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Titanium-silicon-carbon composite supercapacitor electrode material and preparation method thereof

A technology for supercapacitors and electrode materials, applied in hybrid capacitor electrodes, nanotechnology for materials and surface science, nanotechnology, etc., can solve the adverse effects of electrochemical performance improvement, poor conductivity of oxides, poor electron transport capabilities, etc. problems, to achieve the effect of improving electrochemical performance, improving electrical conductivity, and excellent processing performance

Active Publication Date: 2019-01-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation method not only has poor conductivity and poor rate performance, but also causes the material to fail after multiple cycles due to the volume change of the material during charging and discharging. The nanowires are short, poor in continuity, and axial electrons The transmission capacity is poor, and the hollow structure will have a negative effect on the improvement of electrochemical performance due to insufficient contact with the electrolyte and too much resistance
[0005] In summary, the electrochemical performance of the existing supercapacitor electrode materials still needs to be further improved, and its preparation method also needs to be further improved. Therefore, it is necessary to study a new supercapacitor electrode material and its preparation method

Method used

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  • Titanium-silicon-carbon composite supercapacitor electrode material and preparation method thereof
  • Titanium-silicon-carbon composite supercapacitor electrode material and preparation method thereof
  • Titanium-silicon-carbon composite supercapacitor electrode material and preparation method thereof

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Embodiment 1

[0039] A preparation method of a titanium-silicon-carbon-carbon composite supercapacitor electrode material, comprising the steps of:

[0040] (1) Disperse 1.2g of titanium-silicon carbon powder in a mixture of 10mL of ethanol and acetic acid, 8mL of ethanol and 2mL of acetic acid in the mixture of ethanol and acetic acid, and then add 0.8g of polyvinylpyrrolidone (average molecular weight 130,000) to prepare Spinning precursor solution, electrospinning the precursor solution, pouring the precursor solution into a 20mL ordinary syringe during electrospinning, and electrostatically spinning under the conditions of voltage 16KV, humidity 45%rh and feeding rate 1.5mL / h Spinning to obtain raw silk;

[0041] (2) Carry out pre-oxidation to the raw silk in step (1): during pre-oxidation, the heating rate is 1° C. / min, and the temperature is kept at 250° C. for 2 hours;

[0042] (3) Carbonize the pre-oxidized raw silk in step (2): the heating rate during carbonization is 2°C / min, the...

Embodiment 2

[0044] A preparation method of a titanium-silicon-carbon-carbon composite supercapacitor electrode material, comprising the steps of:

[0045] (1) Disperse 0.6g of titanium-silicon carbon powder in a mixture of 10mL of ethanol and acetic acid, 8mL of ethanol and 2mL of acetic acid in the mixture of ethanol and acetic acid, and then add 0.8g of polyvinylpyrrolidone (average molecular weight 130000) to prepare Spinning precursor solution, electrospinning the precursor solution, pouring the precursor solution into a 20mL ordinary syringe during electrospinning, and electrostatically spinning under the conditions of voltage 16KV, humidity 45%rh and feeding rate 1.5mL / h Spinning to obtain raw silk;

[0046] (2) Carry out pre-oxidation to the raw silk in step (1): during pre-oxidation, the heating rate is 1° C. / min, and the temperature is kept at 250° C. for 2 hours;

[0047] (3) Carbonize the pre-oxidized raw silk in step (2): the heating rate during carbonization is 2°C / min, the ...

Embodiment 3

[0049] A preparation method of a titanium-silicon-carbon-carbon composite supercapacitor electrode material, comprising the steps of:

[0050] (1) Disperse 0.1g of titanium-silicon carbon powder in a mixture of 10mL of ethanol and acetic acid, 8mL of ethanol and 2mL of acetic acid in the mixture of ethanol and acetic acid, and then add 0.8g of polyvinylpyrrolidone (average molecular weight 130,000) to prepare Spinning precursor solution, electrospinning the precursor solution, pouring the precursor solution into a 20mL ordinary syringe during electrospinning, and electrostatically spinning under the conditions of voltage 16KV, humidity 45%rh and feeding rate 1.5mL / h Spinning to obtain raw silk;

[0051] (2) Carry out pre-oxidation to the raw silk in step (1): during pre-oxidation, the heating rate is 1° C. / min, and the temperature is kept at 250° C. for 2 hours;

[0052] (3) Carbonize the pre-oxidized raw silk in step (2): the heating rate during carbonization is 2°C / min, the...

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Abstract

The invention relates to a titanium-silicon-carbon composite supercapacitor electrode material. ,belonging to the field of supercapacitors. The electrode material is composed of titanium silicocarbonand carbon fibers, wherein the titanium silicocarbon particles are embedded in a one-dimensional nanowire structure formed by carbon fibers. The preparation method of the electrode material comprisesthe following steps: (1) dispersing titanium silicocarbon powder in a mixed solution of ethanol and acetic acid, adding polyvinylpyrrolidone, preparing a spinning precursor, and electrospinning the precursor to obtain precursor; (2) preoxidizing the precursor of step (1) and performing carbonization treatment to obtain the precursor. The invention uses titanium silicocarbon as basic raw materialand adopts electrostatic spinning method to prepare titanium silicocarbon with one-dimensional nanowire structure. Carbon composites, which have good rate performance and cycle stability, can significantly improve the electrochemical performance of supercapacitors.

Description

technical field [0001] The invention belongs to the field of supercapacitors, in particular to a titanium-silicon-carbon-carbon composite material used for preparing supercapacitor electrode materials and a preparation method thereof. Background technique [0002] With the rapid development of the global economy, human consumption of energy materials continues to increase, and problems such as energy crisis and environmental pollution have become increasingly prominent. Therefore, exploring energy-saving, environmentally friendly, and efficient new energy technologies and new energy materials has become an urgent need for today's energy science and material science. solved problem. Supercapacitor is a new type of energy storage device, which has the characteristics of high power density, short charging time, long service life, good temperature characteristics, energy saving and environmental protection, so it has a wide range of uses. At present, the research on supercapaci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/40B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/24H01G11/30H01G11/36H01G11/40Y02E60/13
Inventor 毕见强颜伟康王伟礼郝旭霞冷明哲高希成王璐
Owner SHANDONG UNIV
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