High-specific-capacitance SnO2/C porous microsphere and production method thereof

A technology of porous microspheres and high specific capacitance, which is applied in the manufacture of hybrid/electric double layer capacitors, electrodes of hybrid capacitors, circuits, etc. the application prospect and the effect of enriching the pore structure

Active Publication Date: 2014-03-26
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the technical defects of insufficient stability and low specific capacitance of the supercapacitor electrode material in the prior art, and provide a high specific capacitance, wide potential window (-1.2 ~ 0.4V), stable cycle SnO with good performance (retaining more than 91% of the specific capacitance after 1000 cycles) 2 / C porous microsphere

Method used

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  • High-specific-capacitance SnO2/C porous microsphere and production method thereof
  • High-specific-capacitance SnO2/C porous microsphere and production method thereof
  • High-specific-capacitance SnO2/C porous microsphere and production method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] S1. Weigh 2.0 g of triphenyl tin acetate and place it in a reaction vessel, and then add 50 ml of absolute ethanol to it, disperse after ultrasonic dispersion, stir and dissolve, and place the above solution in a closed high-temperature reactor at 5 ℃ min -1 The heating rate is increased to 500 ℃, and then kept at the corresponding temperature for 12 hours to obtain a black product;

[0036] S2. Filter and wash the cooled black product with deionized water and ethanol, and dry at 50°C for 8 hours to obtain a precursor;

[0037] S3. Put the precursor body into the tube furnace and set it at 2 m under nitrogen protection 3 / h The water vapor flow rate is heated and activated at 600 ℃ for 2 hours to prepare SnO 2 / C Porous microspheres.

Embodiment 2

[0039] S1. Weigh 3.0 g of triphenyl tin acetate and place it in a reaction vessel, then add 50 ml of absolute ethanol to it, disperse by ultrasonic and stir to dissolve, place the above solution in a closed high-temperature reactor, and heat it at 10 ℃ min -1 The heating rate is increased to 700 ℃, and then kept at the corresponding temperature for 12 hours to obtain a black product;

[0040] S2. Filter and wash the cooled black product with deionized water and ethanol, and dry at 80°C for 6 hours to obtain a precursor;

[0041] S3. Put the precursor body into the tube furnace and place it at 3 m under nitrogen protection 3 / h The water vapor flow rate is heated and activated at 700℃ for 2 hours to prepare SnO 2 / C Porous microspheres.

Embodiment 3

[0043] S1. Weigh 4.0 g of triphenyltin acetate and place it in a reaction vessel, then add 50 ml of absolute ethanol to it, disperse after ultrasonic dispersion, stir and dissolve, and place the above solution in a closed high-temperature reactor at 15℃ min -1 The heating rate is increased to 600 ℃, and then kept at the corresponding temperature for 12 hours to obtain a black product;

[0044] S2. Filter and wash the cooled black product with deionized water and ethanol, and dry at 80°C for 8 hours to obtain a precursor;

[0045] S3. Put the precursor body into the tube furnace and set it to 4 m 3 / h The water vapor flow rate is heated and activated at 600℃ for 2 hours to produce SnO 2 / C Porous microspheres.

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Abstract

The invention belongs to the technical field of production of inorganic nano-materials and particularly discloses a high-specific-capacitance SnO2 / C porous microsphere and a production method thereof. The SnO2 / C porous microsphere is produced with triphenyltin acetate, ethyl alcohol and potassium hydroxide by an alcohothermal synthesis-activation method. The produced SnO2 / C porous microsphere has high specific capacitance, wide potential window and good cycle stability. The alcohothermal synthesis-activation method applied is safe, nontoxic, simple, easily operable, efficient, low in cost, and easy to industrially apply.

Description

Technical field [0001] The invention relates to the technical field of the preparation of inorganic nano materials, in particular to a high specific capacitance SnO2 / C porous microsphere and a preparation method thereof. Background technique [0002] Supercapacitors are also called electrochemical capacitors. They have excellent pulse charge-discharge performance and large-capacity energy storage performance. Because of their large stored energy, light weight, and multiple charge and discharge, they have become a new type of energy storage device. The extensive attention of scientific researchers. With the rise and development of environmentally friendly electric vehicle research, supercapacitors are used in conjunction with various power batteries to form composite batteries, which are used in the power starting system of electric vehicles to protect the battery and battery during the vehicle’s starting, acceleration, and braking process. Energy saving, or directly as the power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/38H01G11/46H01M4/139H01M4/38H01M4/48
CPCY02E60/10Y02E60/13
Inventor 郑明涛何诚龙刘应亮肖勇董汉武雷炳富张浩然冯濠彬
Owner SOUTH CHINA AGRI UNIV
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