An in-situ nitrogenous polymer nitrogen-doped active carbon nanofiber and a preparation method and use thereof

A nano-carbon fiber and polymer technology, applied in the field of nano-materials, achieves the effects of uniform distribution, high specific capacitance, and reduced production costs

Inactive Publication Date: 2016-12-14
哈尔滨万鑫石墨谷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In comparison, the in-situ doping process is simple, the nitrogen content is high, and the nitrogen element can enter the carbon skeleton and exist stably. The active system is lower than 200F / g, while the highest specific capacitance of activated carbon nanofiber is only about 150F / g

Method used

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  • An in-situ nitrogenous polymer nitrogen-doped active carbon nanofiber and a preparation method and use thereof
  • An in-situ nitrogenous polymer nitrogen-doped active carbon nanofiber and a preparation method and use thereof
  • An in-situ nitrogenous polymer nitrogen-doped active carbon nanofiber and a preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) Put 6g of gelatinous bacterial cellulose into a certain amount of water, stir it with a homogenizer to make it a 100mL bacterial cellulose homogenate; add a certain amount of pyrrole to the bacterial cellulose homogenate under stirring conditions, Wherein the mass ratio of pyrrole and bacterial cellulose is 1:5; continue to stir for 1 h to disperse pyrrole in the homogenate to obtain a mixed solution; weigh ammonium persulfate in an equimolar amount to pyrrole, and prepare 40 mL of persulfate with deionized water. Ammonium sulfate solution, put the homogenate and ammonium persulfate solution in ice water to keep the ambient temperature at about 0°C, then slowly add ammonium persulfate to the mixture at a controlled rate, and the time for adding 40mL of this solution is controlled at about 50min , continue to react for 9h, obtain in-situ polypyrrole-coated bacterial cellulose; filter and wash with deionized water and ethanol;

[0058] (2) Soak the above product with ...

Embodiment 2

[0067] The mass ratio of pyrrole and bacterial cellulose in Example 1 was changed to 1:1, and other preparation processes were unchanged, and the doped modified carbon nanofiber was prepared. The performance of the obtained material was tested according to the electrochemical performance test in Example 1. According to the specific capacitance-current curve calculation, the prepared electrode has a specific capacitance of 250F / g at a current density of 0.5A / g, and a cycle charge-discharge curve at a current density of 4A / g, wherein the specific capacitance of the first discharge is 150F / g, The specific capacitance of the 5000th cycle is 124F / g, and the specific capacity retention rate is 82.67%.

Embodiment 3

[0069] The mass ratio of pyrrole and bacterial cellulose in Example 1 was changed to 1:10, and other preparation processes were unchanged, and the doped modified carbon nanofiber was prepared. The performance of the obtained material was tested according to the electrochemical performance test in Example 1. According to the specific capacitance-current curve calculation, the specific capacitance of the prepared electrode reaches 228F / g at a current density of 0.5A / g, and the cycle charge-discharge curve is carried out at a current density of 4A / g, wherein the specific capacitance of the first discharge is 187F / g, The specific capacitance of the 5000th cycle is 166F / g, and the specific capacity retention rate is 88.77%.

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Abstract

The invention provides an in-situ nitrogenous polymer nitrogen-doped active carbon nanofiber and a preparation method and use thereof. The preparation method comprises the steps of performing in-situ synthesis of a nitrogenous polymer in bacterial cellulose slurry via an oxidation process; soaking the product in an activating agent solution and performing filtering; acquiring a nitrogenous polymer / bacterial cellulose precursor after freeze drying; performing carbonization treatment on the nitrogenous polymer / bacterial cellulose precursor to obtain a nitrogen-doped active carbon nanofiber with a three-dimensional network structure. The preparation method greatly reduces material preparation steps, reduces the production cost, is easy in operate and facilitates large-scale production. When being used in super-capacitors, the nitrogen-doped active carbon nanofiber prepared by using the method can guarantee high specific capacity and high rate performance.

Description

technical field [0001] The invention belongs to the field of nanomaterials, and in particular relates to an in-situ nitrogen-containing polymer nitrogen-doped active nano-carbon fiber and its preparation method and application. Background technique [0002] In recent years, with the rapid popularization of electric vehicles and the wide application of wind and solar power generation systems, supercapacitors have once again attracted people's attention as starting devices and energy storage devices. At present, the carbon electrode materials for supercapacitors that have been commercialized are mainly activated carbon and activated carbon fibers. Among them, carbon fiber materials have the advantages of good electrical conductivity, high mechanical strength, large specific surface area and stable structure. However, carbon materials as supercapacitor electrode materials only provide electric double layer capacitance in the process of charging and discharging, so that the spec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/36
CPCY02E60/13H01G11/86H01G11/36
Inventor 袁国辉张芳平刘荣黎恩源梅佳黄友元杨斌时浩李然方振辉
Owner 哈尔滨万鑫石墨谷科技有限公司
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