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A composite cathode material for a supercapacitor and a preparation method thereof, supercapacitor

A composite positive electrode material and supercapacitor technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of reduced specific capacitance and unsuitable for high-power charging and discharging, so as to increase the discharge voltage and reduce the range The effect of small size and high conductivity

Active Publication Date: 2019-01-22
深圳博磊达新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the aforementioned MnO 2 / CMSs composites only have good specific capacitance at low current density, and with the increase of charge and discharge current, the specific capacitance decreases greatly, which is not suitable for high-power charge and discharge.

Method used

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  • A composite cathode material for a supercapacitor and a preparation method thereof, supercapacitor
  • A composite cathode material for a supercapacitor and a preparation method thereof, supercapacitor
  • A composite cathode material for a supercapacitor and a preparation method thereof, supercapacitor

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Embodiment 1

[0040] The supercapacitor composite cathode material of the present embodiment is prepared by the method comprising the following steps:

[0041] 1) Preparation of carbon microspheres:

[0042] a) Take 20g of resorcinol and 40g of formaldehyde and mix evenly, add 1g of sodium carbonate as a catalyst, then add into 150g of double distilled water, and stir evenly at 80°C to obtain a mixed solution;

[0043] The sorbitan monooleate of 1g is added in the cyclohexane of 100ml, makes surfactant solution;

[0044] b) adding the mixture obtained above into the surfactant solution, reacting at 80° C. and stirring at a speed of 480 r / min for 6 hours, and then obtaining organogel microspheres by extracting and separating, washing with distilled water, and filtering;

[0045] c) Pour the obtained organogel microspheres into acetone and soak for 12 hours, filter, repeat three times, and finally place in air and dry at room temperature to obtain the precursor; pretreat the obtained precurs...

Embodiment 2

[0056] The supercapacitor composite cathode material of the present embodiment is prepared by the method comprising the following steps:

[0057] 1) Preparation of carbon microspheres:

[0058] a) Take 20g of resorcinol and 40g of formaldehyde and mix evenly, add 1g of sodium carbonate as a catalyst, then add into 150g of double distilled water, and stir evenly at 80°C to obtain a mixed solution;

[0059] The sorbitan monooleate of 0.5g is added in the cyclohexane of 100ml, makes surfactant solution;

[0060] b) adding the mixture obtained above into the surfactant solution, reacting at 80°C and a stirring speed of 120r / min for 12h, then extracting and separating, washing with distilled water, and filtering to obtain organogel microspheres;

[0061] c) Pour the obtained organogel microspheres into acetone and soak for 12 hours, filter, repeat three times, and finally place in air and dry at room temperature to obtain the precursor; pretreat the obtained precursor at 250°C for...

Embodiment 3

[0072] The supercapacitor composite cathode material of the present embodiment is prepared by the method comprising the following steps:

[0073] 1) Preparation of carbon microspheres:

[0074] a) Take 20g of resorcinol and 40g of formaldehyde and mix evenly, add 1g of sodium carbonate as a catalyst, then add into 150g of double distilled water, and stir evenly at 80°C to obtain a mixed solution;

[0075] The sorbitan monooleate of 2g is added in the cyclohexane of 100ml, makes surfactant solution;

[0076] b) adding the mixture obtained above into the surfactant solution, reacting at 80° C. and stirring at a speed of 720 r / min for 1 hour, and then obtaining organogel microspheres by extraction and separation, washing with distilled water, and filtration;

[0077]c) Pour the obtained organogel microspheres into acetone and soak for 12 hours, filter, repeat three times, and finally place in air and dry at room temperature to obtain the precursor; pretreat the obtained precurso...

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Abstract

The invention discloses a composite anode material for a super-capacitor, a preparation method of the composite anode material and the super-capacitor. The composite anode material is prepared from the method which includes the steps that 1, activated carbon microspheres and Mn2O3 are taken and added into an ethanol solution of Mn(NO3)2, a mixture is obtained after mixing is completed, and after the obtained mixture is dried, a carbon microsphere / Mn2O3 composite material is obtained after calcination is completed; 2, after the obtained composite material and KOH powder are mixed, heat is preserved at 400-800 DEG C for activation for 1-3 h, cooling and washing are conducted, and the composite anode material is obtained. The prepared composite anode material is of a core-shell structure, the activated carbon microspheres serve as the core, and a Mn2O3 coating layer serves as the shell; the characteristics that the carbon microspheres are large in specific area, high in conductivity and good in cycling stability are utilized, the characteristics of double electrode layers and the characteristic of high capacity of Mn2O3 are exerted, the high faradic pseudocapacitance characteristic is exerted, a synergistic effect is generated among the materials, the overall performance of the capacitor is improved, and the super-capacitor is suitable for high-power charge and discharge.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and in particular relates to a composite positive electrode material for a supercapacitor and a preparation method thereof, and also relates to a supercapacitor using the composite positive electrode material. Background technique [0002] A supercapacitor is an energy storage device between traditional capacitors and batteries. It not only has the characteristics of high power and fast charging and discharging of capacitors, but also has the energy storage characteristics of electrochemical batteries. From the perspective of the overall structure, a supercapacitor is mainly composed of positive and negative electrodes, electrolyte, diaphragm, leads and packaging materials. According to the energy storage mechanism, supercapacitors are divided into electric double-layer capacitors and Faraday quasi-capacitors. The energy storage and conversion of electric double-layer capacitors is based ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/32H01G11/46H01G11/24H01G11/26H01G11/86
CPCY02E60/13
Inventor 王燕王维原东甲
Owner 深圳博磊达新能源科技有限公司