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Lead/carbon composite for storage battery and preparation method of lead/carbon composite material

A carbon composite material and composite material technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of unfavorable battery performance and uniform mixing, achieve the suppression of hydrogen evolution on the negative plate, increase battery capacity, and make the paste process simple and easy The effect of the operation

Active Publication Date: 2013-06-05
SHENZHEN CENT POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a small amount of hydrogen evolution inhibitor is difficult to mix evenly with lead paste through simple mechanical stirring, and adding a large amount of inhibitor increases the content of impurity elements in the negative electrode, which is not conducive to improving battery performance, and also does not fundamentally solve the problem of hydrogen evolution in the negative electrode.

Method used

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  • Lead/carbon composite for storage battery and preparation method of lead/carbon composite material

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Embodiment 1

[0031] The molar concentration is 0.1M lead salt solution 85%, conductive carbon material 15%.

[0032] Wherein, the soluble lead salt in the lead salt solution is selected from sulfate or nitrate containing lead element. The conductive carbon material is a mixture of activated carbon and acetylene black.

Embodiment 2

[0034] The lead salt solution with a molar concentration of 0.8M is 99.9%, and the conductive carbon material is 0.1%.

[0035] Wherein, the soluble lead salt in the lead salt solution is selected from carbonate, hydrochloride or complex salt containing lead element. The conductive carbon material is a mixture of carbon black, carbon nanotubes, and carbon aerogels.

Embodiment 3

[0037] The lead salt solution with a molar concentration of 0.5M is 92.5%, and the conductive carbon material is 7.5%.

[0038] Wherein, the soluble lead salt in the lead salt solution is selected from acetate containing lead element. The conductive carbon material is made of conductive carbon fiber.

[0039] The preparation method of lead / carbon composite material for accumulator that the present invention proposes, the steps are as follows:

[0040] Step 1. First, weigh the soluble lead salt according to the formula ratio of the lead / carbon (Pb / C) composite material for storage battery, and mix it with deionized water to form a lead salt solution. The concentration of the lead salt solution is the molar concentration, and can also be converted into a weight percent concentration. Then weigh the conductive carbon powder according to the formula ratio of the lead / carbon composite material for storage battery, add it into the lead salt solution, and stir to obtain a mixture. ...

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Abstract

The invention discloses a lead / carbon composite for a storage battery. The lead / carbon composite is prepared from the following raw materials in percent by weight: 85-99.9 percent of lead-salt solution and 0.1-15 percent of conductive carbon material, wherein the lead salt solution is prepared from a soluble lead salt and deionized water, and the mol concentration of the lead salt solution is 0.1-0.8M. The invention also discloses a preparation method of the lead / carbon composite for the storage battery. The lead / carbon composite is substantially a conductive carbon material modified by lead oxide. Lead has the characteristics of low resistivity, high plasticity and high hydrogen evolution overpotential. The characteristics of the lead ensure that the hydrogen evolution overpotential of the carbon material after modified by PbO in a lead-acid battery is remarkably increased; and meanwhile the charging current occupied by partial hydrogen evolution reaction in a charging process is reduced, and the charging efficiency is increased.

Description

technical field [0001] The invention relates to the technical field of lead-acid batteries / super batteries, in particular to a lead / carbon (Pb / C) composite material which coats the surface of a conductive carbon material in liquid phase. Background technique [0002] With the development of new energy vehicles, lead-acid batteries with a development history of more than 100 years have become one of the key development targets for new energy vehicle batteries due to their mature technology, low cost, and good safety. However, under the HRSoP (high rate partial state of charge) cycle of traditional lead-acid batteries, a lead sulfate crystal layer will be formed on the surface of the negative plate, resulting in a decrease in battery discharge performance and a decrease in cycle life. [0003] Australia's CSIRO (Commonwealth Scientific and Industrial Research Organization) proposed the concept of a super battery, adding carbon materials to the negative plate to play the role o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38
CPCY02E60/12Y02E60/10
Inventor 李建立张华农胡金丰孙鹏洪鹤衣守忠彭斌
Owner SHENZHEN CENT POWER TECH
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