Carbon-coated titanium potassium phosphate nanoparticles and its preparation method and application

A nanoparticle and carbon-coated technology, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, to achieve the effects of improving electronic conductivity, excellent rate performance, and mild conditions

Active Publication Date: 2019-09-10
安徽国芯新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the modification of potassium titanium phosphate has been reported in the literature, the carbon-coated KTi in this experiment 2 (PO 4 ) 3 Nanoparticles have yet to be reported

Method used

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  • Carbon-coated titanium potassium phosphate nanoparticles and its preparation method and application
  • Carbon-coated titanium potassium phosphate nanoparticles and its preparation method and application
  • Carbon-coated titanium potassium phosphate nanoparticles and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Carbon Coated KTi 2 (PO 4 ) 3 A method for preparing nanoparticles, comprising the steps of:

[0027] 1) Dissolve 3mmol of phosphoric acid in a mixed solution of 30mL of ethanol and 30mL of ethylene glycol, and stir until uniformly mixed.

[0028] 2) Add 2 mmol of potassium acetate and 1 mmol of tetrabutyl titanate to the mixed solution obtained in step 1) in sequence, and stir for 2 hours.

[0029] 3) The product obtained in step 2) is centrifugally filtered, the precipitate is washed twice with alcohol, and dried at 70° C. to obtain the precursor.

[0030] 4) Put the precursor obtained in step 3) into a tube furnace, heat it up to 750°C in argon and keep it warm for 2 hours, and then naturally cool to room temperature to obtain carbon-coated KTi 2 (PO 4 ) 3 nanoparticles.

[0031] KTi coated with carbon of this example 2 (PO 4 ) 3 Nanoparticles as an example, the structure of which is determined by X-ray diffractometer. like figure 1 As shown, the X-ray di...

Embodiment 2

[0035] Carbon Coated KTi 2 (PO 4 ) 3 A method for preparing nanoparticles, comprising the steps of:

[0036] 1) Dissolve 3mmol of phosphoric acid in a mixed solution of 30mL of ethanol and 30mL of ethylene glycol, and stir until uniformly mixed.

[0037] 2) Add 2 mmol of potassium acetate and 1 mmol of tetrabutyl titanate to the mixed solution obtained in step 1) in sequence, and stir for 2 hours.

[0038] 3) The product obtained in step 2) is centrifugally filtered, the precipitate is washed twice with alcohol, and dried at 70° C. to obtain the precursor.

[0039] 4) Put the precursor obtained in step 3) into a tube furnace, heat it up to 750°C in argon and keep it warm for 2 hours, and then naturally cool to room temperature to obtain carbon-coated KTi 2 (PO 4 ) 3 nanoparticles.

[0040] KTi coated with product carbon of the present invention 2 (PO 4 ) 3 Nanoparticles, for example, are small particles with a diameter of 100-200 nanometers.

[0041] With the carbon...

Embodiment 3

[0043] Carbon Coated KTi 2 (PO 4 ) 3 A method for preparing nanoparticles, comprising the steps of:

[0044] 1) Dissolve 3mmol of phosphoric acid in a mixed solution of 25mL of ethanol and 30mL of ethylene glycol, and stir until uniformly mixed.

[0045] 2) Add 2 mmol of potassium acetate and 1 mmol of tetrabutyl titanate to the mixed solution obtained in step 1) in sequence, and stir for 2 hours.

[0046] 3) The product obtained in step 2) is centrifugally filtered, the precipitate is washed twice with alcohol, and dried at 70° C. to obtain the precursor.

[0047] 4) Put the precursor obtained in step 3) into a tube furnace, heat it up to 750°C in argon and keep it warm for 2 hours, and then naturally cool to room temperature to obtain carbon-coated KTi 2 (PO 4 ) 3 nanoparticles.

[0048] KTi coated with product carbon of the present invention 2 (PO 4 ) 3 Nanoparticles, for example, are small particles with a diameter of 100-200 nanometers.

[0049] With the carbon...

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Abstract

The invention relates to a carbon-cladded KTi2(PO4)3 nano particle and a preparation method. The material can be used as a sodium ion battery anode active material, with the size of 100 to 200 nanometers; carbon uniformly covers the surface of a KTi2(PO4)3 nano particle, thus forming a carbon layer; the KTi2(PO4)3 nano particle is KTi2(PO4)3 of a rhombohedron phase; the carbon layer is 1 to 10 nanometers in thickness. The carbon-cladded KTi2(PO4)3 nano particle has the beneficial effects that the potassium titanyl phosphate nano particle with a shorter sodium ion diffusion path is obtained, and the electronic conductivity of the material is improved. The obtained carbon-cladded KTi2(PO4)3 nano particle is relatively high in sodium ion diffusion rate and relatively high in electronic conductivity; when being used as the sodium ion battery anode active material, the carbon-cladded KTi2(PO4)3 nano particle provides excellent rate capability, cycling performance at high rate and relatively high specific capacity, and is a high-rate and long-service-life application material to a sodium ion battery.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemical devices, in particular to carbon-coated KTi 2 (PO 4 ) 3 The nanoparticle and its preparation method, the material can be used as the negative electrode active material of the sodium ion battery. Background technique [0002] In the past ten years, lithium-ion batteries have been widely used in electric vehicles and portable electronic devices due to their high energy density and long service life, making our lives more convenient. However, due to the lack of lithium resources on the earth, lithium-ion batteries have been unable to meet the growing market demand. In recent years, sodium-ion batteries have gradually come out. It not only has a similar reaction mechanism to lithium-ion batteries, but also can avoid the limitations caused by resource scarcity. It is considered to be a very promising new energy storage system. Sodium and lithium have similar physical and c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/366H01M4/5825H01M4/625H01M10/054Y02E60/10
Inventor 麦立强彭陈盛进之安琴友
Owner 安徽国芯新材料股份有限公司
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