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A kind of preparation method of lead-carbon composite material used for lead-carbon battery negative electrode additive

A composite material and lead-carbon battery technology, applied in battery electrodes, lead-acid batteries, circuits, etc., can solve the problems of increasing battery internal resistance, reducing battery discharge capacity, reducing the active utilization rate of battery negative electrodes, etc., to achieve large natural reserves , easy to obtain, and the effect of improving electrochemical performance

Active Publication Date: 2021-06-01
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the lead-acid battery is discharged, the negative electrode active material sponge lead will react to form non-conductive lead sulfate crystals, which increases the internal resistance of the battery, reduces the utilization rate of the battery’s negative electrode activity, and reduces the discharge capacity of the battery. When working under the working condition of HRPSoC, the negative electrode will produce serious irreversible sulfation phenomenon. In addition, the hydrogen evolution problem of the negative electrode of the battery will also be aggravated, further aggravating the irreversible sulfation phenomenon of the negative electrode of the lead-acid battery, which greatly affects the lead-acid battery. cycle life

Method used

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  • A kind of preparation method of lead-carbon composite material used for lead-carbon battery negative electrode additive
  • A kind of preparation method of lead-carbon composite material used for lead-carbon battery negative electrode additive
  • A kind of preparation method of lead-carbon composite material used for lead-carbon battery negative electrode additive

Examples

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Effect test

Embodiment 1

[0034] Peel the eggplants purchased from the market; place the peeled eggplants in saturated lead acetate solution; soak for 48 hours; dry the soaked eggplants at 80°C; place the dried eggplants in In a tube furnace, heat up to 700°C at 5°C / min, keep warm at 700°C for 3 hours, and then cool naturally; wash and dry the above-mentioned high-temperature-treated product to obtain the final desired product. In this example The obtained lead-carbon composite material is used as the negative electrode additive of lead-carbon battery.

[0035] The lead-carbon composite material prepared by the above method was characterized by scanning electron microscopy to study the microscopic morphology of the lead-carbon composite material. The results are as follows figure 1 shown. From figure 1 It can be clearly seen that the nanoscale lead particles are intercalated in the carbon material, rather than simply loaded on the surface of the carbon material, which effectively increases the lead l...

Embodiment 2

[0039] Peel the eggplants purchased from the market; place the peeled eggplants in saturated lead acetate solution; soak for 48 hours; dry the soaked eggplants at 80°C; place the dried eggplants in In a tube furnace, heat up to 600°C at 5°C / min, keep warm at 600°C for 3 hours, and then cool naturally; wash and dry the product after the above high-temperature treatment to obtain the final desired product.

Embodiment 3

[0041] Peel the eggplants purchased from the market; place the peeled eggplants in saturated lead acetate solution; soak for 48 hours; dry the soaked eggplants at 80°C; place the dried eggplants in In a tube furnace, heat up to 800°C at 5°C / min, keep warm at 800°C for 3 hours, and then cool naturally; wash and dry the product after the above high temperature treatment to obtain the final desired product.

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Abstract

The invention discloses a method for preparing a lead-carbon composite material used as a lead-carbon battery negative electrode additive. The preparation includes the following steps: soaking the peeled eggplant in a lead source; drying the soaked peeled eggplant; Under an inert atmosphere, calcinate at high temperature in a tube furnace, wash, and dry to obtain a lead-carbon composite material. The lead-carbon composite material is added to the lead-acid battery negative electrode at 2% mass fraction as the lead-carbon battery negative electrode additive, and the lead-carbon composite material is added to the negative electrode of the lead-acid battery at a mass fraction of 76%. The lead powder with an oxidation degree of 100% can effectively inhibit the hydrogen evolution reaction of the negative electrode of the lead-acid battery and prolong the cycle life of the lead-acid battery.

Description

technical field [0001] The invention relates to the field of lead-carbon battery materials, in particular to a method for preparing a lead-carbon composite material used as an additive for the negative electrode of the lead-carbon battery. Background technique [0002] With the rapid development of the global economy, there have been a series of problems such as the increasing shortage of global energy sources and the intensification of environmental pollution. Therefore, people urgently need to find efficient, clean and sustainable new energy sources to replace traditional energy sources such as coal and oil. [0003] As a new type of energy storage equipment, lead-acid batteries are low in cost, safe and reliable, long in cycle life, and large in energy storage scale. A hotspot of energy system research. At the same time, lead-acid batteries have a very high resource recycling rate, and the lead regeneration rate has reached 98%, so that the pollution generated by lead en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M10/06
CPCH01M4/628H01M10/06Y02E60/10
Inventor 高云芳管立徐新
Owner ZHEJIANG UNIV OF TECH