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Combined electrode for super capacitor and preparation method thereof

A technology of supercapacitors and composite electrodes, which is applied in the manufacture of hybrid capacitor electrodes, capacitors, and hybrid/electric double-layer capacitors, etc. Improved, high theoretical specific capacitance, high mechanical strength effect

Inactive Publication Date: 2012-09-19
昆山昆鹏利杰高分子材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]Currently commercialized supercapacitors are mainly electric double layer capacitors with carbon materials as electrode materials, but generally carbon materials have low specific capacity, which is difficult to meet the future high energy density practical needs
Chinese patent CN101661840A discloses a method for preparing carbon nanotube electrodes for supercapacitors, which uses chemical vapor deposition to directly grow carbon nanotubes (CNTs) on foamed nickel substrates, although no bonding is used in the electrode preparation process. agent, which reduces the contact resistance of the carbon nanotube electrode, but the carbon nanotube electrode still has the inherent defect of low carbon material specific capacity (13-24 F / g)
Although no binder is used in the electrode preparation process, due to the use of planar quartz as the substrate, there are problems such as large electrode resistance (115 Ω), poor power performance, and less increase in the specific surface area of ​​manganese dioxide.

Method used

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  • Combined electrode for super capacitor and preparation method thereof
  • Combined electrode for super capacitor and preparation method thereof
  • Combined electrode for super capacitor and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Preparation of graphite felt / carbon nanotube / palladium / manganese dioxide composite electrode:

[0027] Using constant potential electrophoretic deposition technology, the graphite felt substrate was used as the working electrode, the platinum electrode was used as the counter electrode, and the aqueous solution of 1.1 g / L carbon nanotubes was used as the electrolyte, and the carbon nanotube layer was electrophoretically deposited on the surface of the graphite felt substrate with a deposition potential of 10 V. After drying, a graphite felt / carbon nanotube electrode is obtained. Using constant potential electrodeposition technology, using graphite felt / carbon nanotube electrode as working electrode, platinum electrode as counter electrode, saturated calomel electrode as reference electrode, 8.5mM PdCl 2 and 0.49M H 3 BO 3 The mixed aqueous solution was used as the electrolyte, and the palladium nanoparticles were electrochemically deposited on the graphite felt / carbo...

Embodiment 2

[0030] Preparation of graphite felt / carbon nanotube / palladium / manganese dioxide composite electrode:

[0031] Using the constant potential electrophoretic deposition technology, the graphite felt substrate was used as the working electrode, the platinum electrode was used as the counter electrode, and the aqueous solution of 0.8 g / L carbon nanotubes was used as the electrolyte, and the carbon nanotube layer was electrophoretically deposited on the surface of the graphite felt substrate with a deposition potential of 10 V. After drying, a graphite felt / carbon nanotube electrode is obtained. Using constant potential electrodeposition technology, using graphite felt / carbon nanotube electrode as working electrode, platinum electrode as counter electrode, saturated calomel electrode as reference electrode, 8.5mM PdCl 2 and 0.49M H 3 BO 3 The mixed aqueous solution was used as the electrolyte, and the palladium nanoparticles were electrochemically deposited on the graphite felt / c...

Embodiment 3

[0035] Preparation of graphite felt / carbon nanotube / platinum / manganese dioxide composite electrode:

[0036] Using the constant potential electrophoretic deposition technology, the graphite felt substrate was used as the working electrode, the platinum electrode was used as the counter electrode, and the aqueous solution of 1.2 g / L carbon nanotubes was used as the electrolyte, and the carbon nanotube layer was electrophoretically deposited on the surface of the graphite felt substrate with a deposition potential of 10 V. After drying, a graphite felt / carbon nanotube electrode is obtained. Using constant potential electrodeposition technology, graphite felt / carbon nanotube electrode was used as working electrode, platinum electrode was used as counter electrode, saturated calomel electrode was used as reference electrode, and 5 mmol / L H 2 PtCl 6 and a mixed aqueous solution of 1.2 mmol / L HCl as the electrolyte, electrochemically deposited platinum nanoparticles on the graphit...

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Abstract

The invention relates to a nanometer combined electrode material for a super capacitor and a preparation method thereof. The combined electrode material for the super capacitor is as follows: the surface of a graphite felt or a foam nickel substrate material is provided with a carbon nanometer tube layer; the surface of the carbon nanometer tube layer is provided with a layer of trace discontinuous palladium or platinum or gold nanometer particles; and the carbon nanometer tube layer with a layer of trace discontinuous palladium or platinum or gold nanometer particles on the surface is provided with a manganese dioxide layer.

Description

technical field [0001] The invention relates to a capacitor electrode material and a preparation method thereof, in particular to a nanocomposite electrode material for a supercapacitor and a preparation method thereof. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, offer higher energy density than physical capacitors, higher power density and longer cycle life than batteries. It has the advantages of fast charging speed, large discharge current, high efficiency, small size, long cycle life, wide working temperature range, good reliability, maintenance-free and green environmental protection. As a backup power supply or an independent power supply, it can be widely used in the field of consumer electronics products, and can also be used in new energy power generation systems, distributed energy storage systems, intelligent distributed power grid systems and other fields. In particular, supercapacitors can be used not only as an auxi...

Claims

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Application Information

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IPC IPC(8): H01G9/058H01G11/30H01G11/86
CPCY02E60/13
Inventor 赵丹丹赵永青
Owner 昆山昆鹏利杰高分子材料技术有限公司
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