Positive electrode lead plaster of lead acid storage battery

A lead-acid battery, positive lead paste technology, applied in lead-acid batteries, battery electrodes, circuits, etc., can solve the problems of unstable ionic liquid properties, decomposition and oxidation, etc., to improve curing efficiency, high dispersion, and inhibit loss. Effect

Inactive Publication Date: 2015-04-01
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a positive lead paste for lead-acid batteries, which solves the problem that the ionic

Method used

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  • Positive electrode lead plaster of lead acid storage battery
  • Positive electrode lead plaster of lead acid storage battery
  • Positive electrode lead plaster of lead acid storage battery

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] The positive lead paste formula, in weight percentage, consists of the following components: Shimadzu-style lead powder 75%, lead oxide 5%, chemical fiber 0.1%, 1-ethyl-3-methylimidazole trifluoromethanesulfonate Acid salt ([Emim]OTf) 0.1%, graphite 0.1%, high purity water 10%, sulfuric acid 9.7% with a weight concentration of 50%.

[0029] According to the above formula and paste, the storage battery was made according to the existing process, with no addition of 1-ethyl-3-methylimidazole triflate as a blank control, and the lead paste disclosed in CN102610823A Example 1 as a comparative example . Carry out cycle life test according to the traditional method, the result is as follows figure 1 Shown:

[0030] After 200 times of charging and discharging, the discharge time of the battery made of the lead paste of the present invention is significantly higher than that of the blank control and the comparative example. The blank control and the comparative e...

Example Embodiment

[0031] Example 2

[0032] The positive lead paste formula, in weight percentage, consists of the following components: Shimadzu-style lead powder 85%, lead oxide 1%, chemical fiber 0.05%, 1-octyl-3-methylimidazole trifluoromethanesulfonate Acid salt ([Omim]OTf) 0.4%, graphite 0.5%, high purity water 7%, sulfuric acid 6.05% with a weight concentration of 40-50%.

[0033] According to the above formula and paste, the microelectrode was made according to the traditional method, with no addition of 1-ethyl-3-methylimidazole trifluoromethanesulfonate as a blank control, and the lead paste disclosed in CN102610823A Example 1 as a comparative example . A three-electrode system was used to test the overpotential for hydrogen evolution and oxygen evolution, the results are as follows figure 2 Shown:

[0034] Compared with the blank control and the contrast ratio, the hydrogen evolution and oxygen evolution overpotential of the microelectrode prepared by using the lead paste of Example 2 wa...

Example Embodiment

[0035] Example 3

[0036] Positive lead paste formula, in weight percentage, composed of the following components: Shimadzu-style lead powder 80%, lead oxide 2.5%, chemical fiber 0.1%, 1-butyl-3-methylimidazole trifluoromethanesulfonic acid Salt ([Bmim]OTf) 0.2%, graphite 0.2%, high purity water 9%, and sulfuric acid 8% with a weight concentration of 40-50%.

[0037] According to the above formula and paste, the battery was assembled according to the traditional process, with no addition of 1-ethyl-3-methylimidazole triflate as a blank control, and the lead paste disclosed in Example 1 of CN102610823A as a comparative example. After the battery has been used for a period of time, take out the lead paste on the electrode plate and perform a scanning electron microscope test. The results are as follows image 3 Shown:

[0038] The active material of the present invention maintains a better porous structure and crystal shape, the formed lead sulfate crystals are small, and the active ...

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Abstract

The invention discloses a positive electrode lead plaster of a lead acid storage battery. The positive electrode lead plaster comprises ionic liquid, wherein the ionic liquid is alkyl imidazole trifluoro-mesylate which can improve hydrogen evolution and oxygen evolution over-potential of active substances to further inhibit the loss of charging and discharging water and reduce battery failures caused by drying-up of water. The alkyl imidazole trifluoro-mesylate has relatively low surface tension, and can be well compatible with other substances to ensure that an inorganic material has a relatively high nucleation rate, therefore, by adding alkyl imidazole trifluoro-mesylate into the positive electrode lead plaster, the crystallization rate of lead sulfate in a discharging process can be improved, and the super-saturation degree of lead sulfate is reduced to ensure that loosened and porous lead sulfate is generated on the surface of a positive electrode plate.

Description

technical field [0001] The invention relates to the technical field of lead-acid batteries, in particular to a positive lead paste for lead-acid batteries. Background technique [0002] At present, lead-acid batteries have an absolute advantage in the market due to their advantages of low price, safety and reliability, and abundant raw materials, but their low power density and specific energy limit their application. Because the performance of lead-acid batteries (such as service life, etc.) mainly depends on the positive electrode, most of the existing research is focused on the improvement of the positive electrode, and the formulation of lead paste is the most important. In the prior art, additives are generally added to the lead paste to improve the utilization rate and cycle life of the positive electrode active material. For example, various carbon materials such as carbon black and graphite can effectively improve the conductivity of the active material and maintain...

Claims

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Application Information

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IPC IPC(8): H01M4/57
CPCH01M4/57H01M10/06Y02E60/10
Inventor 何文祥高根芳朱健代飞胡国柱
Owner TIANNENG BATTERY GROUP
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