Negative electrode of lead-carbon battery and preparation and application thereof

A lead-carbon battery and negative electrode technology, which is applied in the field of electrochemical power supply, can solve the problems of affecting the service life of lead-acid batteries and the decrease of battery capacity, so as to enhance charge acceptance and low-temperature starting performance, reduce water loss, and avoid uneven mixing problem effect

Inactive Publication Date: 2019-06-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, when the lead-acid battery is discharged with a large current, the positive and negative electrodes will be seriously sulfated, that is, the lead sulfate with large grains generated in the active materials of the positive and negative electrodes is difficult to convert into the active materials of the positive and negative electrodes during charging. Agglomerated large particles of lead sulfate will greatly reduce the capacity of the battery and seriously affect the service life of the lead-acid battery, while carbon materials with high conductivity can form a conductive network in the negative active material, inhibiting the impact of high current density on the battery. The impact of the battery and the formation of sulfate, so the research and preparation of carbon materials with excellent performance is the top priority

Method used

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  • Negative electrode of lead-carbon battery and preparation and application thereof
  • Negative electrode of lead-carbon battery and preparation and application thereof
  • Negative electrode of lead-carbon battery and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Put 10g of carbon fiber into CO 2 Burn in a gas furnace at 800°C for 6 hours; then mix the activated carbon fibers with 0.2g of lead nitrate evenly, and then undergo poisoning treatment at 300°C for 1 hour under an inert atmosphere to obtain poisoned carbon fibers. Weigh 100g of lead powder, additives (1.2g of barium sulfate, 0.2g of lignin), and 0.5g of modified carbon fiber, and pour them into the container of a paste machine for 5 minutes, so that all components are fully mixed to obtain a mixture. Add 10g deionized water to the mixed powder, stir for 5 minutes, then slowly add the density 1.2g / cm 3 10g of sulfuric acid was stirred evenly to obtain negative electrode lead paste. The obtained lead-carbon battery negative electrode paste is directly coated on the negative electrode grid, rolled and acid-leached, and then placed in a humidity-controllable high-low temperature box for curing and drying procedures, and cured at 45°C and 95% relative humidity for 36 hours...

Embodiment 2

[0026] Put 10g of carbon fiber into CO 2 Burn in a gas furnace at 800°C for 6 hours; then mix the activated carbon fibers with 0.2g of lead nitrate evenly, and then undergo poisoning treatment at 300°C for 1 hour under an inert atmosphere to obtain poisoned carbon fibers. Weigh 100 g of lead powder, additives (1.2 g of barium sulfate, 0.2 g of lignin), and 1.0 g of modified carbon fiber and pour them into the container of a paste machine and dry mix them for 5 minutes to fully mix the components to obtain a mixture. Add 10g deionized water to the mixed powder, stir for 5 minutes, then slowly add the density 1.2g / cm 3 10g of sulfuric acid was stirred evenly to obtain negative electrode lead paste. The obtained lead-carbon battery negative electrode paste is directly coated on the negative electrode grid, rolled and acid-leached, and then placed in a humidity-controllable high-low temperature box for curing and drying procedures, and cured at 45°C and 95% relative humidity for ...

Embodiment 3

[0028] Put 10g of carbon fiber into CO 2 Burn in a gas furnace at 800°C for 6 hours; then mix the activated carbon fibers with 0.2g of lead nitrate evenly, and then undergo poisoning treatment at 300°C for 1 hour under an inert atmosphere to obtain poisoned carbon fibers. Weigh 100 g of lead powder, additives (1.2 g of barium sulfate, 0.2 g of lignin), and 1.5 g of modified carbon fiber and pour them into a paste machine container for 5 minutes to dry mix each component thoroughly to obtain a mixture. Add 10g deionized water to the mixed powder, stir for 5 minutes, then slowly add the density 1.2g / cm 3 10g of sulfuric acid was stirred evenly to obtain negative electrode lead paste. The obtained lead-carbon battery negative electrode paste is directly coated on the negative electrode grid, rolled and acid-leached, and then placed in a humidity-controllable high-low temperature box for curing and drying procedures, and cured at 45°C and 95% relative humidity for 36 hours , dri...

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Abstract

The invention relates to a negative electrode of a lead-carbon battery. The negative electrode contains 0.1-50wt% of modified carbon fibers, and the modified carbon fibers are obtained by activating and then poisoning carbon fibers. The cost of the lead-carbon battery is reduced, the internal resistance of the battery is reduced by a conductive network structure in a negative plate, the sulfationof the battery is effectively inhibited, the water loss during the cycle life process of the lead-carbon battery is reduced, the hydrogen evolution overpotential is improved, the high-rate partial state of charge (HRPSOC) of the lead-carbon battery in some nuclear power states is extended, and the battery charge acceptance ability and low temperature start performance are enhanced.

Description

technical field [0001] The invention relates to the field of electrochemical power sources, in particular to a negative electrode of a lead-carbon battery. Background technique [0002] Lead-carbon battery is a new type of high power density super battery technology that combines the advantages of lead-acid batteries and asymmetric capacitors. It can not only give full play to the energy advantages of lead-acid batteries, but also give full play to the instantaneous power and large capacity of supercapacitors. The advantages of charging have become the focus of the development of the international new energy storage industry. This kind of battery adds activated carbon materials to the negative electrode of the lead-acid battery as a charge buffer material. Instantly gather and store a large amount of charge to ensure that the battery can be charged in a short period of time, which can meet the long-term stable discharge under high current density, and better adapt to the dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/14H01M4/20H01M10/06
CPCY02E60/10
Inventor 阎景旺张华民席耀宁李先锋王再红霍玉龙
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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