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Negative electrode carbon additive for improving charging acceptance of lead-carbon battery and application thereof

A lead-carbon battery and carbon additive technology, used in battery electrodes, negative electrodes, secondary batteries, etc., can solve the problem of not fully utilizing the characteristics of porous structures, and achieve inhibiting sulfation, prolonging cycle life, and enhancing electrical conductivity. sexual effect

Inactive Publication Date: 2019-12-13
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent aims to recycle and reuse biomass materials, but fails to make full use of the porous structure characteristics of biomass materials

Method used

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  • Negative electrode carbon additive for improving charging acceptance of lead-carbon battery and application thereof
  • Negative electrode carbon additive for improving charging acceptance of lead-carbon battery and application thereof

Examples

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Effect test

Embodiment 1

[0023] (1) Wash 10 g of rice husk, react in 200 mL, 30 wt.% sodium hydroxide solution at 100° C. for 2 h, filter, wash with purified water, and dry to obtain a desiliconized rice husk;

[0024] (2) After the desiliconized rice husk obtained in the above step (1) is carbonized in a closed environment at 600° C., it is crushed and classified to obtain rice husk-based porous carbon.

[0025] (3) The rice husk-based porous carbon obtained in the above step (2) is directly used as a negative electrode carbon additive to improve the charging acceptance capacity of lead-carbon batteries.

[0026] Weigh 1Kg of lead powder, 1.3g of short fiber, 8g of barium sulfate, 2.5g of humic acid, 2.5g of sodium lignosulfonate, 1.8g of acetylene black and 10g of negative electrode carbon additive to improve the charge acceptance of lead-carbon batteries, and dry mix them 30min, then quickly add 110mL of pure water, stir for 10min, slowly add 60mL of 51.5wt.% sulfuric acid solution and stir for 30m...

Embodiment 2

[0029] (1) Wash 10g of rice husk, react in 200mL, 35wt.% sodium hydroxide solution at 95°C for 1.5h, filter, wash with purified water, and dry to obtain a desiliconized rice husk;

[0030] (2) Carbonize the desiliconized rice husk obtained in the above step (1) in a closed environment at 650° C., and then pulverize and classify to obtain rice husk-based porous carbon.

[0031] (3) The rice husk-based porous carbon and graphite obtained in the above step (2) are uniformly mixed in a ratio of 8:3 to obtain a negative electrode carbon additive that improves the charge acceptance of lead-carbon batteries.

[0032] Weigh 1Kg of lead powder, 1.3g of short fiber, 8g of barium sulfate, 2.5g of humic acid, 2.5g of sodium lignosulfonate, 1.5g of acetylene black and 10g of negative electrode carbon additive to improve the charge acceptance of lead-carbon batteries, and dry mix them After 30min, quickly add 115mL of pure water, stir for 10min, slowly add 57mL of sulfuric acid solution (51...

Embodiment 3

[0035] (1) Wash 10g of rice husk, react in 200mL, 30wt.% potassium hydroxide solution at 90°C for 2.5h, filter, wash with purified water, and dry to obtain a desiliconized rice husk;

[0036] (2) Carbonize the desiliconized rice husk obtained in the above step (1) in a closed environment at 700° C., and then pulverize and classify to obtain rice husk-based porous carbon.

[0037] (3) The rice husk-based porous carbon obtained in the above step (2), conductive carbon black and graphite are uniformly mixed in a ratio of 7:2:3 to obtain a negative electrode carbon additive that improves the charge acceptance of lead-carbon batteries.

[0038] Weigh 1Kg of lead powder, 1.3g of short fiber, 8g of barium sulfate, 2g of humic acid, 2g of sodium lignosulfonate, 1.3g of acetylene black and 12g of negative electrode carbon additives for improving the charge acceptance of lead-carbon batteries, and dry-mix for 30min. Then quickly add 118mL of primary water, stir for 10min, slowly add 58mL ...

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Abstract

The invention discloses a negative electrode carbon additive for improving charging acceptance of a lead-carbon battery, which belongs to the technical field of lead-acid battery manufacturing. In numerous biomass materials, the content of nanoscale silicon dioxide in the rice husks is as high as 20%. The rice husk is subjected to alkali treatment to remove most of nanoscale silicon dioxide on thesurface, and carbonization is performed to obtain the rice husk-based porous carbon mainly comprising macropores / mesopores. Macroporous and mesoporous structures of the rice husk-based porous carboncan provide a good ion conductor for an energy storage device, so that the kinetic activity of electrochemical reaction is improved. The rice husk-based porous carbon is uniformly mixed with one or more of activated carbon, carbon black, graphite, expanded graphite, graphene, single-walled carbon nanotubes, multi-walled carbon nanotubes and the like, so that the conductivity of the negative electrode carbon additive is further enhanced. The carbon additive for the negative electrode of the lead-carbon battery can effectively improve the charging acceptance of the lead-carbon battery, inhibit the sulfation phenomenon of the negative electrode of the lead-acid battery in a partial state of charge (PSoC) and prolong the cycle life of the battery in the PSoC.

Description

technical field [0001] The invention belongs to the technical field of lead-acid battery production, and relates to a negative electrode carbon additive for improving the charging acceptance capacity of lead-carbon batteries. Background technique. [0002] Based on good safety, reliability and mature manufacturing recycling technology, lead-acid batteries occupy an irreplaceable important position in the field of energy storage. Emerging energy storage markets such as hybrid vehicles and renewable energy storage have grown their share year by year. These areas of energy storage require lead-acid batteries to be in partial state of charge (PSoC) for extended periods of time. The negative electrode of the lead-acid battery that has been in PSoC for a long time is gradually sulfated, resulting in a decrease in the battery's charge acceptance and battery failure. Studies have shown that the application of carbon additives in negative electrode active materials can effectively ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/587H01M4/62H01M10/0525H01M10/42C01B32/05
CPCH01M4/587H01M4/625H01M10/0525H01M10/4235C01B32/05H01M2004/027Y02E60/10
Inventor 林海波尹健
Owner JILIN UNIV
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