Preparation method of porous carbon electrode material for supercapacitor

A technology for supercapacitors and electrode materials, which is applied in the fields of hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, chemical instruments and methods, etc. It can solve the problems of product residual chemicals, high cost of activators, corrosion equipment, etc., and achieve shortening Diffusion distance, catalytic effect improvement, and development-promoting effect

Active Publication Date: 2019-01-01
SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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  • Application Information

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Problems solved by technology

The steam activation method is used in raw materials with a large number of pores, which can effectively overcome the disadvantages of acid and alkali activation in the traditional porous carbon preparation process, high cost of activators, corrosion of equipment, pollution of the environment, and residual chemicals in the product.

Method used

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  • Preparation method of porous carbon electrode material for supercapacitor
  • Preparation method of porous carbon electrode material for supercapacitor
  • Preparation method of porous carbon electrode material for supercapacitor

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preparation example Construction

[0022] A method for preparing a porous carbon electrode material for a supercapacitor. The method uses pitch as the main raw material, adds a pore-forming agent and a catalyst, and sequentially undergoes a mixing process, an air oxidation stabilization process, a carbonization process, and a water vapor activation process to obtain a high specific carbon electrode material. Surface area porous carbon material; comprising the steps of:

[0023] 1) Add the raw asphalt into the pore-forming agent or add the catalyst at the same time, put it in the autoclave, 2 Under pressure protection, stir at 130-160°C for 0.5-1.5 hours to obtain mixed asphalt.

[0024] 2) Crush the mixed asphalt obtained in step 1), sieve it with 0.154mm and 1mm sieves, and take intermediate particle size asphalt for air oxidation stabilization, with an air flow rate of 60-100L / h and a heating rate of 0.3-1°C / min Raise the temperature to 250-300°C, hold the temperature for 3-8 hours, and obtain an air oxidati...

Embodiment 1

[0035] Get a certain quality of coal tar pitch and 15wt% naphthalene, mix them evenly, place them in an autoclave, 2Under pressure protection, stir at 150°C for 1 hour to ensure that the asphalt and naphthalene are fully mixed. Crush the mixed asphalt, sieve it with 0.154mm and 1mm sieves, and take asphalt with intermediate particle size for air oxidation stabilization experiment. The air flow rate is 80L / h, and the temperature is raised to 270°C at a rate of 0.5°C / min. Asphalt with certain pores is required. Stabilized asphalt at 0.1L / min N 2 Under the protection of the atmosphere, the temperature was first raised to 415°C at a heating rate of 3°C / min, and then raised to 515°C at a heating rate of 5°C / min to carbonize into coke. Crumble the coke sample through a 0.075mm sieve, take the sample under the sieve, put it in a white steel mesh, move it into the activation furnace, raise the temperature to 400°C at a heating rate of 3°C / min, keep the temperature for 30min, and the...

Embodiment 2

[0038] A certain quality of oxidized pitch was used as raw material, 15wt% naphthalene and 0.5wt% ferrocene were added, placed in an autoclave, and the mixing process and air oxidation stabilization process were carried out using the test parameters of Example 1. Stabilized asphalt at 0.1L / min N 2 Under the protection of the atmosphere, the temperature was first raised to 415°C at a heating rate of 5°C / min, and then the temperature was raised to 515°C at a heating rate of 5°C / min to carbonize into coke. Break the coke sample through a 0.075mm sieve, take the sample under the sieve, put it in a white steel mesh, move it into the activation furnace, raise the temperature to 400°C at a heating rate of 5°C / min, keep the temperature for 30min, and then raise the temperature at a heating rate of 5°C / min to 950°C, when the temperature in the furnace is constant at 900°C, pass water vapor into the activation furnace at a rate of 1mL / min for activation for 1h, and finally cool down to ...

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Abstract

The invention provides a preparation method of a porous carbon electrode material for a supercapacitor. The method comprises the following steps of by taking asphalt as a main raw material, adding a pore-forming agent and a catalyst, and sequentially performing a mixing technology, an air oxidation stabilization technology, a carbonization technology and a water steam activation technology to obtain a high-specific surface area porous carbon material. Compared with the prior art, the preparation method has the beneficial effects that by taking coal asphalt as a raw material, the coal asphalt is liable to acquire and low in cost; and in addition, the disadvantages of high cost of an activator, corrosion on equipment, environmental pollution, residue of chemical medicines on products and thelike of the traditional technology of preparing the porous carbon material by using acid and alkali to perform activation. Therefore, the preparation method is economic, effective and environmentallyfriendly, is controllable in pore diameter distribution and high in specific surface area and is a preparation method relatively suitable for preparing an electrode material for the supercapacitor.

Description

technical field [0001] The invention relates to the field of porous carbon electrode materials for supercapacitors prepared from coal tar pitch, in particular to a method for preparing porous carbon with a high specific surface area. Background technique [0002] As a new type of energy storage element, supercapacitors can effectively bridge the gap between traditional capacitors and batteries due to their advantages such as long cycle life, good reversibility, high energy density and power density. In view of its many performance advantages, supercapacitors can be widely used in many fields such as automobile industry, aerospace, information technology, electronics industry, national defense technology, etc., and are the core products of low-carbon economy. [0003] As an important part of supercapacitors, electrode materials determine the performance and production cost of supercapacitors to a large extent. The research on porous carbon electrode materials mainly focuses o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/336C01B32/33H01G11/86H01G11/32
CPCC01B32/33C01B32/336H01G11/32H01G11/86Y02E60/13
Inventor 郭明聪和凤祥徐喆屈滨刘书林孙刚张金柱武全宇
Owner SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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