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Preparation method for manganous silicate/carbon water system button-type supercapacitor

A supercapacitor, manganese silicate technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, hybrid capacitor electrolytes, etc. performance and other issues, to achieve the effect of simple structure, increased cycle life and low cost

Active Publication Date: 2018-09-04
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it abandons the current collector, and the electrode paper is folded more times, which increases the overall internal resistance of the device, which is not conducive to the energy storage performance of the electrode material.

Method used

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  • Preparation method for manganous silicate/carbon water system button-type supercapacitor
  • Preparation method for manganous silicate/carbon water system button-type supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. After dispersing the manganese silicate / carbon (10% carbon mass percentage) material with a mass ratio of 8.5:1:0.5, acetylene black and PTFE, adding a dispersant absolute ethanol, stirring for 30 minutes, ultrasonication for 10 minutes, Grind for 10 minutes and mix evenly to form a black positive electrode slurry; put the positive electrode slurry in a blast oven at 105°C and completely dry (drying time is determined according to the actual weight of the mixture) to obtain a black powder positive electrode material mixture ;

[0021] 2. After dispersing the activated carbon material, acetylene black and PTFE with a mass ratio of 8.5:1:0.5, add dispersant absolute ethanol, stir for 30 minutes, ultrasonic for 10 minutes, grind for 10 minutes, and mix evenly to form a black negative electrode slurry Put the negative electrode slurry into a blast oven at 105°C and completely dry (drying time is determined according to the actual weight of the mixture) to obtain a black ...

Embodiment 2

[0026] The negative electrode material loading in step 3 is about 8 mg cm -2 ; In step 4, pre-soak the positive electrode sheet (5) and the negative electrode sheet (7) with 1M potassium hydroxide electrolyte for 20 minutes, and pre-soak the cellulose diaphragm (6) with potassium hydroxide electrolyte for 1 minute to make them fully wet; All the other are with embodiment 1.

[0027] The supercapacitor device assembled by this method has a rated voltage of 1.4V and a maximum capacitance of 0.6F; based on the mass of the electrode material, the maximum energy density reaches 4Wh kg-1 , the maximum power density reaches 1000W kg -1 ; 1000 laps capacitor retention rate is 60%.

Embodiment 3

[0029] In step 1, the mass proportion of manganese silicate / carbon material (carbon mass percent is 10%), acetylene black and PTFE is 8:1:1; In step 2, the mass proportion of activated carbon material, acetylene black and PTFE is 8: 1:1; All the other are with embodiment 1.

[0030] The supercapacitor device assembled by this method has a rated voltage of 2.0V and a maximum capacitance of 1.3F; based on the mass of the electrode material, the maximum energy density reaches 16Wh kg -1 , the maximum power density reaches 6000W kg -1 ; 1000 laps capacitor retention rate is 80%.

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Abstract

The invention belongs to the field of new energy, and especially relates to a preparation method for a manganous silicate / carbon water system button-type supercapacitor. The method is characterized inthat a positive electrode material is prepared by 80-85% of a manganese silicate / carbon composite material, 10% of a conductive agent and 5-10% of binder by mass; a positive electrode sheet, a negative electrode sheet and a membrane are pre-soaked in an electrolyte to make them fully wet; a negative electrode shell, a current collector, the negative electrode sheet, the membrane, the positive electrode sheet, a current collector and a positive electrode shell are sequentially assembled from the bottom to the top; the electrolyte is dipped into the negative electrode shell before the closing of the positive electrode shell, and all contents are enabled to be soaked in the electrolyte; the positive electrode shell is closed, is tightly pressed in a sealed manner and is placed quietly, and the manganous silicate / carbon water system button-type supercapacitor is obtained. The prepared manganous silicate / carbon water system button-type supercapacitor is simple in structure, is compact in size, is good in energy storage, is long in service life, is low in cost, is long in storage time, and can be widely used for new energy automobiles and consumer electronics.

Description

technical field [0001] The invention belongs to the field of new energy, and in particular relates to a method for preparing a high specific energy manganese silicate / carbon water system button-type supercapacitor. Background technique [0002] Supercapacitor is a new type of energy storage device that can charge and discharge quickly. Its advantages are long cycle life, high power density and energy density, strong anti-environmental interference, and compact size. It can be used in electric vehicles, smart grids, aerospace , national defense and military fields. According to the principle of energy storage, it can be divided into two types: electric double layer capacitor and pseudo capacitor. The current commercialized supercapacitors are mainly electric double layer capacitors using activated carbon powder as the electrode material. The electric double layer on the pore surface of activated carbon and the interface of the electrolyte is used to store charges, and the sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/84H01G11/86H01G11/30H01G11/32H01G11/26H01G11/58
CPCH01G11/26H01G11/30H01G11/32H01G11/58H01G11/84H01G11/86Y02E60/13
Inventor 张希华李斌
Owner SHANDONG UNIV
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