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Nano polyaniline sulfenyl composite material and application of nano polyaniline sulfenyl composite material

A nano-polyaniline and composite material technology, which is applied in the direction of electrode manufacturing, active material electrodes, electrical components, etc., can solve the problems affecting the cycle performance of positive electrode materials and limited sulfur content, and achieve the inhibition of dissolution and shuttle effects. The manufacturing process is simple, The effect of high energy density

Inactive Publication Date: 2015-01-07
NANJING ZHONGCHU NEW ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, only the adsorption performance of carbon nanofibers can support a limited amount of sulfur, and at the same time, the polysulfides produced by sulfur on the surface of carbon nanofibers during charging and discharging will dissolve in the electrolyte, affecting the cycle performance of positive electrode materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 3) Preparation of nano-polyaniline sulfur-based composite materials: Mix sodium dodecylbenzenesulfonate and hydrochloric acid in a three-necked flask at a molar ratio of 1:4, add deionized water, and stir with an electromagnetic stirrer until a milky solution is formed , the amount of substance added is aniline twice that of hydrochloric acid, and stirred to a white emulsion; slowly add an appropriate amount of n-butanol dropwise, and continue to mix and stir to obtain a transparent microemulsion A; weigh an appropriate amount of ammonium persulfate and dissolve it in deionized water, add The carbon nanofiber / sulfur composite material whose mass is 4 times that of aniline content is ultrasonically dispersed, and slowly added dropwise to the microemulsion; after the dropwise addition, polymerize in a water bath at 25°C for a period of time, add an appropriate amount of ethanol, and use it after suction filtration Distilled water and ethanol were washed repeatedly, and dri...

Embodiment 2

[0050] Example 3:

[0051] 1) Preparation of carbon nanofibers: Prepare cellulose nanofibers by electrospinning, soak the prepared cellulose nanofibers in 3% zinc chloride aqueous solution, shake in a water bath at 60°C for about 12 hours, take out Dry in a blast drying oven with programmable temperature rise at 85°C for 24 hours; place the dried fibers in a carbonization furnace and heat at a high temperature of about 550°C for 30 minutes to obtain carbon nanofibers; wash the carbon nanofibers with dilute hydrochloric acid for 6 times to remove Zinc oxide, and finally washed with deionized water until the aqueous solution is neutral.

Embodiment 3

[0053] Example 4:

[0054] The charge-discharge cycle test was carried out on the manufactured battery, charged at 1C to 2.2V, discharged at 0.5C, and the discharge cut-off voltage was 1.2V. The test results are as follows:

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Abstract

The invention discloses a nano polyaniline sulfenyl composite material and a preparation method and application of the nano polyaniline sulfenyl composite material. The preparation method of the nano polyaniline sulfenyl composite material comprises the following steps: adding sulfur, performing compounding on carbon nanofibers and the sulfur, and then adding aniline and coating by virtue of a micro-emulsion method to obtain the nano polyaniline sulfenyl composite material. Nano polyaniline is utilized for coating the material, so that on one hand, the occurrence of dissolution and shuttling effects of sulfur reduction products can be further restrained, on the other hand, the capacity of an electrode can be complemented by virtue of reversible oxidation reduction characteristics of the polyaniline so as to improve the capacity of a battery. The preparation method of the positive electrode material is simple to operate, easily available in raw materials, safe, environmentally-friendly and high in capacity.

Description

technical field [0001] The invention belongs to the field of electrochemical and new energy products, and relates to a nano polyaniline sulfur-based composite material and a preparation method thereof. The invention also relates to a secondary aluminum battery using the composite material to prepare positive electrodes. Background technique [0002] The development of grid-connected renewable energy, electric vehicles and smart grids urgently requires a high-energy density, safe and environmentally friendly energy storage system. The secondary aluminum-sulfur battery system uses aluminum or aluminum alloy as the negative electrode and sulfur as the positive electrode. One of the battery systems that meets these needs. [0003] Compared with existing electrode materials, aluminum, the metal element with the largest reserves in the earth's crust, has the advantages of high theoretical density, abundant resources, low price, environmental friendliness, and safe use. The theor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/62H01M4/04H01M10/054
CPCH01M4/139H01M4/362H01M4/628H01M10/054H01M2004/028Y02E60/10
Inventor 赵宇光汪清
Owner NANJING ZHONGCHU NEW ENERGY
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