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Method for preparing porous carbon for supercapacitor with salicylate complex

A technology of supercapacitor and salicylate, which is applied in the fields of hybrid capacitor electrode, hybrid/electric double layer capacitor manufacturing, carbon preparation/purification, etc., which can solve the problem that it is difficult to obtain wide application, and metal oxides are expensive and difficult to obtain Widely used and other issues to achieve the effects of improved stability, large total pore volume, and excellent capacitance performance

Inactive Publication Date: 2015-01-21
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent CN 102180895 A discloses a metal-zinc organic coordination polymer and its preparation method. A complex with optical properties and good thermal stability is synthesized, but the obtained complex has single properties and the structure is not easy to control. Difficult to be widely used
[0006] Chinese patent CN 1357899 A discloses a composite supercapacitor electrode material, which is composed of carbon nanotubes and metal composite oxides, and effectively utilizes the high specific surface area of ​​carbon nanotubes. However, due to the high price and limited sources of metal oxides, it is difficult to be widely used.
[0007] Chinese patent CN 101214951 B discloses a kind of biomass material pine needles to prepare porous carbon materials with high specific surface area and narrow pore distribution, and the specific surface area exceeds 3000m 2 / g of porous carbon, but this method involves activation process, complex process, large pollution and cumbersome follow-up treatment.

Method used

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  • Method for preparing porous carbon for supercapacitor with salicylate complex
  • Method for preparing porous carbon for supercapacitor with salicylate complex
  • Method for preparing porous carbon for supercapacitor with salicylate complex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this experiment, sodium salicylate and zinc nitrate were used to form complexes and calcined at different temperatures to prepare different porous carbon materials:

[0028] (1) Using zinc salicylate as raw material to calcinate at 800°C to prepare porous carbon

[0029] Take 3.2g of sodium salicylate and dissolve it in a beaker, and dissolve 2.97g of zinc nitrate in another beaker. Slowly pour the sodium salicylate solution into the zinc nitrate solution under stirring to form the complex zinc salicylate. After 0.5h, , filtered and washed with water until neutral, and dried in an oven at 60°C for 6 hours. Take an appropriate amount of zinc salicylate in a tube furnace in an argon atmosphere at 4°C min -1 The heating rate was raised to 800°C, and the temperature was kept constant for 2 hours. After cooling down to room temperature, the obtained sample was ultrasonically cleaned with 30% dilute hydrochloric acid or dilute nitric acid for 1 hour, stirred and reacted f...

Embodiment 2

[0034] Take 3.2g of sodium salicylate and dissolve it in a beaker, and dissolve 2.97g of zinc nitrate in another beaker. Slowly pour the sodium salicylate solution into the zinc nitrate solution under stirring to form the complex zinc salicylate. After 0.5h, , filtered and washed with water until neutral, and dried in an oven at 60°C for 6 hours. Take an appropriate amount of zinc salicylate in a tube furnace in an argon atmosphere at 4°C min -1The heating rate was increased to 900°C, and the temperature was kept constant for 2 hours. After cooling down to room temperature, the obtained sample was ultrasonically cleaned with 30% dilute hydrochloric acid or dilute nitric acid for 1 hour, stirred and reacted for 6 hours, filtered, washed with water until neutral, and dried to obtain the finished product.

[0035] In the same manner as in Example 1, the porous carbon material prepared in this example was made into a porous carbon electrode for electrochemical testing. The curve ...

Embodiment 3

[0038] Take 3.2g of sodium salicylate and dissolve it in a beaker, and dissolve 2.97g of zinc nitrate in another beaker. Slowly pour the sodium salicylate solution into the zinc nitrate solution under stirring to form the complex zinc salicylate. After 0.5h, , filtered and washed with water until neutral, and dried in an oven at 60°C for 6 hours. Take an appropriate amount of zinc salicylate in a tube furnace in an argon atmosphere at 4°C min -1 The heating rate was increased to 1000°C, and the temperature was kept constant for 2 hours. After cooling down to room temperature, the obtained sample was ultrasonically cleaned with 30% dilute hydrochloric acid or dilute nitric acid for 1 hour, stirred and reacted for 6 hours, filtered, washed with water until neutral, and dried to obtain the finished product.

[0039] In the same manner as in Example 1, the porous carbon material prepared in this example was made into a porous carbon electrode for electrochemical testing. The curv...

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Abstract

The invention discloses a method for preparing porous carbon for a supercapacitor with a salicylate complex. The method is characterized by comprising the steps of forming a coordination polymer, placing the coordination polymer in a tube furnace for 2h at 800-1000 DEG C in a nitrogen or argon atmosphere, preparing the porous carbon with the coordination polymer for the first time, cooling the porous carbon to a room temperature, taking out and grinding the porous carbon, soaking the obtained porous carbon in dilute hydrochloric acid or dilute nitric acid with mass concentration of 10-30%, performing water washing in an ultrasonic dispersion stirring manner until a solution is neutral, filtering the porous carbon, putting the porous carbon into an oven for drying for 6h at 110 DEG C, and sufficiently grinding the porous carbon to prepare a porous carbon material for the supercapacitor. In order to improve the capacitive performance of the porous carbon material, magnesium acetate serves as a template, and zinc salicylate and magnesium acetate with equal mass are directly ground and then calcinated to obtain the required carbon material. The method is simple to operate, simple in preparation technology, and innovative; the supercapacitor assembled by the porous carbon as an electrode material has the characteristics of high energy density, good product performance and the like; and the method is suitable for preparing the supercapacitor.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of porous carbon materials, and specifically relates to the formation of complexes using sodium salicylate, zinc nitrate, aluminum nitrate, iron nitrate, calcium nitrate or barium nitrate, chlorides, sulfates, etc.; A method for preparing a porous carbon material for a supercapacitor using magnesium acetate as a raw material and a template. And using the mixed electrolyte of ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate and acetonitrile to carry out electrochemical test on the obtained porous carbon. Background technique [0002] Supercapacitors not only have the high power and high cycle performance characteristics of ordinary capacitors, but also have the energy storage characteristics of batteries; and compared with traditional capacitors, supercapacitors have small size, fast charging speed, long cycle life, high discharge power, large capacity, and low operating tempe...

Claims

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Application Information

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IPC IPC(8): H01G11/24C01B31/02C01B31/08
CPCY02E60/13H01G11/86C01B32/05H01G11/24H01G11/44
Inventor 陈祥迎谢东华张忠洁陈崇
Owner HEFEI UNIV OF TECH
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