Graphene-polyaniline secondary battery and preparation method thereof

A secondary battery and polyaniline technology, applied in battery electrodes, battery pack components, circuits, etc., can solve problems such as polyaniline mismatch

Active Publication Date: 2017-10-24
威海天鲲新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problem that the graphite capacity on the negative electrode does not match the polyaniline in the existing lithium-polyaniline battery method, and provides a graphene with high safety, high specific capacity, high specific energy and long cycle life. -Polyaniline secondary battery and preparation method thereof

Method used

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  • Graphene-polyaniline secondary battery and preparation method thereof
  • Graphene-polyaniline secondary battery and preparation method thereof
  • Graphene-polyaniline secondary battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Positive electrode preparation: In a 2L reaction system, add 1.5g (accounting for 3% of the mass of aniline) activated carbon and 261ml of 7.5mol / L hydrochloric acid solution. After soaking for 10 minutes, add 522ml of 1mol / L aniline solution, stir for 30 minutes, and cool down the system solution to about 0-5°C. Dissolve 6.8g of manganese dioxide in 150ml of 7.5mol / L hydrochloric acid solution, and add it to the reaction system at one time. After 1 hour of reaction, slowly and evenly add 261ml of 2mol / L ammonium persulfate solution to the system (drip after about 2 hours), and let it react for about 4 hours. Then add nano-graphite sheets (accounting for different percentages of aniline mass), continue to react for 0.5h, and filter under reduced pressure. Add deionized water to the polyaniline wet powder, stir evenly, add solid ascorbic acid, and place in a water bath. Under the condition of 60°C, react for 2h. Then add ammonia water, dedope at room temperature for 1...

Embodiment 2

[0029] The film coated with polyaniline in Example 1 is used as the positive electrode of the battery, the film coated with graphene is used as the negative electrode of the battery, lithium hexafluorophosphate is used as the electrolyte, and the mixture of different mass ratios of ethylene carbonate and propylene carbonate is used as an organic solvent to prepare electrolyte , a graphene-polyaniline battery was assembled in a glove box by using a positive and a negative matching method. After standing still for 24 hours, the charge and discharge test was carried out. The relationship between the mass ratio of ethylene carbonate and propylene carbonate and the discharge specific capacity of polyaniline is as follows figure 2shown. It can be seen from the figure that when the mass ratio of ethylene carbonate to propylene carbonate is 1.6:1, the discharge specific capacity of polyaniline is higher, that is, the mass ratio of ethylene carbonate to propylene carbonate is 1.6:1, ...

Embodiment 3

[0031] The film coated with polyaniline in Example 1 is used as the positive electrode of the battery, the film coated with graphene is used as the negative electrode of the battery, and the mixture of ethylene carbonate and propylene carbonate containing different concentrations of lithium hexafluorophosphate electrolyte is used as the electrolyte, and one positive and one negative are used. The positive and negative electrodes are matched, and the graphene-polyaniline battery is assembled in the glove box. After standing still for 24 hours, the charge and discharge test was carried out. The relationship between the discharge specific capacity of polyaniline and the concentration of lithium hexafluorophosphate in the electrolyte is as follows image 3 shown. It can be seen from the figure that the discharge specific capacity of polyaniline increases with the increase of lithium hexafluorophosphate concentration in the electrolyte. When the concentration of lithium hexafluoro...

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Abstract

The invention provides a graphene-polyaniline secondary battery and a preparation method thereof to overcome the technical problem that the capacity of graphite on a negative electrode is not matched with polyaniline in conventional preparation methods for lithium-polyaniline batteries. The negative electrode material of the secondary battery is a graphene or graphene oxide material; the positive electrode of the secondary battery is a polyaniline / carbon material; an electrolyte of the secondary battery is an organic solvent containing lithium hexafluorophosphate; and a diaphragm is a glass fiber diaphragm or polyethylene microporous diaphragm. The invention also provides the preparation method. The graphene-polyaniline secondary battery and the preparation method thereof are applied to the field of battery preparation.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a graphene-polyaniline secondary battery and a preparation method thereof. Background technique [0002] The Chinese invention patent with the patent number ZL201310446138.X discloses a lithium-polyaniline battery. Compared with lithium-ion batteries, in addition to the specific capacity, specific energy and cycle life, it also has obvious advantages, such as lower cost, Less investment, high safety, environmental friendliness, overcharge and discharge resistance. [0003] The negative electrode of lithium-polyaniline battery is graphite, but the mass of negative electrode active materials such as graphite coated on copper foil generally does not exceed 6mg / cm 2 , otherwise the electrolyte is difficult to penetrate. At present, the theoretical capacity of the ideal lithium intercalation carbon material graphite is 372mAh / g, and the actual capacity is about 300mAh / g, so the graphite cap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01M4/60H01M2/16
CPCH01M4/583H01M4/60H01M50/409Y02E60/10
Inventor 徐鹏韩家军
Owner 威海天鲲新能源科技有限公司
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