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Preparation method of electrode material for super-capacitor

A technology for supercapacitors and electrode materials, applied in the manufacture of hybrid/electric double layer capacitors, etc., can solve the problems of small specific capacitance and low specific surface area of ​​porous carbon materials, and achieve increased capacitance, good supercapacitive properties, and good deposition effects Effect

Inactive Publication Date: 2015-04-08
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that the specific capacitance of the porous carbon material is low due to the low specific surface area, and provides a preparation method of the supercapacitor electrode material

Method used

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  • Preparation method of electrode material for super-capacitor
  • Preparation method of electrode material for super-capacitor
  • Preparation method of electrode material for super-capacitor

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specific Embodiment approach 1

[0019] Specific embodiment 1: This embodiment is a method for preparing a supercapacitor electrode material, which is specifically prepared according to the following steps:

[0020] 1. Use the modified Hummer`s method to prepare graphene oxide aqueous dispersion: weigh 1.0g~1.4g phosphorous flake graphite, 58mL~62mL H with a mass concentration of 98% 2 SO 4 Solution, 6.5mL~6.9mL phosphoric acid solution with a mass concentration of 85%~98%, 6g~10g KMnO 4 , 280mL~320mL deionized water and 28mL~32mL 30% hydrogen peroxide solution with a mass concentration of 30%; under the condition of an ice bath at a temperature of 0℃~4℃, add H to the phosphorus flake graphite 2 SO 4 Solution, phosphoric acid solution and KMnO 4 , Keep it for 2h~2.5h, then move into the temperature of 32℃~37℃ water bath and keep it for 18h~22h, then add deionized water, after standing for 10min~15min, add hydrogen peroxide solution, the whole step is carried out under stirring condition, Obtain a solid-liquid mixt...

specific Embodiment approach 2

[0026] Specific embodiment two: This embodiment is different from specific embodiment one in that the mass concentration of the hydrochloric acid solution in step one is 3%. Others are the same as the first embodiment.

specific Embodiment approach 3

[0027] Specific embodiment three: this embodiment is different from specific embodiment one or two in that the mass ratio of graphene oxide to carbon nanotubes in step two is 5:5. Others are the same as the first or second embodiment.

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Abstract

The invention relates to a preparation method of an electrode material for a super-capacitor. The preparation method aims at solving the problem that the specific capacitance is lower due to the smaller specific surface area of a porous carbon material. The preparation method comprises the following steps of: one, preparing a graphene oxide waterborne dispersing liquid; two, weighing the graphene oxide waterborne dispersing liquid and a carbon nanotube; three, obtaining a graphene / carbon nanotube mixing turbid liquid; fourth, obtaining a clean substrate; and five, obtaining the electrode material for the super-capacitor. The graphene oxide and the carbon nanotube in the electrode material for the super-capacitor prepared according to the preparation method have a good deposition effect; the carbon nanotube grows on the surface of the graphene oxide and has a three-dimensional stereochemical structure and a large surface area, thereby leading the capacitance of the electrode material for the super-capacitor to be increased. The preparation method is used for preparing the electrode material for the super-capacitor.

Description

Technical field [0001] The invention relates to a method for preparing electrode materials. Background technique [0002] Supercapacitor is a new type of energy storage device with performance between traditional capacitors and batteries. It has the characteristics of high battery specific energy and high specific power of traditional capacitors. Its specific capacity is 20 to 200 times that of traditional capacitors. , The specific power is generally greater than 1000W / kg, much longer than the cycle life of the secondary battery (more than 103 times) and better than the battery. In addition, supercapacitors also have the advantages of instantaneous high-current charging and discharging, wide operating temperature range, safety, and pollution-free. Therefore, they have unique application advantages and broad application prospects in many occasions. Supercapacitors realize charge storage through the two-dimensional or quasi-two-dimensional interaction between electrolyte ions and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86
CPCY02E60/13
Inventor 孙立国李振伟刘抱汪成
Owner HEILONGJIANG UNIV
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