Preparation method of pb/c supercapacitor battery negative electrode

A technology for supercapacitors and negative electrodes of batteries, applied in the field of energy storage devices, can solve the problems of accelerating the storage and release of electric energy by the pole pieces, poor infiltration of the pole pieces to the electrolyte, and low utilization rate of the negative electrode active material, so as to improve the conductivity of the electrodes. , Excellent adsorption performance, large specific capacitance

Active Publication Date: 2018-06-22
SICHUAN NEWBORN POWER MFG
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Problems solved by technology

[0003] The invention aims to improve the power density and energy density of the existing lead-acid battery, increase the service life and charge storage capacity, and solve the problem of low utilization rate of the active material of the negative electrode of the existing lead-acid battery, poor wettability of the pole piece to the electrolyte, and water loss. Serious and other shortcomings, provide a high utilization rate of active materials, good conductivity, high chemical stability, good power characteristics, low leakage current, high energy density, high power density, outstanding low temperature performance, low temperature (~ 30 ℃) charge and discharge The efficiency is greater than 60%, which can accelerate the storage and release of electric energy of the pole piece, and has a high specific capacity and high specific power. The preparation method of the negative electrode of the Pb / C supercapacitor activated carbon battery

Method used

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  • Preparation method of pb/c supercapacitor battery negative electrode

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Experimental program
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Effect test

Embodiment 1

[0032] In the negative electrode formula of the energy storage type Pb / C supercapacitor battery: under normal temperature and pressure, according to the components specified in Table 1, the modified high specific surface functionalized activated carbon material slurry: 96.7kg, lead powder: oxidized 500kg with a degree of 75±2%, deionized water: 55kg, sodium lignosulfonate: 2kg, carbon black: 1.5kg, barium stearate: 1.0kg, short fiber: 1.5kg, 1.25g / cm 3 Sulfuric acid 52kg mixture enters and stirs in the vertical paddle mixer. Preparation of negative electrode paste by dry blending method: add lead powder and short fiber to a vertical paddle stirring paste machine and stir for 10 minutes, then add high specific surface modified activated carbon material slurry and stir for 15 minutes, and then within 15 to 20 minutes Slowly add sulfuric acid into the paste mixing machine, then add deionized water, the time is controlled within 15 minutes, and then stir for 20 minutes to obtain t...

Embodiment 2

[0034] The method of Experimental Example 1 was repeated at the contents of each combination specified in Table 1 below, and the test results are listed in Table 1.

[0035] In the negative electrode formula of power type Pb / C supercapacitor (device) battery: lead powder with oxidation degree of 75±2%: 500kg, deionized water: 65kg, short fiber: 1.5kg, sodium lignosulfonate: 1.5kg, carbon black : 1.75kg, barium stearate: 1.0kg, short fiber: 1.5kg, 1.25g / cm 3 Sulfuric acid 65kg, acetylene black: 3kg, conductive graphite: 2kg. Preparation of negative electrode paste by dry mixing method: add lead powder, acetylene black, conductive graphite and short fibers to a vertical paddle stirring paste mixing machine and stir for 10 minutes, then slowly add sulfuric acid into the paste mixing machine within 10 minutes, and then Add deionized water, control the time within 15 minutes, and then stir for 15 minutes to obtain a power type Pb / C supercapacitor (device) battery negative electrod...

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Abstract

The invention provides a Pb / C supercapacitor battery cathode preparation method, and aims to provide a supercapacitor battery cathode preparation method which is high in active material utilization rate, good in power characteristic, small in leakage current, long in cycle life and excellent in pole piece electric energy storage and release performance. The method is implemented through the following technical scheme which comprises the steps of firstly adding 5%-15% of modified functionalized activated carbon material slurry with high specific surface area into a stirring tank, and stirring for 10-15min; then adding 50wt%-65wt% of cathode active material lead powder with the oxidation degree being 75%, 1wt%-5wt% of conductive agent and 1wt%-3wt% of addition agent into the stirring tank, and stirring for 5-10min; then adding 10wt% of deionized water, and stirring for 25-30min; and finally adding 10wt% of H2SO4 with the concentration being 6mol / L, and stirring for 20min so as to prepare energy storage type or a power type supercapacitor battery cathode material paste. The modified functionalized activated carbon material slurry with the high specific surface area is cleaned by HNO3, H3PO4 and a urea solution with the temperature being 90-100DEG C and loaded with part of metal compounds.

Description

technical field [0001] The invention relates to a preparation method of an energy storage device-a negative electrode of a supercapacitor battery integrating physical storage charge and chemical storage charge. Background technique [0002] The utilization rate of the active material of the negative electrode of the existing lead-acid battery is low, the electrode sheet has poor wettability to the electrolyte, serious dehydration, and the power density, energy density, service life, and charge storage capacity are much lower than those of the supercapacitor battery. Supercapacitor battery is a new type of energy storage device with high energy density and high power density. The advantages of both layer capacitors have become one of the research hotspots in recent years. At present, the research on supercapacitors mainly focuses on the preparation of high-performance electrode materials. Because of all the factors affecting the performance of chemical batteries, the perfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/34
CPCY02E60/13
Inventor 林彬吴孟强漆长席
Owner SICHUAN NEWBORN POWER MFG
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