Negative lead paste for lead-acid storage battery and preparation method thereof

A lead-acid battery and negative electrode paste technology, which is applied in the direction of lead-acid battery electrodes, battery electrodes, negative electrodes, etc., can solve the problems of easy dissolution of lignin, battery performance degradation, etc., to reduce the shrinkage of negative active materials and improve the rate performance , the effect of good low temperature performance

Active Publication Date: 2020-01-24
CHAOWEI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem that the lignin in the negative electrode paste of the traditional lead-acid storage battery is easily dissolved and reduced during the battery formation and subsequent use, resulting in a decrease in battery performance, the present invention provides a lignin-functionalized carbon nanotube that is beneficial to Negative lead paste for lead-acid battery with improved battery rate performance

Method used

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  • Negative lead paste for lead-acid storage battery and preparation method thereof

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Embodiment 1

[0034] (1) according to the formula table of table 1, add deionized water I 10kg, outer diameter to be 5nm, interlayer spacing be 0.2kg and lignin 2kg in the high-energy nanoscale dispersion ball mill respectively;

[0035] (2) Add zirconia grinding beads for grinding, ball mill and mix for 30min at a speed of 300r / min, filter the grinding beads to obtain lignin-functionalized carbon nanotubes, and set aside;

[0036] (3) Add 1000kg of lead powder, 3kg of humic acid, 2kg of acetylene black, 10kg of barium sulfate and 0.5kg of polyacrylonitrile fiber into the paste mixing machine, and dry mix for 7 minutes;

[0037] (4) The lignin-functionalized carbon nanotube dispersion obtained in step (2) is quickly added to the paste mixer at one time, and 100 kg of deionized water II is added, and wet mixed for 5 minutes;

[0038] (5) Slowly add a sulfuric acid solution with a density of 1.4g / ml to the pasting machine, stir while adding, and control the addition within 15 minutes. After a...

Embodiment 2

[0040] (1) according to the formula table of table 1, add deionized water I 10kg, outer diameter to be 50nm, layer spacing be 0.3kg and lignin 2kg of multi-walled carbon nanotubes of 0.5nm respectively in high-energy nanoscale dispersion ball mill;

[0041] (2) Add silicon oxide grinding beads for grinding, ball mill and mix for 20 minutes at a speed of 500r / min, filter the grinding beads to obtain lignin-functionalized carbon nanotubes, and set aside;

[0042](3) Add 1000kg of lead powder, 2kg of humic acid, 3kg of acetylene black, 10kg of barium sulfate and 0.75kg of polypropylene fiber to the paste mixing machine, and dry mix for 5 minutes;

[0043] (4) The lignin-functionalized carbon nanotube dispersion obtained in step (2) is quickly added to the paste mixer at one time, and 100 kg of deionized water II is added, and wet mixed for 3 minutes;

[0044] (5) Slowly add a sulfuric acid solution with a density of 1.3g / ml into the pasting machine, stir while adding, and control...

Embodiment 3

[0046] (1) according to the formula table of table 1, add deionized water 1 20kg, carbon outer diameter respectively in the high-energy nanoscale dispersion ball mill that 25nm, interlayer spacing are 0.5kg and lignin 3kg for multi-walled carbon nanotubes of 0.4nm;

[0047] (2) Add agate beads for grinding, ball mill and mix for 10 min at a speed of 800r / min, filter out the grinding beads to obtain lignin-functionalized carbon nanotubes, and set aside;

[0048] (3) Add 1000kg of lead powder, 2kg of humic acid, 2kg of acetylene black, 10kg of barium sulfate, 0.25kg of polypropylene fiber and 0.5kg of polyester fiber into the paste mixing machine, and dry mix for 3 minutes;

[0049] (4) The lignin-functionalized carbon nanotubes obtained in step (2) are quickly added to the paste mixer at one time, and 95 kg of deionized water II is added, and wet mixed for 7 minutes;

[0050] (5) Slowly add a sulfuric acid solution with a density of 1.4g / ml to the pasting machine, stir while ad...

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Abstract

The invention relates to the technical field of storage batteries, aims to solve the problem that lignin in the negative lead paste for the traditional lead-acid storage battery is liable to dissolveand reduce in the battery formation and subsequent use process to cause battery performance degradation, and provides a negative lead paste for a lead-acid storage battery and a preparation method thereof. The negative lead paste for the lead-acid storage battery is prepared from the following components in parts by weight: 1000 parts of lead powder, 12-25 parts of lignin functionalized carbon nanotube dispersion liquid, 2-3 parts of humic acid, 2-3 parts of acetylene black, 10-12 parts of barium sulfate, 100-120 parts of deionized water, 80-100 parts of sulfuric acid and 0.5-1 part of short fibers. The lignin used in the negative lead paste for the lead-acid storage battery is beneficial to the battery having better low-temperature performance and cycle life after being anchored by the carbon nanotubes, and the carbon nanotubes can be more uniformly distributed in the negative lead paste after being functionalized by the lignin so as to improve the rate performance of the battery.

Description

technical field [0001] The invention relates to the technical field of accumulators, in particular to a negative electrode paste for lead-acid accumulators and a preparation method thereof. Background technique [0002] Lignosulfonate (hereinafter referred to as lignin) is a common organic expansion agent in lead-acid batteries. It has good dispersibility and is an anionic surfactant that can reduce the surface tension of water and change the interface between the electrode and the solution. nature. In the negative electrode of lead-acid battery, lignin can effectively inhibit the surface shrinkage of the active material of the negative electrode during charging and discharging, which is beneficial to the preservation of the capacity of the battery during use. At the same time, a large number of studies have proved that lignin can also improve the low-temperature performance of batteries. Lignin is a kind of derivative with many derivatives, complex structure, and uncertai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/56H01M4/58H01M4/583H01M4/14H01M4/16
CPCH01M4/364H01M4/56H01M4/583H01M4/5825H01M4/58H01M4/14H01M4/16H01M2004/027Y02E60/10
Inventor 阙奕鹏
Owner CHAOWEI POWER CO LTD
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