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A kind of preparation method of supercapacitor material

A supercapacitor, seed crystal technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, manganese oxide/manganese hydroxide, etc., can solve problems such as poor rate performance, and achieve strong capacitance retention and electrochemical performance. Good stability and low electrode internal resistance

Active Publication Date: 2019-08-27
北京点阵智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the prior art is that α-MnO 2 The surface area and porosity of β-MnO are the highest, and its specific capacity is the highest, but its rate performance is poor; while β-MnO 2 On the contrary, there is room for improvement

Method used

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  • A kind of preparation method of supercapacitor material
  • A kind of preparation method of supercapacitor material
  • A kind of preparation method of supercapacitor material

Examples

Experimental program
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Embodiment 1

[0040] Embodiment 1: a kind of preparation method of supercapacitor material, comprises the following steps:

[0041] I. Preparation of MnO 2 Seed A:

[0042] Take MnO 2 Powder, add the first crystallization solvent, sonicate at 20°C for 5 minutes, filter with nanofiltration membrane, take the filtrate and add PMMA, then place the filtrate at 20°C for 10 hours, take the dried powder and spin evaporate at 20°C Remove the solvent until the solvent content is less than 0.5wt%, and it is confirmed to be MnO by XRPD detection 2 Seed A;

[0043] The first crystallization solvent comprises 9 wt% ethyl acetate, 53 wt% methanol and 38 wt% water;

[0044] By mass, MnO 2 The consumption ratio of powder and the first crystallization solvent is 1:10;

[0045] By mass, the consumption ratio of PMMA and filtrate is 1:0.2%;

[0046] II. Preparation of supercapacitor materials:

[0047] Prepare KMnO with a concentration of 0.04mol / l 4 Aqueous solution and MnSO at a concentration of 0.06...

Embodiment 2

[0053] Embodiment 2: a kind of preparation method of supercapacitor material, the difference with embodiment 1 is,

[0054] On a mass basis, the dosage ratio of PMMA and filtrate is 1:0.3%.

Embodiment 3

[0055] Embodiment 3: a kind of preparation method of supercapacitor material, the difference with embodiment 1 is,

[0056] The preparation of step I MnO 2 In seed crystal A, PMMA was not added to the filtrate before the filtrate was exposed at 15-25°C.

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Abstract

The invention discloses a preparation method of a supercapacitor material. The preparation method comprises the steps of I, preparing an MnO2 seed crystal A: taking MnO2 powder, adding a first crystallization solvent, carrying out ultrasonography at 15 to 25 DEG C, filtering, volatilizing a filter liquor at 15 to 25 DEG C, and rotary evaporating at 15 to 25 DEG C to obtain the seed crystal A, wherein the mass ratio of the MnO2 powder to the first crystallization solvent is 1:(10 to 11); II, preparing the supercapacitor material: preparing 0.04mol / l of KMnO4 solution and 0.06mol / l of MnSO4 solution; stirring the MnSO4 solution at 45 to 48 DEG C, adding the seed crystal A, dripping the KMnO4 solution, and cleaning a precipitate to be neutral; adding a second crystallization solvent, carryingout ultrasonography at 15 to 25 DEG C, filtering, vacuum drying a precipitate at 45 to 50 DEG C, and grinding, wherein the volume ratio of the KMnO4 solution to the MnSO4 solution is 1:1, the mass ratio of the seed crystal A to a final product is (2.5 to 4.2) percent:1, so that a specific capacity is large, and a rate capability is excellent.

Description

technical field [0001] The invention relates to a preparation method of a supercapacitor material. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, are new energy storage devices between traditional capacitors and batteries. Compared with traditional capacitors, supercapacitors have higher specific capacitance and specific energy, higher operating temperature range and extremely long service life; compared with batteries, they have higher specific power and can release extremely large currents instantly, It has the characteristics of short charging time, high charging efficiency, long cycle life, no memory effect, basically no maintenance and no pollution to the environment. This kind of supercapacitor has broad application prospects in the communication market, computer market, new energy vehicles, consumer electronics, military equipment and other fields, and has become a hot research topic for many scientists around the world. Ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/02H01G11/86H01G11/46
Inventor 不公告发明人
Owner 北京点阵智能科技有限公司