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Nanometer ferromanganese oxidation composite electrode materials for super capacitor and preparation method thereof

A technology for supercapacitors, composite electrodes, applied in hybrid capacitor electrodes, nanotechnology for materials and surface science, hybrid/electric double-layer capacitor manufacturing, etc., which can solve electrochemical performance limitations, application limitations, low specific capacity, etc. problem, to achieve the effect of improving electrochemical performance, high specific capacity, and increasing pore volume.

Active Publication Date: 2017-01-04
NINGBO CRRC NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon materials have the advantages of large specific surface area and good chemical stability. They are often used as electrode materials in supercapacitors to form electric double layer capacitors. However, because the stored charge mainly comes from electric double layer capacitors, the specific capacity is low and the electrochemical performance is limited Improvement is severely limited
The application of conductive polymers in supercapacitor electrode materials is also limited due to their structural constraints.

Method used

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  • Nanometer ferromanganese oxidation composite electrode materials for super capacitor and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0023] Dissolve 5g of manganese nitrate and 4.15g of ferric nitrate in deionized water, then add 2g of citric acid to form a uniformly dispersed solution, then add an appropriate amount of ammonia water to adjust the pH of the solution to neutral, and then heat at 120°C for 2.5 hours to make the solution gradually Turned into a viscous gel and eventually into lumps. After drying at 180° C. for 5 hours, it was placed in a tube furnace and calcined at 500° C. for 2 hours to obtain a nano-ferromanganese oxide composite electrode material. Such as figure 1 As shown, the nano-ferromanganese oxide composite electrode material has a pure phase cubic crystal structure, and its specific surface area is 23.15m 2 / g, the pore volume is 0.00971cm 3 / g.

[0024] The prepared composite electrode material, binder PVDF, and conductive agent acetylene black were uniformly mixed according to a mass ratio of 8:1:1, and then a positive electrode was made. In the same way, activated carbon is ...

Embodiment 2

[0026] Dissolve 5g of manganese nitrate and 5g of ferric nitrate in deionized water, then add 2g of citric acid to form a uniformly dispersed solution, then add an appropriate amount of ammonia water to adjust the pH of the solution to neutral, then heat at 120°C for 2.5 hours to make the solution gradually become Into a viscous gel, and finally into a block. After drying at 180° C. for 5 hours, it was placed in a tube furnace and calcined at 500° C. for 2 hours to obtain a nano-ferromanganese oxide composite electrode material. The specific surface area of ​​the nano-manganese iron oxide composite electrode material is 23.22m 2 / g, the pore volume is 0.00975cm 3 / g.

[0027] The prepared composite electrode material, binder PVDF, and conductive agent acetylene black were uniformly mixed according to a mass ratio of 8:1:1, and then a positive electrode was made. In the same way, activated carbon is used as the negative electrode active material, the binder PVDF, and the con...

Embodiment 3

[0029] Dissolve 5g of manganese nitrate and 6g of ferric nitrate in deionized water, then add 2g of citric acid to form a uniformly dispersed solution, then add an appropriate amount of ammonia water to adjust the pH of the solution to neutrality, and then heat at 120°C for 2.5 hours to make the solution gradually become Into a viscous gel, and finally into a block. After drying at 180° C. for 5 hours, it was placed in a tube furnace and calcined at 500° C. for 2 hours to obtain a nano-ferromanganese oxide composite electrode material. The specific surface area of ​​nano-manganese iron oxide composite electrode material is 23.09m 2 / g, the pore volume is 0.00962cm 3 / g.

[0030] The prepared composite electrode material, binder PVDF, and conductive agent acetylene black were uniformly mixed according to a mass ratio of 8:1:1, and then a positive electrode was made. In the same way, activated carbon is used as the negative electrode active material, the binder PVDF, and the ...

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Abstract

The present invention relates to nanometer ferromanganese oxidation composite electrode materials for a super capacitor and a preparation method thereof. The materials are made through combination of the manganese oxide and the ferric oxide through a solvothermal method, wherein the mass percent of the manganese oxide is 40-60%. The concrete preparation steps comprise: dissolving the manganese source and the iron source in the deionized water, adding the organic acid to form dispersed and uniform solution, adjusting the pH to be neutral, heating the solution to allow the solution to gradually change to the viscous gel, continuing heating the gel until becoming a block, and after drying, obtaining the nanometer ferromanganese oxidation composite electrode materials through calcination. The nanometer ferromanganese oxidation composite electrode materials are good in cycle stability and high in specific capacity, and are used in a super capacitor device to greatly improve the whole electrochemical performance.

Description

technical field [0001] The invention relates to an electrode material for an energy storage device, in particular to a nanometer ferromanganese oxide composite electrode material for a supercapacitor and a preparation method thereof. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, are new energy storage devices between traditional capacitors and batteries. Compared with traditional capacitors, supercapacitors have higher specific capacitance and specific energy, and a wider operating temperature range; compared with batteries, they have higher specific power and extremely long cycle life, and have the advantages of short charging time, charging High efficiency, no memory effect, basically no maintenance and no pollution to the environment. Supercapacitors have broad application prospects in the communication market, new energy vehicles, consumer electronics, military equipment and other fields. However, its low energy density has al...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/46H01G11/86B82Y30/00
CPCB82Y30/00H01G11/24H01G11/46H01G11/86Y02E60/13
Inventor 阮殿波周洲袁峻李林艳陈雪丹
Owner NINGBO CRRC NEW ENERGY TECH CO LTD
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