Synthetic method of electrode material polyaniline

A synthesis method and electrode material technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low yield of polyaniline, achieve the effects of improving utilization, improving electrical activity, and increasing yield and capacity

Active Publication Date: 2013-04-24
WEICHAI POWER CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

The above-mentioned electrochemical method has few side reactions, and the obtained polyaniline has few impurities, high battery capacity, and good electrochemical performance. However, the current density of the electrochemically synthesized polyaniline is generally not more than 2mA / cm 2 , when producing 1kg polyaniline, 1m 2 The positive electrode requires at least 28.3 hours of electrolysis, resulting in a low yield of electrochemically synthesized polyaniline

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  • Synthetic method of electrode material polyaniline
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  • Synthetic method of electrode material polyaniline

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[0033] The invention provides a kind of synthetic method of electrode material polyaniline, comprises the following steps:

[0034] a) dissolving aniline in perchloric acid solution, reacting in the presence of ferric sulfate or manganese dioxide at a temperature below 10°C to obtain a reaction solution;

[0035] b) adding the perchloric acid solution dissolved in ammonium persulfate dropwise in batches to the reaction liquid obtained in step a), and continuing the reaction at a temperature below 10° C. to obtain polyaniline as an electrode material.

[0036]In the embodiment of the present invention, aniline, iron sulfate or manganese dioxide are added to the perchloric acid solution for reaction, and the temperature is controlled not to exceed 10° C. to obtain a reaction solution.

[0037] The present invention uses perchloric acid as an acidic reaction medium, and in this strongly acidic reaction system, aniline can exist in the form of aniline salt (aniline acidified ion),...

Embodiment 1

[0058] Add 46mL perchloric acid to 250mL deionized water, stir 3min, prepare perchloric acid solution, then take out 50mL described perchloric acid solution for subsequent use, and add 1.2g manganese dioxide in the described perchloric acid solution of surplus, Cool down to 5°C to obtain a perchloric acid solution containing manganese dioxide;

[0059] Add 5 mL of perchloric acid to 95 mL of deionized water, then add 26.5 g of ammonium persulfate, stir to dissolve, then cool down to 5°C to obtain a perchloric acid solution in which ammonium persulfate is dissolved;

[0060] Add 1.6g of phenolic carbon to the spare 50mL perchloric acid solution, stir for 15 minutes, ultrasonically disperse for 10 minutes, then add 9.6g of aniline, and stir for 10 minutes to dissolve the aniline in the perchloric acid solution to obtain aniline phenolic carbon mixed liquid;

[0061]Pour the aniline-phenol-formaldehyde-carbon mixed solution into the cooled perchloric acid solution containing man...

Embodiment 2

[0068] Add 1.2L of perchloric acid to 6L of deionized water, stir for 3 minutes, add 18.9g of manganese dioxide, and cool down to 5°C (take 300mL of water and put it in the refrigerator in advance to make ice cubes to increase the cooling speed), and the obtained manganese perchloric acid solution;

[0069] Add 150mL of perchloric acid to 2.8L of deionized water, then add 1200g of ammonium persulfate, stir to dissolve and cool down to 5°C to obtain a perchloric acid solution in which ammonium persulfate is dissolved;

[0070] Add 180mL of perchloric acid to 1.2L of deionized water, lower the temperature to below 10°C to obtain a perchloric acid solution, add 420g of aniline to it, then add 126g of phenolic carbon, stir for 1 hour, and dissolve the aniline in the perchloric acid solution , to obtain aniline phenolic carbon mixture;

[0071] Pour the aniline-phenol-formaldehyde-carbon mixture into the cooled perchloric acid solution containing manganese dioxide for reaction, fi...

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Abstract

The invention provides a synthetic method of electrode material polyaniline. The synthetic method comprises the following steps of: (a) dissolving aniline into a perchloric acid solution, and reacting at below 10 DEG C in the presence of ferric sulfate or manganese dioxide, thereby obtaining reaction liquid; and (b) dropping a perchloric acid solution with dissolved ammonium persulfate in batches in the reaction liquid obtained from the step (a), and reacting continuously at below 10 DEG C, thereby obtaining the electrode material polyaniline. According to the invention, ferric sulfate or manganese dioxide as well as ammonium persulfate are taken as oxidizing agents for complex use; perchloric acid is taken as a reaction medium, and the reaction temperature is controlled to be below 10 DEG C; the synthetic technology enables the productivity and capacity of polyaniline during the whole synthetic process to be much high, solves the problems of low productivity and poor capacity of a traditional method, and is suitable for industrial production; and further, according to the invention, activated carbon with excellent conductivity and adsorption is added during the synthetic process, so that a traditional chemical oxidation method is changed into an electrochemical oxidation method, and meanwhile, the utilization ratio of the electrode material is improved.

Description

technical field [0001] The invention relates to the technical field of electrode materials, in particular to a method for synthesizing polyaniline, an electrode material. Background technique [0002] Due to the heavy metal pollution of traditional lead-acid batteries and the environmental pollution caused by strong acid electrolytes, the research and development of new secondary batteries has attracted extensive attention from various countries. Among them, the use of polyaniline as the battery cathode material is a hot spot in the research of new secondary battery cathode materials in recent years. The main reason is that polyaniline (PANi) is an important conductive polymer, and its main chain contains alternating benzene rings and Nitrogen atoms have many advantages such as high electrical conductivity, redox reversibility, good chemical stability, cheap and easy-to-obtain raw materials, and non-toxic and environmentally friendly. [0003] The synthesis of polyaniline i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02C08K3/04C08J9/00C08L79/02H01M4/60
CPCY02E60/10
Inventor 韩尔樑韩家军程瑾宁刘信奎潘凤文崔胜民张芳
Owner WEICHAI POWER CO LTD
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