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Electrode material for super capacitor and preparing method thereof

A technology for supercapacitors and electrode materials, applied in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, capacitors, etc., can solve problems such as limited specific energy, low decomposition voltage, and narrow working potential window of capacitors, so as to improve specific energy , low cost, simple process effect

Active Publication Date: 2009-03-25
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the current research on capacitors based on activated carbon / metal oxide composites focuses on aqueous electrolytes, but due to the low decomposition voltage of water (theoretically up to 1.23V), the capacitors prepared have a narrow operating potential window, which limits their use. energy; and its research in organic solution system is rarely reported

Method used

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  • Electrode material for super capacitor and preparing method thereof
  • Electrode material for super capacitor and preparing method thereof
  • Electrode material for super capacitor and preparing method thereof

Examples

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Effect test

Embodiment 1

[0038] 1) Accurately weigh 10g of mesophase carbon microspheres and 80g of KOH, add an appropriate amount of deionized water to mix into a slurry, place the mixed slurry in a stainless steel burning boat, put it into a resistance furnace, and heat it at 2°C / h under the protection of an argon atmosphere. Heat up to 950°C at a heating rate of 1.5h, keep it warm for 1.5h, cool down to room temperature with the furnace, take out the product and wash it with deionized water until neutral, and dry it at 130°C to obtain 3.8g with a specific surface area of ​​3426m 2 / g of activated mesophase carbon microspheres;

[0039]2) Weigh 1.0 g of the activated mesophase carbon microspheres prepared in step 1) and add to 40 g of manganese nitrate ethanol aqueous solution (ethanol: water = 5: 1) with a mass concentration of 5.0%, stir magnetically for 2 h, and let stand Adsorbed for 12 hours, suction filtered to remove excess manganese nitrate ethanol aqueous solution, and dried at room tempera...

Embodiment 2

[0044] 1) Accurately weigh 10g of mesophase carbon microspheres, 40g of KOH and 20g of NaOH, add an appropriate amount of deionized water to mix into a slurry, place it in a resistance furnace, and heat it to 1000°C at a heating rate of 1°C / min under the protection of a nitrogen atmosphere. ℃, keep warm for 0.5h, cool to room temperature with the furnace, take out the product and wash it with deionized water until neutral, and dry it at 110℃ to obtain 4.37g with a specific surface area of ​​3169m 2 / g of activated mesophase carbon microspheres;

[0045] 2) Weigh 2 g of the activated mesophase carbon microspheres prepared in step 1) and add them to 60 g of manganese nitrate aqueous ethanol solution (ethanol: water = 1:1) with a mass concentration of 2%, stir magnetically for 4 hours, and let stand for adsorption 20h, suction filtration to remove excess manganese nitrate ethanol aqueous solution, dry at room temperature to obtain the active mesophase carbon microsphere mixed pow...

Embodiment 3

[0050] 1) Accurately weigh 10g of mesophase carbon microspheres and 40g of NaOH, add an appropriate amount of deionized water to mix into a slurry, place it in a resistance furnace, heat it to 800°C at a heating rate of 5°C / min under the protection of a nitrogen atmosphere, and keep it warm. After 2 hours, cool down to room temperature with the furnace, take out the product, wash it with deionized water until it is neutral, and dry it at 120°C to obtain 5.17g with a specific surface area of ​​2987m 2 / g of activated mesophase carbon microspheres;

[0051] 2) Weigh 5 g of the activated mesophase carbon microspheres prepared in step 1) and add them to 50 g of manganese nitrate ethanol aqueous solution (ethanol: water = 3: 1) with a mass concentration of 10%, stir magnetically for 3 h, and let stand for adsorption 24h, suction filtration to remove excess manganese nitrate ethanol aqueous solution, dry at room temperature to obtain active mesophase carbon microsphere mixed powder ...

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Abstract

The invention relates to an electrode material used by a super capacitor. The electrode material is an activated meso-carbon micro-bead / manganese oxide compound electrode material, and comprises the following components by weight: 1 part of the activated meso-carbon micro-beads with the specific surface area to be 2500-3500m<2> per g; and 10-40 parts of an ethanol solution of manganese nitrate. The preparation method for the electrode material used by the super capacitor comprises the following steps: the meso-carbon micro-beads and an activating agent are weighted according to a certain mass ratio, mixed into pulpous state with water, and activated after being placed into a resistor furnace, thereby obtaining the activated meso-carbon micro-beads; the activated meso-carbon micro-beads are added into the ethanol solution of manganese nitrate and subjected to absorption, thereby obtaining an intermediate product, that is mixed powder body; and then the mixed powder is placed into the resistor furnace for heating reaction, thereby obtaining the activated meso-carbon micro-bead / manganese oxide compound electrode material. The activated meso-carbon micro-bead / manganese oxide compound electrode material prepared by the method has the characteristics of high output voltage, high single electrode specific capacity and high specific energy.

Description

(1) Technical field: [0001] The invention relates to an electrode material, in particular to an electrode material for a supercapacitor; the invention also relates to a preparation method of the electrode material. (two) background technology: [0002] Supercapacitor (Supercapacitor), also known as Electrochemical Capacitor (EC), is a new type of energy storage device between traditional capacitors and batteries. Because of its unique advantages such as large energy storage (more than 2.5W·h / kg), high power (more than 500W / kg), light weight, long cycle life, and no pollution to the environment, it is favored by people. [0003] Supercapacitors can be divided into two types according to the mechanism of storing electric energy: one is "electric double layer capacitor", and its capacitance is mainly based on the electric double layer capacitance generated by the separation of charges on the electrode / electrolyte. The other is called "Faraday quasi-capacitor", which is mainly ...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01G9/058H01G11/32H01G11/86
CPCY02E60/13
Inventor 王红强李庆余李泽胜杨建红钟新仙黄有国代启发胡思江王芳平
Owner GUANGXI NORMAL UNIV
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