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Preparing method for nano micron lead sulfate with electrochemical activity and method adopting lead sulfate to prepare lead-acid cell

A lead sulfate, nano-micron technology, applied in lead-acid battery electrodes, nanotechnology for materials and surface science, lead sulfate, etc., can solve problems such as energy consumption, high material consumption, and high pollution

Active Publication Date: 2014-04-16
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a step of high energy consumption, high material consumption and high pollution risk in this cycle process, that is, the metallurgical process of waste lead paste → metallic lead; at the same time, there is a process that consumes energy and has a certain pollution risk, that is, metallic lead → lead-containing lead oxide powder
For a long time, although it was known that PbSO 4 is the active material of lead-acid batteries, but because the PbSO usually obtained 4 The electrochemical activity is very low, so almost no one at home and abroad has studied the use of lead sulfate as a raw material for the production of lead-acid batteries; individual studies have not reported the corresponding details, and some data are doubtful

Method used

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  • Preparing method for nano micron lead sulfate with electrochemical activity and method adopting lead sulfate to prepare lead-acid cell
  • Preparing method for nano micron lead sulfate with electrochemical activity and method adopting lead sulfate to prepare lead-acid cell
  • Preparing method for nano micron lead sulfate with electrochemical activity and method adopting lead sulfate to prepare lead-acid cell

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Embodiment 1～3

[0060] Embodiment 1~3: the aqueous solution reaction of soluble lead salt solution and soluble sulfate / sulfuric acid

Embodiment 1

[0061] Embodiment 1: First, take lead nitrate and equimolar ammonium sulfate to be dissolved in the water of equivolume respectively, the concentration of solution is 0.1mol / L, then divide into two storage tanks. Secondly, add soluble chloride (such as NaCl, KCl, etc.) with 0.09 times the molar number of lead nitrate to the lead nitrate solution, and stir to dissolve it completely (if white precipitate is formed, the temperature can be raised to dissolve it). Then, the two solutions were mixed and reacted in a counterflow reactor, the flow rate was controlled to be 0.1L / min, and the residence time in the reactor was not more than 30 minutes, and the ultrafine PbSO 4 Separated from the mother liquor, then washed with water to remove impurity ions and then dried to obtain nano-micron PbSO 4 powder.

Embodiment 2

[0062] Embodiment 2: at first, take by weighing lead chloride and the potassium sulfate of slight excess (5% of lead chloride molarity of excess value) and be dissolved in the water of equal volume respectively, the concentration of solution is 0.05mol / L, separates then in the second storage tank. Secondly, add sodium lauryl sulfate with 0.1 times the molar number of lead chloride to the lead chloride solution, and stir to dissolve it completely, because the solubility of lead chloride is small, the temperature of the solution should be raised appropriately, but not more than 100°C. Then, the two solutions were mixed and reacted in a counterflow reactor, the flow rate was controlled to be 3L / min, the residence time in the reactor was no more than 20 minutes, and the ultrafine PbSO 4 Separated from the mother liquor, then washed with water to remove impurity ions and then dried to obtain nano-micron PbSO 4 powder.

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Abstract

The invention discloses a preparing method for nano micron lead sulfate with electrochemical activity and a method adopting the lead sulfate to prepare a lead-acid cell. The preparing method for nano micron lead sulfate includes the following steps: using a morphological control agent for controlling the crystal growth of lead sulfate; enabling a water solution of soluble lead salt to react with a water solution of soluble sulfate / sulfuric acid, or enabling an aqueous dispersion of lead elementary substance / insoluble lead compound to react with a water solution of sulfuric acid in a clash flow reactor; finally obtaining the nano micron lead sulfate. The preparing method for the lead-acid cell includes the following steps: adopting the lead sulfate as active substances for an anode and a cathode; preparing a positive plate and a negative plate through adding fibers, a conductive agent, an expanding agent and the like; adding membranes between the two poles; then placing the two plates in a cell box for battery charging and formation. The invention has the advantages that the nano micron lead sulfate is high in electrochemical activity; the performance of the lead-acid cell is high and the service life of the lead-acid cell is long after the nano micron lead sulfate is adopted as the active substances of the lead-acid cell; besides, the preparing methods for the lead sulfate and the lead-acid cell are simple and feasible and have the characteristics of energy conservation and environmental protection.

Description

technical field [0001] The invention relates to a preparation method of lead sulfate and a lead-acid battery, in particular to a preparation method of electrochemically active nano-micron-level lead sulfate that can be used to produce lead-acid batteries, and the preparation of lead-acid batteries by using the nano-micron-level lead sulfate Methods. Background technique [0002] Lead-acid battery is a cheap and high-quality secondary power source, which is widely used in national defense, industrial and agricultural production, power supply and daily transportation. The electrochemical reaction principle of lead-acid batteries is to convert electrical energy into chemical energy and store it in the battery when charging, and convert chemical energy into electrical energy to supply the external system when discharging. When the battery is in the charging state, the positive plate mainly contains PbO 2 , the negative plate mainly contains Pb, and the positive and negative pla...

Claims

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Application Information

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IPC IPC(8): C01G21/20H01M4/20B82Y30/00
CPCY02E60/126Y02E60/10
Inventor 雷立旭刘义高鹏然刘巍卜贤福
Owner SOUTHEAST UNIV
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