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Application of high-performance supercapacitor electrode material Co-Fe-type Prussian blue nanocube

A supercapacitor electrode, Prussian blue-like technology, applied in hybrid capacitor electrodes, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problem of less research, unsatisfactory rate performance, low specific capacity and rate performance and other problems, to achieve the effect of simple process, improved fast charge and discharge and service life, and increased capacity

Inactive Publication Date: 2018-05-29
DALIAN NATIONALITIES UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of Prussian blue-like compounds as cathode materials for supercapacitors has been less studied
Chen Jie et al [1] obtained Prussian blue derivatives through a simple chemical co-precipitation method and applied them to supercapacitor materials. When the current is 0.2A / g, Ni 2 [Fe(CN) 6 ] has a high specific capacity of 450F / g, but its rate performance is not ideal
co 2 [Fe(CN) 6 ] have also been synthesized, but their specific capacity and rate performance are much lower than that of Ni 2 [Fe(CN) 6 ]

Method used

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  • Application of high-performance supercapacitor electrode material Co-Fe-type Prussian blue nanocube
  • Application of high-performance supercapacitor electrode material Co-Fe-type Prussian blue nanocube
  • Application of high-performance supercapacitor electrode material Co-Fe-type Prussian blue nanocube

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Weigh 0.143g cobalt chloride hexahydrate (0.6mmol) and 0.294g trisodium citrate (1mmol) to dissolve in 20mL deionized water to prepare a cobalt chloride solution, then weigh 0.132g potassium ferricyanide (0.4mmol) to dissolve Prepare a potassium ferricyanide solution in 20 mL of deionized water; slowly add the potassium ferricyanide solution dropwise into the cobalt chloride solution under stirring; leave it to age at room temperature for 24 hours, collect the sample by centrifugation, and wash with deionized water 3 times, tumble dry at 60°. From figure 1 , 2 Co-Fe-like Prussian blue nanocubes with a size of about 250nm can be seen.

[0030] The comparative example of embodiment 1 (without trisodium citrate)

[0031] Weigh 0.143g cobalt chloride hexahydrate (0.6mmol) and dissolve it in 20mL deionized water to prepare cobalt chloride solution, then weigh 0.132g potassium ferricyanide (0.4mmol) and dissolve it in 20mL deionized water to prepare ferricyanide Potassium...

Embodiment 2

[0034] Weigh 0.143g cobalt chloride hexahydrate (0.6mmol) and 0.294g trisodium citrate (1mmol) and dissolve in 20mL deionized water to prepare an inorganic cobalt salt solution, then weigh 0.132g potassium ferricyanide (0.8mmol) to dissolve Prepare a potassium ferricyanide solution in 20 mL of deionized water; slowly add the potassium ferricyanide solution dropwise into the inorganic cobalt salt solution under stirring; leave it to age for 24 hours at room temperature, collect the sample by centrifugation, and wash with deionized water 3 times, tumble dry at 60°. From Figure 5 Co-Fe-like Prussian blue nanocubes with a size of about 300 nm can be seen.

[0035] Application example of embodiment 2

[0036] The Co-Fe-like Prussian blue nano-cubic electrode was prepared according to the method described in the application example of Example 2 and its performance was tested. From Figure 6 , it can be measured that the capacitance value of the Co-Fe Prussian blue nano-cubic ele...

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Abstract

The invention relates to application of a high-performance supercapacitor electrode material Co-Fe-type Prussian blue nanocube, and belongs to the technical field of electrode material preparation. With inorganic cobalt salt and potassium ferricyanide as reaction raw materials and trisodium citrate as a complex stabilizer, by adopting a liquid-phase co-precipitation reaction method and controllingreaction conditions such as the dosage of potassium ferricyanide and the standing and aging time, the Co-Fe-type Prussian blue nanocube material with high dispersibility and a large specific surfacearea is prepared, and the size of the material is about 300 nm. By means of the prepared Co-Fe-type Prussian blue nanocube material, the capacity of electrochemical capacitors is increased, the rapidcharge and discharge performance and other performance of the capacitors are improved, the service life of the capacitors is prolonged, the capacitance value is up to 447 F / g when constant-current charge and discharge with the current of 5 A / g are achieved in a 1 mol / L sodium sulfate solution, and the material has good rate performance.

Description

[0001] This application is a divisional application with the application number 2017105689300, the application date is July 13, 2017, and the invention title is "a high-performance supercapacitor electrode material Co-Fe-like Prussian blue nanocube and its preparation method and application". technical field [0002] The invention relates to a high-performance supercapacitor electrode material Co-Fe-like Prussian blue nano-cube and a preparation method and application thereof, belonging to the technical field of electrode material preparation. Background technique [0003] Prussian blue is a dark blue pigment, mainly used in paint, ink, plastics and other industries as well as the coloring of cultural and educational supplies. Since in the Prussian blue unit cell, ferrous ions and ferric ions occupy two different positions, and these two positions can be replaced by different other transition metals, so the types of Prussian blue-like compounds formed are diverse. sex. Prus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C3/12H01G11/24H01G11/30H01G11/86B82Y30/00
CPCY02E60/13C01C3/12B82Y30/00C01P2002/72C01P2004/03C01P2004/38C01P2004/51C01P2004/62C01P2004/82C01P2006/40H01G11/24H01G11/30H01G11/86
Inventor 宋朝霞刘伟孙囡翾魏文硕周泉
Owner DALIAN NATIONALITIES UNIVERSITY
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