Preparation process of modified super-capacitor carbon

A preparation process and capacitive carbon technology, which is applied in the preparation/purification of carbon, hybrid capacitor electrodes, inorganic chemistry, etc., can solve the problem of low capacitance, improve pseudocapacitive performance, increase capacitance, and improve cycle stability. Effect

Inactive Publication Date: 2021-03-02
陕西浦士达环保科技有限公司
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0004] The traditional activated carbon for capacitor electrodes has a high specific surface area, but low capacitance. Therefore, to improve the performance of activated carbon electrode materials for supercapacitors, we should not simply consider improving the specific surface area, but should comprehensively consider its surface chemical properties. From changing the carbon material Starting with the surface structure, modify the surface of carbon materials to improve capacitance performance

Method used

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  • Preparation process of modified super-capacitor carbon
  • Preparation process of modified super-capacitor carbon

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preparation example Construction

[0040] The preparation of porous carbon requires the carbon source to be obtained by high-temperature pore formation under the action of a pore-forming agent. The pore size is also difficult to distribute uniformly, and the pore-forming agent of the non-electrochemically active component is difficult to separate, which will greatly reduce the overall specific capacity; The self-assembled micelles of the permanent polystyrene-b-polyoxyethylene block polymer in a specific solvent were used as a template, and glucose was used as a carbon source to prepare polymer microspheres loaded with selenium on the surface. After calcination, the polymer microspheres Carbonization to obtain porous carbon with evenly loaded selenium on the surface, composite selenium-loaded porous carbon with phosphorus-doped activated carbon, and prepare a modified porous carbon material by high-temperature pyrolysis, based on the synergistic effect of selenium and phosphorus, improve the cycle of activated ca...

Embodiment 1

[0052] A preparation process of modified supercapacitor carbon, comprising the following steps:

[0053] S1. Carbon source solution preparation

[0054] Weigh 1 part of selenium powder, 8 parts of sodium borohydride, add 100 parts of deionized water, and 2 Stir continuously under the atmosphere until clarification, then add 5 parts of glucose, in N 2 Continue stirring under the atmosphere until clear to obtain solution A;

[0055] S2. Preparation of selenium-loaded porous carbon

[0056] Stir and dissolve the polystyrene-b-polyoxyethylene block polymer in tetrahydrofuran solvent at a material-to-liquid ratio of 10 g / L to obtain a polymer solution, add ethanol aqueous solution, and stir vigorously at a stirring rate of 800-1000 rpm for 10 minutes. To obtain solution B, the volume ratio of ethanol and water in the aqueous ethanol solution is 2:1, and the mixing volume ratio of the aqueous ethanol solution to the polymer solution is 3:1, and then quickly add the same volume of...

Embodiment 2

[0064] Mix the modified supercapacitor carbon and PTFE described in Example 1 evenly in a ratio of 10:1 by mass to obtain a paste, which is rolled into a sheet with a thickness of 200 μm, cut into an appropriate size, and applied with a pressure of 40 MPa Press the flakes onto a stainless steel grid to prepare a supercapacitor electrode.

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Abstract

The invention provides a preparation process of modified super capacitor carbon, which belongs to the field of preparation of energy storage materials, and comprises the following steps: preparing selenium-loaded porous carbon by taking micelle formed by amphiphilic polystyrene bpolyoxyethylene block polymer in a solvent as a template and glucose treated by sodium hydrogen selenide as a carbon source, and compounding the selenium-loaded porous carbon with phosphorus-doped activated carbon, the modified porous carbon material is prepared through high-temperature pyrolysis, the modified activated carbon material is prepared through compounding of selenium-loaded porous carbon and high-temperature pyrolysis, the cycling stability of the activated carbon electrode is improved based on the synergistic effect of selenium and phosphorus, meanwhile, the electrical conductivity is effectively improved, and excellent capacitance performance is shown.

Description

technical field [0001] The invention relates to the field of preparation of energy storage materials, in particular to a modified supercapacitor carbon and its preparation process and application. Background technique [0002] Supercapacitors not only have the high specific power and circulation of traditional physical capacitors, but also have the high specific energy characteristics of chemical power sources. Therefore, they can meet the conditions of use that require high specific power and high specific energy. . Due to the excellent pulse charge and discharge performance of supercapacitors and the large-capacity energy storage performance that traditional physical capacitors do not have, the application of supercapacitors in high-energy pulsed lasers has attracted widespread attention. At the same time, because of its large storage energy, light weight, and unlimited charge and discharge, it is used as a backup power source for computer systems and wireless communicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C01B32/318C01B32/342H01G11/24H01G11/34
CPCC01B32/05C01B32/318C01B32/342H01G11/24H01G11/34Y02E60/13
Inventor 王军代子龙惠建超
Owner 陕西浦士达环保科技有限公司
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