Preparation method of conductive carbon material with hierarchical porous structure, and pole plate for lead acid battery

A lead-acid battery and multi-level pore technology, applied in the field of materials science, can solve the problems of large differences in the properties of carbon materials, complex purity and preparation processes, and low carbon content in water loss, so as to increase the loading of active materials and ensure fast The effect of smooth transmission and improved cycle life

Inactive Publication Date: 2017-05-31
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

[0005] However, due to the large differences in the properties of different types of carbon materials, such as specific surface area, electrical conductivity, surface functional group type, abundance, and intercalation chemical properties, the effects of different carbon materials as negative electrode additives are very different. Increased rate isn't the only reason for improved battery performance
In addition, due to the wide potential range of the lead-acid battery, the high specific surface carbon material in the electrode may have

Method used

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  • Preparation method of conductive carbon material with hierarchical porous structure, and pole plate for lead acid battery
  • Preparation method of conductive carbon material with hierarchical porous structure, and pole plate for lead acid battery
  • Preparation method of conductive carbon material with hierarchical porous structure, and pole plate for lead acid battery

Examples

Experimental program
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Example Embodiment

[0049] Example 1: Preparation of conductive carbon material with multi-level structure

[0050] The manufacturing method includes the following steps:

[0051] 1) Synthesis of phenolic resin precursor

[0052] First, dissolve 0.61g of phenol in the temperature range of 40~42℃, add 0.13g of 20wt.% NaOH aqueous solution and stir for 10 minutes, add 1.05g of formaldehyde dropwise and keep the temperature below 50 ℃, then raise the temperature to 70~75℃ and continue to stir for 1 hour, stop the temperature rise and let the mixture cool to room temperature naturally, adjust the pH value to about 7 with hydrochloric acid, and finally use the rotary evaporator to remove the water at 50℃, and finally turn the light yellow The product was dissolved in 20wt% ethanol solution.

[0053] 2) Synthesis of hierarchical pore structure carbon / silicon oxide composite material

[0054] The carbon / silica composite material with hierarchical pore structure is prepared by co-assembling three-component struc...

Example Embodiment

[0066] Example 2: Preparation and characterization process of electrochemical characteristics of carbon electrode with hierarchical pore structure

[0067] The obtained high-conductivity multi-porous material is configured into an electrode slurry or directly combined with a conductive material to make an electrode; for example, the carbon material, a conductive agent, a binder, and a dispersion solvent are mixed uniformly in a certain proportion to obtain an electrode slurry , Coated on the current collector, dried to form an electrode. The obtained electrode is combined with the positive electrode, a separator and electrolyte are added to form an initial battery; after the battery is activated, a lead-carbon electrode with excellent performance is obtained. For example, the obtained electrode is paired with a lead oxide electrode, separated by a diaphragm, and an acidic electrolyte is added to form a single cell, and an electrochemical test is performed.

[0068] The new multi-p...

Example Embodiment

[0069] Example 3: Preparation method of negative electrode plate of lead-carbon battery

[0070] The conductive carbon material with multi-level pore structure obtained in Example 1 was added as an additive to the negative electrode and paste in different proportions, and the plate was made according to the formula of the lead-acid battery negative electrode of the electric assist bicycle (Attached Table 2). The process of curing and forming is shown in Table 3, and the specific parameters of curing and forming are shown in Table 4. Finally, after the formed electrode plate is dried, it is assembled, filled with acid and sealed by the traditional lead-acid battery, and then left for 24 hours for testing.

[0071] Table 2 Preparation formula of lead-carbon battery negative electrode

[0072]

[0073] Table 3 Lead-carbon battery curing process parameters

[0074] temperature humidity time 148℃> 98% 48h 270℃<2%

[0075] Table 4 Internal formation process parameters of lead-carbon ba...

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Abstract

The invention provides a preparation method of a conductive carbon material with a hierarchical porous structure. The method comprises: dissolving phenolic resin into an ethanol solution; dissolving a surface active agent F127 into an HCl-containing ethanol solution; then adding ethyl orthosilicate, silicon dioxide colloidal particles and the phenolic resin ethanol solution; transferring a mixture into a container, volatilizing ethanol, performing thermal polymerization in a reaction furnace of 100 DEG C to obtain a faint-yellow transparent thin film, and grinding the thin film into powder; putting the powder into a tubular muffle furnace, and performing carbonization under the nitrogen atmosphere protection; soaking a hierarchical porous structure carbon/silicon oxide composite material into HF of which the content is 5wt%, removing silicon oxide, only retaining carbon components of the hierarchical porous structure, washing a sample by using deionized water, and then performing drying to obtain the conductive carbon material with the hierarchical porous structure. According to the preparation method of the conductive carbon material with the hierarchical porous structure, the internal resistance of a lead acid battery electrode can be effectively reduced, and the utilization rate of active substances and the charge-discharge rate are improved; meanwhile, the electrode structure can be stabilized, and the recycling life is prolonged.

Description

technical field [0001] The invention belongs to the field of materials science, and relates to a battery, in particular to a preparation method of a conductive carbon material with a multi-level porous structure and a pole plate for a lead-acid battery. Background technique [0002] At present, the increasingly prominent energy crisis and environmental pollution have made the efficient storage and conversion of electric energy and clean energy an urgent problem to be solved by the whole society. Among them, electrochemical energy storage batteries are considered to be one of the most promising energy storage solutions. Compared with lithium-ion batteries, which represent the most potential high-performance secondary batteries in the 21st century, lead-acid batteries have shorter cycle life and lower energy power density. However, with its 150-year history, low price, mature technology, safety and reliability, lead-acid batteries still occupy more than 70% of the global mark...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/14H01M10/06
CPCH01M4/14H01M4/62H01M10/06Y02E60/10
Inventor 彭怡婷赖春艳徐群杰郭志刚
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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