Negative-pole active material for lead battery, negative pole and lead battery making method

A technology for negative active materials and lead-acid batteries, which can be used in lead-acid battery electrodes, electrode manufacturing, lead-acid batteries, etc., and can solve the problems of low battery charging and receiving performance, hindering charging reaction explanation, and low conductivity of active materials.

Inactive Publication Date: 2005-10-05
GS YUASA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding a large amount of lignin, why the charging performance of the battery will be low, has not been fully explained
However, due to the adsorption of Pb from the reactant 2+ The explanation that hinders the charging reaction, or the explanation that the conductivity of the active material is low because lignin is adsorbed on the surface of the active material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] In order to demonstrate the effects of the present invention, the inventors produced negative electrode plates containing various amounts of lignin and carbon added.

[0015] 100kg of lead powder containing about 75% by mass of PbO and about 25% of Pb, about 20 liters of Greek sulfuric acid with a specific gravity of 1.15, and 0.5% by mass of barium sulfate as an additive, mixed with a specified amount of lignin and carbon Stir together to make a paste. After the paste is filled in the grid of the matrix, it is cured and dried to produce negative plates with different lignin and carbon contents. A baffle-type sealed battery of 2V60Ah was fabricated using these negative plates. Using these batteries, a repeated cycle test of discharging at a current of 1 CA for 15 minutes at 50° C. and charging at a voltage of 2.4 V (maximum current of 1 CA) for 30 minutes was performed. After every 50 cycles, a 1CA discharge is performed, and when the discharge capacity is lower than ...

Embodiment 2

[0021] Next, by the same method as in Example 1, a negative electrode plate with carbon with different primary particle average diameters was made, a baffle type sealed battery similar to that of Example 1 was made, and the same process as in Example 1 was carried out. test. In the test, four types of carbon having primary particle average diameters of 0.5 μm, 0.1 μm, 0.05 μm, and 0.01 μm were used. The added amount of lignin was 0.5% (lower limit) and 1.5% (upper limit), and the added amount of carbon was 0.5% (lower limit) and 5.0% (upper limit).

[0022] Table 2 is a list of the batteries produced and the number of cycles representing their life. Here, the number of life cycles shown in Table 1 is the same as in Example 1, expressed as a relative number when the number of life cycles of battery No. 1 is assumed to be 100.

[0023]

Battery No.

The amount of lignin added (relative

in mass% of lead powder)

Carbon addition (relative to...

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PUM

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Abstract

In method for preparing active material of cathode in use for lead accumulator, 0.5 - 1.5%Wt lignin and 0.5 - 5.0%Wt carbon related to lead powder are added to lead powder. In method for preparing cathode in use for lead accumulator through coating lead powder on basal body, 0.5 - 1.5%Wt lignin and 0.5 - 5.0%Wt carbon related to lead powder are added to lead powder. The lead accumulator prepared according to the disclosed method possesses good performance of charging and discharging cycle lifetime in high temperature.

Description

technical field [0001] The invention relates to a negative electrode active material for manufacturing a lead storage battery, a negative electrode and a method for manufacturing the lead storage battery. Background technique [0002] Negative plates for lead storage batteries are generally produced in the following manner. In the lead powder containing about 65-80% lead monoxide, add a small amount of lignin, barium sulfate, carbon, etc., then add Greek sulfuric acid and stir to make a paste. This paste is filled in the current collector as the matrix, after aging (keep the surroundings with proper humidity and temperature) and chemical formation (to make the lead powder become an active substance in a charged state through electrification), the lead powder becomes Pb powder of the active material. [0003] Barium sulfate becomes PbSO generated in the discharge reaction 4 crystal nucleus. Therefore, by adding barium sulfate, the discharge performance of the lead storage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/16H01M4/62H01M10/12
CPCY02E60/126Y02E60/10Y02P70/50
Inventor 坪井裕一
Owner GS YUASA CORP
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