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Preparation method for headspace iron trioxide and polypyrrole composite electrode material

A technology of ferric oxide and composite electrodes, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as poor electrical conductivity and poor cycle performance, achieve low economic cost, improve cycle life, and strong lithium storage potential Effect

Inactive Publication Date: 2014-12-03
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among the many iron oxides, the electrode materials that researchers pay attention to mainly focus on α-Fe 2 o 3 , its theoretical capacity is high (1005mAh / g), but its cycle performance is poor, which is different from that of α-Fe 2 o 3 It is related to the poor electrical conductivity (α-Fe 2 o 3 The room temperature conductivity is 1x10 -10 Ω -1 m -1 , for a typical Mott insulator)

Method used

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  • Preparation method for headspace iron trioxide and polypyrrole composite electrode material
  • Preparation method for headspace iron trioxide and polypyrrole composite electrode material
  • Preparation method for headspace iron trioxide and polypyrrole composite electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: the preparation of ferric oxide nanotube

[0027] Mix 1mL-2mL of 0.1mol / L-0.9mol / L ferric chloride solution with 1mL-2mL of 0.01mol / L-0.04mol / L ammonium dihydrogen phosphate solution and transfer to a polytetrafluoroethylene with a capacity of 50mL In a lined high-pressure reactor, dilute with distilled water to a total volume of 40mL, react at 150°C-250°C for 1h-48h, cool to room temperature, suction filter, wash and dry to obtain ferric oxide nanotubes.

[0028] figure 1 It is a transmission electron microscope photo of ferric oxide nanotubes, and the figure shows the magnification effect of the measured parameters magnified 30,000 times. It can be seen that the morphology of the prepared ferric oxide material is tubular, and the direct diameter is about 80nm.

Embodiment 2

[0029] Embodiment 2: Preparation of ferric oxide polypyrrole composite electrode material

[0030] Add 40 mL of distilled water into the three-necked flask, add 0.2 mmol of ferric oxide nanotubes into the flask, and disperse with ultrasonic stirring for 30 min. Add 0.02g of lysine, then add 0.04g of ammonium persulfate, and finally add 15uL of pyrrole monomer (content > 98.0, Sinopharm Chemical Reagent Co., Ltd., chemically pure), and the whole process is accompanied by ultrasonic stirring until the color of the solution changes from dark to dark. After 4 hours of reaction, the ultrasonic stirring was stopped, followed by suction filtration, washing with distilled water for 3-5 times, and drying at 60°C for 2 hours to obtain the iron oxide polypyrrole nanotube composite electrode material.

[0031] Figure 2(a)(b) is the SEM image of the polypyrrole composite electrode material magnified 30,000 times and 300,000 times, from which the overall distribution and morphology of the m...

Embodiment 3

[0032] Figure 2(c) is the TEM image and SAED image enlarged 100,000 times of the ferric oxide-polypyrrole composite electrode material, which shows that the composite electrode material is hollow tube with an inner diameter of about 70-100nm and an outer diameter of It is about 75-105nm. The difference in the shadow conjecture shows that polypyrrole is successfully wrapped around the ferric oxide nanotubes and the tubular structure does not change significantly before and after compounding. The thickness of the polypyrrole coating is about 5nm. The SAED image inserted in Fig. 2(c) is a dot-halo distribution, and the annular halo shows that the surface of Fe2O3 nanotubes is successfully coated with polypyrrole. The dots show that the Fe2O3 nanotubes are single crystals growing along the [001] plane. The crystal plane family is perpendicular to the crystal planes [021] and [311], which indicates that the Fe2O3 nanotubes are composed of single crystals. Example 3: Preparation o...

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Abstract

The invention discloses a preparation method for a headspace iron trioxide and polypyrrole composite electrode material, which comprises the following processes of: preparing an iron trioxide nanotube, performing in-situ polymerization and performing acid leaching on all units, wherein the in-situ polymerization comprises the following steps of: mixing 0.1mmol-0.5mmol of iron trioxide nanotube, 0.01g-0.04g of lysine with 0.0048g-0.0288g of pyrrole unit; performing ultrasonic stirring action for 4 hours at the room temperature under the existence of 0.02g-0.06g of ammonium persulfate as an initiator to obtain a composite electrode material; immersing the prepared composite electrode material into 0.1-2mol / L of hydrochloric acid solution for 1-48 hours; and filtering and washing to obtain the headspace composite electrode material. The preparation method disclosed by the invention is simple and feasible and is low in cost, and the cycle service life of the electrode material is prolonged.

Description

1. Technical field [0001] The invention relates to a preparation method of an electrode material, in particular to a preparation method of a ferric oxide polypyrrole composite electrode material with a reserved space. 2. Background technology [0002] Polypyrrole (PPy) conductive polymer has good electrical conductivity, is environmentally friendly, and has the advantages of low polymerization potential, high electrical conductivity, and good stability. Although conductive polymers have the characteristics of fast and efficient discharge, no need for charge and discharge control circuits, long service life, wide temperature range, and no pollution to the environment, there are not many types of electrode materials for real commercial applications, and the price is relatively high. In the future, the focus should be on synthesizing new materials, finding conductive polymers with excellent doping properties, and improving the charge-discharge performance, cycle life, and therm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/60H01M4/1399
CPCY02E60/122Y02E60/10
Inventor 陈春年伏文于辰伟
Owner HEFEI UNIV OF TECH
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