Preparation method of carbon material for cathode of lead-acid storage battery

A lead-acid battery, carbon material technology, applied in lead-acid batteries, battery electrodes, chemical instruments and methods, etc., can solve problems such as sulfation and limit battery cycle life, and achieve the effect of improving bonding and prolonging cycle life.

Inactive Publication Date: 2015-11-04
SOUTH CHINA NORMAL UNIVERSITY
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Problems solved by technology

[0003] In the prior art, no matter in the electric vehicle or the intermittent energy storage system, the lead-acid battery is in a partially charged state, and has to go through the charge and discharge process under the high rate partial charge state. In this state, the traditional The lead-acid battery will quickly undergo sulfation on the surface of the negative plate, which limits the cycle life of the battery

Method used

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  • Preparation method of carbon material for cathode of lead-acid storage battery
  • Preparation method of carbon material for cathode of lead-acid storage battery

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Embodiment 1

[0026] Example 1. Weigh 10g of activated carbon with a particle size of 2-4μm in a 300mL Erlenmeyer flask, add 200mL of deionized water, shake at 80°C for 120min, then filter while hot, and dry in a vacuum oven at 80°C 10 hours.

[0027] Weigh 2 g of activated carbon, add it into the lead nitrate solution, shake for 90 minutes at pH = 4.0, room temperature, and rotational speed 200 r / min.

[0028] The obtained lead-carbon composite material was filtered and dried in a vacuum oven at 80° C. for 8 hours.

[0029] The proportion of lead in the obtained lead-carbon composite material is 5% by weight. Electronic scanning of the prepared carbon material shows that lead particles grow out of the gaps of the activated carbon particles or cover the surface of the activated carbon. The specific capacitance of this carbon material was 93.7 F / g.

[0030] Embodiment 2-4, three kinds of activated carbon materials with the particle diameters of the activated carbon weighed in 1-2 μm and 4-...

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Abstract

The invention discloses a preparation method of a carbon material for a cathode of a lead-acid storage battery. The preparation method comprises the following steps of: weighing a certain amount of activated carbon material with different grain diameters; placing the activated carbon material in deionized water; vibrating for 60 to 120 minutes at a rotational speed of 100-300 r / min and a condition of 70-100 DEG C; filtering, placing in a vacuum drying oven with 50-90 DEG C and drying for 6 to 12 hours to obtain dried activated carbon; placing the dried activated carbon in a certain volume of solvent; vibrating for 80 to 140 minutes at the rotational speed of 100-300 r / min and a condition of 20-50 DEG C; and filtering a product after reaction, placing the product in the vacuum drying oven with 50-90 DEG C, and drying the product for 8 to 12 hours to obtain the carbon material for the cathode of the lead-acid storage battery. By the carbon material, the binding between the carbon material and an active substance and the dispersion of the carbon material in the active substance can be improved, and thus, the cycle life of the lead-acid storage battery at partial state of high-rate charge is prolonged.

Description

technical field [0001] The invention relates to the technical field of lead-acid storage batteries, in particular to a method for preparing a carbon material for negative electrodes of lead-acid storage batteries. Background technique [0002] Lead-acid batteries have played a pivotal role in the progress of mankind and the development of industry in its 150 years of development. However, with the aggravation of environmental pollution and energy crisis, and the urgent need for environmental protection, lead-acid batteries are facing new technical challenges. However, lead-acid batteries have been It plays an important role in the battery industry. [0003] In the prior art, no matter in the electric vehicle or the intermittent energy storage system, the lead-acid battery is in a partially charged state, and has to go through the charge and discharge process under the high rate partial charge state. In this state, the traditional The surface of the lead-acid battery will r...

Claims

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Application Information

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IPC IPC(8): H01M4/62C01B31/08H01M10/06
CPCC01B32/354H01M4/625H01M4/628H01M10/06Y02E60/10
Inventor 高爱梅仝鹏阳黄婵陈飞方明学陈红雨
Owner SOUTH CHINA NORMAL UNIVERSITY
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