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Modified carbon material and preparation method thereof, cathode lead paste, polar plate and lead carbon battery

A technology of lead-carbon battery and modified carbon, which is applied in the fields of modified carbon materials for lead-carbon batteries, pole plates and lead-carbon batteries, and negative electrode paste. It can solve the problem of adding capacitor materials to increase battery self-discharge and damage lead-acid batteries Charge and discharge capacity, increase in battery water consumption and other issues, to achieve the effect of enhancing charge acceptance, improving high rate charge and discharge capacity, and inhibiting hydrogen evolution

Inactive Publication Date: 2016-09-21
润高投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are also a series of problems that need to be solved in lead-carbon batteries: (1) The carbon material in the negative plate reduces the precipitation potential of hydrogen, and the precipitation of hydrogen increases the water consumption of the battery, damages the charge and discharge capacity of the lead-acid battery, and easily causes the battery to heat up. loss of control or dehydration
(2) The self-discharge is large, and the addition of capacitor materials increases the self-discharge of the battery
(3) In the carbon-doped lead-carbon battery, the carbon material will be gradually extruded from the plate by Pb during charging and discharging, and more carbon particles entering the electrolyte may cause a short circuit on the plate and damage the battery
(4) There is an oxygen cycle in valve-regulated lead-acid batteries, and oxygen diffused to the negative electrode may preferentially react with carbon to generate CO or CO 2 Precipitation, unable to recombine into water, thus reducing the oxygen cycle efficiency
Although the uniformity of carbon materials and lead powder has been improved, the process is complicated and the preparation efficiency is low

Method used

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  • Modified carbon material and preparation method thereof, cathode lead paste, polar plate and lead carbon battery

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preparation example Construction

[0037] In a preferred embodiment of the present invention, the preparation method of modified carbon material for lead-carbon battery comprises the following steps:

[0038] 1) The biomass material is placed in a pulverizer to pulverize, with an average particle size of 0.1-0.5cm;

[0039] 2) Treat the pulverized biomass material with an acid and / or alkali solution for 12 to 36 hours to remove impurities in the biomass material and filter to obtain a precursor;

[0040] The acid and alkali solutions include: sodium hydroxide, potassium hydroxide, sulfuric acid, nitric acid, and the concentration of the acid and alkali solutions is 0.1-2mol / L;

[0041] 3) Place the precursor in an aqueous solution containing a high hydrogen evolution overpotential metal salt, disperse it by ultrasonic vibration for 0.5-5 hours, stir for 0.5-5 hours, filter and wash with deionized water until the pH of the filtrate is about 7, and obtain a modified precursor;

[0042] The high hydrogen evolutio...

Embodiment 1

[0050] A preparation method for a modified carbon material for a lead-carbon battery, comprising the following steps:

[0051] 1) The rice husk is placed in a pulverizer to pulverize, with an average particle size of 0.1-0.5cm;

[0052] 2) Treat the pulverized rice husk with a 1mol / L sodium hydroxide solution for 24 hours to remove impurities in the rice husk, and filter to obtain the precursor;

[0053] 3) Place the precursor in an aqueous solution of lead nitrate containing 1mol / L, the mass ratio of lead nitrate to precursor is 0.5:1, disperse by ultrasonic vibration for 2 hours, stir for 2 hours, filter and wash with deionized water until the pH of the filtrate is about 7 , to obtain the modified precursor;

[0054] The ultrasonic vibration frequency is 30KHz, and the stirring rate is 1000r / min;

[0055] 4) The modified precursor is placed in a heating device, and the modified precursor is preheated, dried, carbonized and activated to obtain a modified carbon material; th...

Embodiment 2

[0060] A preparation method for a modified carbon material for a lead-carbon battery, comprising the following steps:

[0061] 1) Put lignin, corn cob and coconut shell in a pulverizer to pulverize, with an average particle size of 0.1-0.5cm;

[0062] 2) Treat the pulverized lignin, corn cob and coconut shell with 2mol / L potassium hydroxide solution for 12 hours, remove the impurities in lignin, corn cob and coconut shell, and filter to obtain the precursor;

[0063] 3) Place the precursor in an aqueous solution of lead chloride and zinc citrate with a total concentration of 5mol / L, the mass ratio of lead chloride and zinc citrate to the precursor is 2:1, disperse by ultrasonic vibration for 0.5h, and stir for 0.5 h, after filtering, wash with deionized water until the filtrate pH=7 or so to obtain a modified precursor;

[0064] The ultrasonic vibration frequency is 50KHz, and the stirring rate is 1800r / min;

[0065] 4) The modified precursor is placed in a heating device, a...

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Abstract

The invention relates to a modified carbon material and a preparation method thereof, cathode lead paste, a polar plate and a lead carbon battery. The preparation method comprises the steps of 1 crushing biologic material, wherein the biologic material is one or more of starch, lignin, corn cores, rice hull, ears, trees, shells, coconut shells, leaves and straw; 2, processing the crushed biologic material by inorganic strong acid and / or inorganic strong base solution, filtering and thereby obtaining a precursor; 3, placing the precursor into aqueous solution comprising high hydrogen evolution overpotential metal salt, dispersing by supersonic vibration and stirring for a period, filter, cleaning and thereby obtaining the modified precursor; and 4, processing the modified precursor to obtain the modified carbon material. According to the preparation method, the modified carbon material with uniform distribution and good combinability is prepared, the hydrogen evolution overpotential of the carbon material is improved, the high-power charging and discharging performance of the lead carbon battery is enhanced, and the life of the battery is prolonged.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a modified carbon material for a lead-carbon battery, a preparation method thereof, a negative electrode paste, a pole plate and a lead-carbon battery. Background technique [0002] Lead-acid battery is a kind of "resource recycling" energy product with high safety, stable electrical performance, low manufacturing cost, wide range of applications, and low-cost renewable utilization. It has always occupied a dominant position in the secondary battery market. With the development and utilization of new energy sources such as solar energy and wind energy and the rapid development of the new energy automobile industry, emerging markets have put forward higher and higher application requirements for batteries as energy storage devices, and lead-acid batteries are facing new development opportunities and more severe challenges. Only by actively developing new battery tech...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/38H01M4/14H01M4/20H01M10/06
CPCH01M4/14H01M4/20H01M4/38H01M4/62H01M4/625H01M4/628H01M10/06Y02E60/10
Inventor 黎朝晖蒋良兴张玘徐振轩胡林李建颖何亚玲方瑛
Owner 润高投资有限公司
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