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Method for preparing lead-acid battery negative pole

A lead-acid battery, negative electrode technology, applied in the field of chemical power supply and resource regeneration cycle, can solve the problems of low conversion current efficiency, low conversion success rate, no practical value, etc., to improve utilization, reduce production links, current efficiency and The effect of satisfying production efficiency

Inactive Publication Date: 2003-06-25
WUHAN UNIV
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Problems solved by technology

[0005] Literature ("Electrochemistry", 2000, vol.6, p95) reported that a small amount of lead paste (about 0.1 g) was filled into a polytetrafluoroethylene sleeve (diameter 8mm, depth 1mm) using polytetrafluoroethylene emulsion as a binder In the preparation of pasted electrodes, although polytetrafluoroethylene strengthens the electrode structure, due to its hydrophobicity, the lead paste is easy to fall off during the formation process, and the success rate of formation is low; at the same time, the formation current efficiency is extremely low, and the formation power is 15-15% of the theoretical power. 20 times, time-consuming 240-480 hours, no practical value

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  • Method for preparing lead-acid battery negative pole
  • Method for preparing lead-acid battery negative pole
  • Method for preparing lead-acid battery negative pole

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Embodiment 14

[0039] Embodiment 14 has provided the preparation process of making bigger pole plate (10Ah): Weigh lead carbonate 229.99 grams, additive 2.54 grams, 12mol / L H 2 SO 4 71.8ml (equivalent to 110% of stoichiometric). PbCO 3 Fully mix with additives, then slowly add sulfuric acid, and stir rapidly at the same time, the whole process of adding sulfuric acid lasts for about 6 minutes, continues to stir for about 10 minutes, and then stands for about 30 minutes to obtain 335.70 grams of lead paste. Spread about 120 grams of lead paste evenly on a 100*150mm Pb-Ca alloy grid, apply a pressure of 20MPa, and transfer to a drying room (temperature 30°C, relative humidity 90%) to cure for 24 hours. The resulting green plate was treated with 0.5mol / L Na 2 SO 4 The solution was energized at 900mA for 30 hours to obtain a cooked plate. The actual capacity measured in 5mol / L sulfuric acid solution is about 9.8Ah, and the utilization rate of active material is about 59.4%.

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Abstract

The present invention relates to the perparation process of lead-acid accumulator negative pole with lead carbaonate as material. It includes the following steps: grinding and sieving lead carbonate; imxing with additives and reaction with sulfuric acid to produce lead paste; painting the lead paste to Pb-Sb or Pb-Ca alloy slab lattice; setting the slab lattice into sodium sulfate and / or sulfuric acid solution for constant current compounding to obtain the negative pole board. Compared with traditional preparation process, the present invention has less steps, lower power consumption, high material utilizatino and thus lower production cost. The production process may be combined with the recovery of waste lead-acid accumulator to reuse material and reduce pollution.

Description

technical field [0001] The invention relates to a method for preparing a negative electrode of a lead-acid storage battery using lead carbonate as a raw material, and belongs to the technical field of chemical power supply and resource regeneration. Background technique [0002] Lead-acid battery is a widely used secondary power source. Compared with other chemical power sources, it has many advantages, such as: low cost, easy to obtain raw materials, high current discharge, wide temperature range, can be made into various sizes, high electrical efficiency, can be used for floating charge, no memory effect etc. Lead-acid batteries occupy an absolute dominant position in the fields of uninterruptible power supplies for communications, automotive starting power supplies, and traction power supplies. Worldwide, the annual consumption of lead-acid batteries is more than 10 billion US dollars, and 88% of the total annual lead production in the United States is used for the prod...

Claims

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Application Information

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IPC IPC(8): H01M4/16
CPCY02E60/126Y02E60/10
Inventor 汪的华李智勇周津耘戴忠旭周运鸿
Owner WUHAN UNIV
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