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a porous sno 2 Microsheet and its preparation method and its application in the positive electrode of lead-carbon battery

A technology of micron flakes and polyvinylpyrrolidone, applied in the direction of lead-acid battery electrodes, battery electrodes, lead-acid batteries, etc., can solve the problems of inappropriate large-scale preparation of lead-carbon batteries, improve discharge capacity and power performance, and simple preparation technology , reduce the effect of concentration polarization

Active Publication Date: 2021-11-16
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the current preparation of porous and large-sized SnO2 is generally carried out by methods such as hydrothermal method, which is very unsuitable for large-scale preparation and practical application in the positive electrode of lead-carbon batteries.

Method used

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  • a porous sno <sub>2</sub> Microsheet and its preparation method and its application in the positive electrode of lead-carbon battery
  • a porous sno <sub>2</sub> Microsheet and its preparation method and its application in the positive electrode of lead-carbon battery
  • a porous sno <sub>2</sub> Microsheet and its preparation method and its application in the positive electrode of lead-carbon battery

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Experimental program
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Effect test

Embodiment 1

[0034] (1) Add polyvinylpyrrolidone to ethanol at a certain mass ratio and stir to dissolve, wherein; polyvinylpyrrolidone: ethanol = 2:100;

[0035] (2) A certain quality of tin tetrachloride pentahydrate is added in the ethanol solution of above-mentioned PVP, obtains white precipitate, wherein the mass ratio of PVP and tin tetrachloride pentahydrate is 1:1;

[0036] (3) filter the above-mentioned white precipitate solution, and reclaim ethanol for reuse;

[0037] (4) Dry the white precipitate in an oven at a temperature of 80° C. for 5 hours;

[0038] (5) Heat the above-mentioned dried powder to 400°C at a heating rate of 1°C / min in a muffle furnace, keep it for 1h for calcination, and cool naturally to obtain porous SnO 2 micron flakes.

Embodiment 2

[0040] (1) The porous SnO prepared by commercial positive electrode lead powder and embodiment 1 2 The micron flake additive was mixed in the stirrer for 2 hours according to 100:0.5 (mass ratio), and the required lead-carbon battery positive electrode material was obtained;

[0041] (2) Place the obtained 100g of positive electrode material in a stirrer, add 11.5g of deionized water and grind until uniform, then add 8.8g of it with a density of 1.41g / cm 3 The sulfuric acid is mixed uniformly to obtain a pre-coated lead paste, and the lead paste is evenly coated on the grid to make a green electrode plate (length 7cm and width 4cm), and the coating quality is 22 ± 0.5g. Then wrap the raw plate with non-woven fabric and roll it with polyethylene rod.

[0042] (3) Remove the wrapped non-woven fabric, and then dry the raw electrode plate in a drying oven with a relative humidity ≥ 98% and 65°C for 24 hours, and then dry it in an ordinary drying oven at 60°C for 24 hours. plate....

Embodiment 3

[0046] (1) The porous SnO prepared by commercial positive electrode lead powder and embodiment 1 2 The micron flake additive was mixed in the stirrer for 2 hours according to 100:1 (mass ratio), and the required lead-carbon battery positive electrode material was obtained;

[0047] (2) Place the obtained 100g of positive electrode material in a stirrer, add 11.5g of deionized water and grind until uniform, then add 8.8g of it with a density of 1.41g / cm 3 The sulfuric acid is mixed uniformly to obtain a pre-coated lead paste, and the lead paste is evenly coated on the grid to make a green electrode plate (length 7cm and width 4cm), and the coating quality is 22 ± 0.5g. Then wrap the raw plate with non-woven fabric and roll it with polyethylene rod.

[0048] (3) Remove the wrapped non-woven fabric, and then dry the raw electrode plate in a drying oven with a relative humidity ≥ 98% and 65°C for 24 hours, and then dry it in an ordinary drying oven at 60°C for 24 hours. plate. ...

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Abstract

The invention relates to a porous SnO2 micro-sheet, a preparation method thereof and an application in the positive electrode of a lead-carbon battery. In the present invention, tin tetrachloride pentahydrate and polyvinylpyrrolidone are directly dissolved in ethanol at room temperature to obtain a white precipitate, and the ethanol solvent is evaporated and recovered; then the white precipitate is heated in a muffle furnace and calcined at 500 degrees for 2 hours, namely Porous SnO 2 micron flakes. The preparation process of the invention is simple, the solvent can be recycled and reused, and is suitable for large-scale production. Using the material obtained in the present invention as the positive electrode of the lead-carbon battery as an additive can obviously improve energy performance and power performance.

Description

technical field [0001] The present invention proposes a porous SnO 2 The invention relates to a large-scale preparation method of microsheets, which belongs to the technical field of inorganic material preparation. [0002] technical background [0003] Since the invention and application of lead-acid battery, it has occupied a very important position in the field of electrochemical energy storage by virtue of its ultra-high cost performance, recyclable materials and excellent performance. However, with the current development of society and technology, the application scenarios of electrochemical energy storage have undergone tremendous changes, such as the emergence of new fields such as wind energy storage, start-stop, etc., which bring new opportunities and challenges to lead-acid batteries. In order to adapt to this opportunity, lead-acid batteries have been further developed, so lead-carbon batteries were born. At present, the lead-carbon battery mainly refers to addi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/14C01G19/02H01M4/62H01M10/0525H01M10/054H01M10/06G01N33/00G01N33/48B01J23/14
CPCC01G19/02H01M4/62H01M4/624H01M4/14H01M10/06H01M10/0525H01M10/054G01N33/00G01N33/48B01J23/14C01P2004/04C01P2002/72C01P2006/40B01J35/33Y02E60/10
Inventor 林海波时军
Owner JILIN UNIV
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