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Preparation method and application of iron titanate nano material

A nanomaterial, iron titanate technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of low electrical conductivity and ion transport rate, limited electrochemical performance, etc. The effect of high specific capacity, no pollution cost, high energy density characteristics

Inactive Publication Date: 2021-01-26
泰州市海创新能源研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the intrinsic conductivity and ion transport rate of ferric titanate are not high, and most of the ferric titanate produced at present are bulk or impure phase materials, which limits its electrochemical performance.

Method used

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  • Preparation method and application of iron titanate nano material
  • Preparation method and application of iron titanate nano material
  • Preparation method and application of iron titanate nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing iron titanate (FeTi2O5) nanomaterials, comprising:

[0028] A. Add 1 mmol of iron acetylacetonate, 2 mmol of tetrabutyl titanate and 0.5 g of PAN into a 25 mL beaker, add 10 mL of DMF and stir for 12 h to obtain a uniformly mixed spinning solution;

[0029] B. Put the spinning solution obtained in step A into a 10 mL syringe, and select a No. 18 syringe needle, set the voltage to 10 kV, and set the flow rate to 1 mL h -1 , carry out electrospinning, and collect the obtained electrospun fiber on the Al foil;

[0030] C. Calcinate the electrospun fibers collected in step B at 900°C for 0.5 h in an air atmosphere, with a heating rate of 5°C min -1 , to obtain iron titanate nanomaterials;

[0031] figure 1 In , the positions and relative intensities of each diffraction peak are consistent with the JPCDS card (#41-1432), indicating that the product is iron titanate (FeTi2O5).

[0032] The ferric titanate (FeTi2O5) nanomaterial prepared in this exam...

Embodiment 2

[0035] A method for preparing iron titanate (FeTi2O5) nanomaterials, comprising the steps of:

[0036] A. Add 1 mmol of iron acetylacetonate, 3 mmol of tetrabutyl titanate and 0.2 g of PAN into a 25 mL beaker, add 5 mL of DMF and stir for 12 h to obtain a uniformly mixed spinning solution;

[0037] B. Put the spinning solution obtained in step A into a 10 mL syringe, and select a No. 18 syringe needle, set the voltage to 10 kV, and set the flow rate to 1 mL h -1 , carry out electrospinning, and collect the obtained electrospun fiber on the Al foil;

[0038]C. Calcinate the electrospun fibers collected in step B at 800°C for 0.5 h in an air atmosphere, with a heating rate of 5°C min -1 , that is, iron titanate (FeTi2O5) nanomaterials;

[0039] The ferric titanate nanomaterial prepared in this example was pre-lithiated and combined with Ketjen conductive carbon black to make a lithium ion capacitor for performance testing. The maximum power density is 11000 W / Kg and the maxim...

Embodiment 3

[0041] A method for preparing iron titanate (FeTi2O5) nanomaterials, comprising the steps of:

[0042] A. Add 2 mmol of iron acetylacetonate, 2 mmol of tetrabutyl titanate and 0.5 g of PAN into a 25 mL beaker, add 10 mL of DMF and stir for 12 h to obtain a uniformly mixed spinning solution;

[0043] B. Put the spinning solution obtained in step A into a 10 mL syringe, and select a No. 18 syringe needle, set the voltage to 10 kV, and set the flow rate to 1 mL h-1 for electrospinning. The electrospun fibers were collected on Al foil;

[0044] C. Calcining the electrospun fibers collected in step B at 800°C for 1 h in an air atmosphere with a heating rate of 5°C min-1 to obtain iron titanate (FeTi2O5) nanomaterials.

[0045] The ferric titanate nanomaterial prepared in this example was pre-lithiated and combined with Ketjen conductive carbon black to make a lithium ion capacitor for performance testing. The maximum power density is 10000 W / Kg and the maximum energy density is 9...

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Abstract

The invention provides a preparation method and application of an iron titanate nano material. According to the invention, pre-lithiated iron titanate is used as a negative electrode active substanceof a lithium ion hybrid supercapacitor; the preparation method is simple, free of pollution before and after reaction and relatively low in cost; the particle size is small, and a chain structure assembled by the particles is beneficial to transmission of electrons and lithium ions; and compared with other negative electrode materials, the pre-lithiated iron titanate nano negative electrode material has relatively high specific capacity, and the output voltage of the lithium ion capacitor can reach 4.5 V, so that the energy density of the lithium ion capacitor is greatly improved, and the lithium ion capacitor has the high energy density characteristic of a lithium ion battery and the high power density characteristic of an electric double-layer capacitor.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and relates to the preparation of nanometer materials, in particular to a preparation method and application of iron titanate nanometer anode materials. Background technique [0002] With the rapid development of society, people's demand for energy is increasing, and the requirements for electrochemical energy storage devices are getting higher and higher. Among them, supercapacitors and lithium-ion batteries have received attention in the past few years because of their advantages of high power density and high energy density, respectively. However, the low energy density of supercapacitors, and the poor cycle stability and low power density of lithium-ion batteries, these shortcomings are that they cannot meet the large demand for energy in the future, which greatly limits their practical applications. Therefore, it is urgent to develop a A new type of energy storage device with hi...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/06H01G11/50H01G11/26H01G11/24B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/06H01G11/24H01G11/26H01G11/50H01G11/86Y02E60/13
Inventor 连加彪朱王芹邹波波吉恒松
Owner 泰州市海创新能源研究院有限公司
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