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Pyrolytic carbon composite material with embedded multi-shell antimony oxide-antimony alloy and its preparation method

A technology of composite materials and antimony alloys, applied in structural parts, electrical components, battery electrodes, etc., to achieve good dispersion, ease volume expansion, and buffer volume changes

Active Publication Date: 2020-09-01
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above three modification methods have certain effects on improving the performance of antimony oxide-antimony negative electrodes, but a single method cannot completely solve the above key problems of antimony oxide-antimony alloy composites

Method used

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  • Pyrolytic carbon composite material with embedded multi-shell antimony oxide-antimony alloy and its preparation method
  • Pyrolytic carbon composite material with embedded multi-shell antimony oxide-antimony alloy and its preparation method
  • Pyrolytic carbon composite material with embedded multi-shell antimony oxide-antimony alloy and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0044] A pyrolytic carbon composite material embedded with multi-shell antimony oxide-antimony alloy, the composite material is formed by carbon-coated nano-scale antimony oxide-antimony alloy particles uniformly embedded on the pyrolytic carbon structure, the multi-shell The shell structure is adjusted by controlling the heat treatment time and temperature; the diameter of the antimony oxide-antimony alloy particles is 5-30nm, and the thickness of the carbon coating layer is 1-5nm.

[0045] The preparation method of the pyrolytic carbon composite material embedded with multi-shell antimony oxide-antimony alloy of the present invention comprises the following steps:

[0046] Step 1, prepare the precursor:

[0047](1) Template agent NaCl (20.64g), antimony source (SbCl 3 ,0.423g) and carbon source (citric acid, 2.5g) were dissolved in deionized water (75ml), magnetically stirred for 3h to make a mixed and clarified mixed solution;

[0048] (2) The prepared mixed solution was ...

Embodiment 2

[0058] A pyrolytic carbon composite material embedded with multi-shell antimony oxide-antimony alloy, the composite material is formed by carbon-coated nano-scale antimony oxide-antimony alloy particles uniformly embedded on the pyrolytic carbon structure, the multi-shell The shell structure is adjusted by controlling the heat treatment time and temperature; the diameter of the antimony oxide-antimony alloy particles is 5-30nm, and the thickness of the carbon coating layer is 1-5nm.

[0059] The preparation method of the pyrolytic carbon composite material embedded with multi-shell antimony oxide-antimony alloy of the present invention comprises the following steps:

[0060] Step 1, prepare the precursor:

[0061] (1) template agent NaCl (60.34g) antimony source (SbCl 3 ,0.423g) and carbon source (citric acid, 2.5g) were dissolved in deionized water (75ml), magnetically stirred for 2h to make a clear mixed solution;

[0062] (2) The prepared mixed solution was pre-frozen in ...

Embodiment 3

[0071] A pyrolytic carbon composite material embedded with multi-shell antimony oxide-antimony alloy, the composite material is formed by carbon-coated nano-scale antimony oxide-antimony alloy particles uniformly embedded on the pyrolytic carbon structure, the multi-shell The shell structure is adjusted by controlling the heat treatment time and temperature; the diameter of the antimony oxide-antimony alloy particle is 5-30nm, and the thickness of the carbon coating layer is 1-5nm.

[0072] The preparation method of the pyrolytic carbon composite material embedded with multi-shell antimony oxide-antimony alloy of the present invention comprises the following steps:

[0073] Step 1, prepare the precursor:

[0074] (1) Template agent NaCl (20.85g), antimony source (SbCl 3 ,0.423g) and carbon source (citric acid, 2.5g) were dissolved in deionized water (75ml), magnetically stirred for 4h to make a mixed solution;

[0075] (2) The prepared mixed solution was pre-frozen in a refr...

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Abstract

A pyrolytic carbon composite material embedded with multi-shell antimony oxide-antimony alloy and its preparation method, belonging to the technical field of battery negative electrode materials; the composite material is composed of carbon-coated nano-scale antimony oxide-antimony alloy particles and pyrolytic carbon Carbon-coated nano-scale antimony oxide-antimony alloy particles are evenly embedded on pyrolytic carbon; preparation method: 1) Mix NaCl: carbon source: tin source, dissolve with deionized water, magnetically stir and completely freeze After solidification, carry out freeze vacuum drying; 2) carry out heat treatment once, cool to room temperature; 3) wash, filter and dry; Pyrolytic carbon composites of antimony-antimony oxide-antimony alloys. The composite material of the present invention is used as the negative electrode of the battery in the potassium ion half-cell test, and at a specific current density, the reversible capacity for the first charge is 300-650mAh g ‑1 , after 25-100 cycles, the capacity is 150-490mAh g ‑1 .

Description

technical field [0001] The invention belongs to the technical field of negative electrode materials for batteries, and relates to a negative electrode material technology for potassium ion batteries, in particular to a pyrolytic carbon composite material embedded with a multi-shell antimony oxide-antimony alloy and a preparation method thereof. Background technique [0002] Due to the continuous depletion of traditional fossil energy and the aggravation of global environmental problems, the development of sustainable and clean energy has attracted more and more attention. Secondary batteries have become one of the most promising energy storage devices due to their high energy conversion efficiency and portability. Potassium-ion batteries are of great interest due to the chemical properties of lithium-ion, abundant natural resources, and low cost. [0003] In recent years, research on potassium-ion batteries has mainly focused on carbon-based materials, but their theoretical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/48H01M4/62
CPCH01M4/364H01M4/366H01M4/38H01M4/48H01M4/625Y02E60/10
Inventor 王志远董康泽罗绍华刘延国王庆张亚辉郝爱民
Owner 东北大学秦皇岛分校