipment, set the flow rate of the two pumps to 300 mL / min, and turn on the two pumps at the same time t...

Embodiment 2

[0030] (1) Weigh 15.8 g of analytical grade KMnO 4 Disperse evenly in deionized water to prepare a solution A with a concentration of 0.1 mol / L; accurately weigh 25.35 g of analytically pure grade MnSO 4 Dissolve in deionized water to prepare 0.15 mol / L solution B; inject the prepared solution into storage tanks A and B.

[0031] (2) In this experiment, no three-dimensional mesh structure was adopted in the capillary impact outflow outlet pipe. Set the flow rate of the two pumps to 300 mL / min, and turn on the two pumps at the same time through computer control, so that the pumps are filled with the reaction solution.

[0032] (3) Set the feed time to 16 s, and start the advection pump at the same time again, and the liquid enters the ultrasonic reactor after a strong impact, and the subsequent reaction is carried out for 30 min.

[0033] (4) The reaction product was washed, filtered under reduced pressure, and dried at 80°C for 12 h. The dried product was fully ground and st...

Embodiment 3

[0035] (1) 0.158 g of analytical grade KMnO 4 Disperse evenly in deionized water to prepare a solution A with a concentration of 0.001 mol / L; accurately weigh 0.2535 g of analytically pure grade MnSO 4 Dissolve in deionized water to prepare 0.0015 mol / L solution B; inject the prepared solution into storage tanks A and B.

[0036] (2) In this experiment, the three-dimensional mesh structure was not used in the capillary impingement outlet pipe, and the flow rate of the two pumps was set at 80 mL / min. Through software control, the two pumps were turned on at the same time to fill the pumps with the reaction solution.

[0037] (3) Set the feeding time to 1 min, and start the advection pump at the same time again, and the liquid enters the ultrasonic reactor after a strong impact, and the subsequent reaction is carried out for 30 min.

[0038](4) After washing and suction filtration, the reaction product was dried at 80°C for 12 h, and the dried product was fully ground and store...

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Abstract

The invention discloses a device and method for preparing manganese dioxide ultrafine powder. The device comprises at least two liquid storage tanks for storing reaction liquids and two tranquil flow pumps respectively connected with the liquid storage tanks. The device is characterized in that the two tranquil flow pumps are respectively connected with inlets at both ends of a capillary impinging stream reactor through reducer unions; a guide tube is arranged at an outlet of the capillary impinging stream reactor; an outlet of the guide tube is positioned above a receiver; an electric stirrer is arranged in the receiver; and the receiver is positioned in an ultrasonic instrument. By using the device and method, a supercapacitor material which has regular morphology, fine particles, narrow particle size distribution and better capacitive performance can be obtained.

Description

technical field [0001] The energy material preparation technology of the present invention, the application of its products can be attributed to material science and engineering, more specifically, it relates to a device and method for preparing manganese dioxide ultrafine powder. Background technique [0002] The combination of supercapacitors and batteries has been recognized as the best power system for electric vehicles, so all countries attach great importance to the research and development of supercapacitors. In our country, it is also very necessary to vigorously carry out research on supercapacitors, and investing in in-depth basic theoretical research and practical application research has great social benefits and practical significance. As a supercapacitor material, manganese dioxide has become the focus of supercapacitor materials because of its fast charge and discharge speed, long cycle life, and environmental friendliness. Manganese dioxide can be prepared b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02H01G11/30
CPCY02E60/13
Inventor 文利雄刘志伟陈建峰
Owner BEIJING UNIV OF CHEM TECH
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