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Polypyrrole/copper phosphide composite material and preparation method thereof

A composite material and copper phosphide technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., to achieve great application prospects and controllable reaction processes

Active Publication Date: 2019-01-18
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Copper phosphide (Cu 3 P) Because of its unique properties, it is widely used in electricity, magnetism, optics and catalysis. Due to its high conductivity and metal-like properties, copper phosphide has been used as an anode material for lithium-ion batteries in recent years. It has been widely studied, but there are few studies on the electrical properties of supercapacitor materials, and there are few studies on the combination of polypyrrole and copper phosphide in this field.

Method used

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  • Polypyrrole/copper phosphide composite material and preparation method thereof
  • Polypyrrole/copper phosphide composite material and preparation method thereof
  • Polypyrrole/copper phosphide composite material and preparation method thereof

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preparation example Construction

[0030] The preparation method of this material comprises the following steps:

[0031] Step 1, prepare copper phosphide (Cu 3 P)Material

[0032] Dissolve cetyltrimethylbromide (CTAB) in N,N-dimethylformamide (DMF), the ratio of solid to liquid is (0.05~0.1) g: 30mL, stir evenly with magnetic force, then add copper salt , where the copper salt provides Cu 2+ The raw material is any one of copper sulfate pentahydrate, copper chloride dihydrate, and copper nitrate trihydrate. The ratio of the added copper salt and CTAB is (1~2)mmol:(0.05~0.1)g, stir evenly with magnetic force, transfer the evenly stirred solution to a stainless steel reaction kettle lined with polytetrafluoroethylene, add white phosphorus (P 4 ), adding P 4 The molar ratio with copper salt is (2-3): 1, adding P 4 Afterwards, hydrothermally react at 160-180°C for 16 hours, cool naturally to room temperature after the reaction, and obtain a black precipitate, wash the black precipitate three times in the orde...

Embodiment 1

[0041] Step 1, dissolve 0.1g of cetyltrimethyl bromide (CTAB) in 30mL of N,N-dimethylformamide (DMF), the ratio of solid to liquid is 0.1g: 30mL, stir evenly with magnetic force, then add 1mmol Copper sulfate pentahydrate was magnetically stirred until it was completely dissolved, and the resulting solution was transferred to a 50mL stainless steel reaction kettle, and then 0.248g (2mmol) of P 4 , Reacted at 180°C for 16h. After the reaction, the reaction kettle was naturally lowered to room temperature, and a black precipitate was obtained, which was washed three times with ethanol, deionized water, benzene, and ethanol respectively, and finally dried in a vacuum oven at 60°C for 24 hours to obtain a black product Cu 3 p.

[0042] Step 2: 0.03g of Cu prepared in step 1 3 P was ultrasonically dispersed in 50mL deionized water, then transferred to a three-necked flask, and 0.3g of pyrrole monomer and sodium p-hydroxybenzenesulfonate were added at 0°C. The molar ratio of pyrro...

Embodiment 2

[0045] The tensio-active agent in the step 2 of embodiment 1 is sodium lauryl sulfate, and other conditions are constant, and the product appearance that obtains remains unchanged, compares with embodiment 1, specific capacitance is lower.

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Abstract

The invention discloses a polypyrrole / copper phosphide composite material and a preparation method thereof, the material is composed of nanometer polypyrrole and copper phosphide, Because the specificsurface area of the composite two-phase particles is larger than that of the monomer, the charge storage capacity is increased, the ion transfer rate is increased, and the electrochemical performanceis greatly improved in comparison with the monomer, and it is found by cyclic voltammetry that the specific capacitance of the composite can reach 342.2 F / g, the resistance is only 2.5 Omega, and thecapacity retention rate is 81% after 3000 cycles of constant current charge and discharge. The polypyrrole / copper phosphide composite material with different surfactants was successfully prepared bya two-step method, As that preparation method of the PPy / Cu3P composite material is simple, low in cost, easy to obtain raw material, good in repeatability, controllable in reaction conditions and short in time, the prepare PPy / Cu3P composite material has good electrochemical performance, and has great application prospect in the field of supercapacitor electrode materials.

Description

【Technical field】 [0001] The invention belongs to the technical field of supercapacitor electrode material preparation, and in particular relates to a polypyrrole / copper phosphide composite material and a preparation method thereof. 【Background technique】 [0002] In recent years, the requirements of human society for mobile power and clean development have made new technologies and equipment for energy storage and conversion more and more important. As a new type of energy storage device, supercapacitor has the advantages of strong charge and discharge capacity, good stability, large capacity, and no pollution to the environment. It fills the gap between traditional capacitors and secondary batteries. It is used in mobile communications, portable Computers and electric vehicles have very broad application prospects. However, existing capacitor electrode materials often have disadvantages such as low energy density and high cost, so it is of great significance to develop ne...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/48H01G11/86
CPCH01G11/24H01G11/30H01G11/48H01G11/86Y02E60/13
Inventor 刘淑玲任静仝建波
Owner SHAANXI UNIV OF SCI & TECH
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