MnO2-RuO2 composite material, preparation method and application thereof

A composite material, the technology of ruthenium dioxide, applied in the directions of manganese oxide/manganese hydroxide, chemical instruments and methods, ruthenium/rhodium/palladium/osmium/iridium/platinum compounds, etc., can solve the complex preparation process, poor conductivity, problems such as poor stability, to achieve the effects of good dispersion, high specific capacity, and easy industrialization

Active Publication Date: 2015-10-14
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of existing electrode materials in the manufacture of supercapacitors and provide a novel electrode material: carbon dioxide A ruthenium dioxide composite material, and a method for preparing the composite material, to overcome the defects of low specific capacity, poor stability, poor dispersibility, poor conductivity, and complicated preparation process in the preparation of manganese dioxide electrode materials by current chemical methods. Exploring the use of this composite material to make supercapacitors

Method used

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  • MnO2-RuO2 composite material, preparation method and application thereof
  • MnO2-RuO2 composite material, preparation method and application thereof
  • MnO2-RuO2 composite material, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Prepare 0.1mol / L manganese chloride (MnCl 2 ) and ruthenium chloride (RuCl 3 ) aqueous solution of 200ml each; take 20ml of manganese chloride and ruthenium chloride aqueous solution, mix and stir for 5 minutes; add dropwise to the above solution until the pH value is 9; centrifuge filter, wash 3 times with water; dry at 80°C to obtain Ruthenium dioxide composite powder. The specific surface area of ​​the composite was determined by nitrogen adsorption-desorption to be 135m 2 / g.

[0051] Oxygenate Ruthenium dioxide composite material powder and polyvinylidene fluoride (PVDF) N-methylpyrrolidone (NMP) solution (PVDF concentration: 25mg / ml) were evenly mixed to obtain a viscous slurry, which was coated on graphite paper as a working electrode; During chemical testing, platinum wire is used as the counter electrode, silver / silver chloride is used as the reference electrode, and 1mol / L Na 2 SO 4 The aqueous solution is electrolyte; the test instrument is Shanghai C...

Embodiment 2

[0061] Prepare 1mol / L respectively, 0.8mol / L, each 200ml of 0.4mol / L manganese chloride, prepare 20ml of 0.1mol / L ruthenium chloride aqueous solution; An amorphous manganese oxide-ruthenium dioxide composite material.

[0062] The above-mentioned amorphous manganese oxide-ruthenium dioxide composite materials with ratios of manganese and ruthenium of 4:1, 8:1, and 10:1 have the highest specific capacitances of 289F / g and 263F / g respectively at a scan rate of 2mV / s. , 224F / g.

[0063] Example 2 is to adjust the concentration of manganese chloride so that the molar ratio of ruthenium chloride and manganese chloride is changed within the range of 1: (4-10). The measured specific capacitance is lower than the 1:1 molar ratio of CO2 - specific capacitance value of ruthenium dioxide. This is due to the poor conductivity of manganese oxide, increasing the amount of manganese oxide leads to the weakening of charge transport, which reduces the specific capacitance of the composite ...

Embodiment 3

[0065] Using filter paper as a diaphragm and 1mol / L NaSO4 as an electrolyte, two electrode sheets obtained in Example 1 were placed on the front and back sides of the diaphragm to obtain a symmetrical supercapacitor (symmetrical cell). Active material area 1×1cm 2 .

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Abstract

The invention relates to a MnO2-RuO2 composite material, a preparation method of the composite material and an application of the composite material in the field of super capacitors. The MnO2-RuO2 composite material is in an amorphous phase and is in the form of porous particles with particle size being 10-50 nm. The MnO2-RuO2 composite material is generated with a manganese salt and a ruthenium salt as raw materials in an in-situ co-precipitation manner. In a 1 mol/L Na2SO4 water solution electrolyte, when a scanning rate is 2mV/s, the specific capacitance of the composite material can reach 347 F/g. The molar ratio of ruthenium to manganese in the composite material is 1:(1-10).

Description

technical field [0001] The present invention relates to a manganese dioxide-ruthenium dioxide composite material, a preparation method of the composite material and the utilization of the composite material, in particular to an amorphous manganese dioxide-ruthenium dioxide composite material, co-precipitated by a precursor solution Preparation of the composite material and the application of the composite material in the field of supercapacitors. Background technique [0002] Supercapacitors have the advantages of high power density, fast response time, long life, and simple maintenance. They can be widely used in the fields of information, electronics, energy, environment, transportation, and military industry. Electrochemical capacitor electrode materials with excellent instantaneous charge and discharge performance and good cycle performance are imminent. [0003] According to the electrode materials used, supercapacitors can be divided into the following two categories:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02C01G55/00H01G11/46
Inventor 黄富强支键尹浩
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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