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Preparation method of ternary composite material for lead-carbon battery

A composite material and lead-carbon battery technology, which is applied in lead-acid batteries, electrical components, battery electrodes, etc., can solve the problems of graphene materials such as lower specific surface and electrical conductivity, low electrical conductivity, and easy agglomeration, so as to improve electrical conductivity Lower, lower interface resistance, solve the effect of serious agglomeration

Inactive Publication Date: 2017-02-15
SHUANGDENG GRP
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Problems solved by technology

But such a preparation process, on the one hand, due to the huge surface energy of graphene, it is easy to agglomerate, and even return to the state of graphite, which will inevitably reduce the specific surface and conductivity of graphene materials; on the other hand, activated carbon Although the fiber has a large specific surface area, its electrical conductivity is low. Therefore, constructing a graphene / activated carbon fiber composite material and effectively realizing the synergistic effect of the two

Method used

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  • Preparation method of ternary composite material for lead-carbon battery
  • Preparation method of ternary composite material for lead-carbon battery

Examples

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Embodiment 1

[0018] Put 3g palm fiber into a 500mL Erlenmeyer flask, add 1g graphene oxide, then add 30g / L NaOH solution 400mL, at 25°C, ultrasonic treatment for 15min, then stir at 190r / min for 5h, place in Brookfield Filter in a funnel. The filtered adsorbent material was dried in a vacuum drying oven at 65 °C for 6 h, taken out, and cooled to room temperature in a desiccator to obtain graphene oxide-modified palm fiber.

[0019] Take 2g of the above-mentioned modified palm fiber and put it into a 500mL Erlenmeyer flask, add 300mL of lead nitrate solution with a concentration of 18g / L, squeeze the lid tightly, seal it with parafilm, and shake it at 190r / min for 8h at 25°C. The solid reaction product was filtered and dried under vacuum at 60 °C for 12 hours to obtain graphene oxide / biomass fibers with Pb adsorbed on the surface.

[0020] The above-mentioned biomass fibers were calcined at 800° C. for 2 hours under the protection of nitrogen, and cooled naturally to room temperature to ob...

Embodiment 2

[0022] The difference between this example and Example 1 is that sisal fiber is used as the raw material of biomass fiber, the soluble lead salt is lead chloride, and the rest are the same as Example 1.

[0023] According to the lead paste formula of positive plate: lead powder 10g, sulfuric acid 1.2g, water 1.4g, short fiber 0.02g, red lead 0.8g; negative electrode lead paste formula: lead powder 10g, sulfuric acid 1.1g, water 1.2g, short fiber 0.02 g, barium sulfate 0.2g sodium lignosulfonate 0.02g for mixing paste, the apparent density of the lead paste is controlled at 4.20g / cm 3 , and then apply the obtained lead paste on the grid to obtain positive and negative plates without activated carbon fiber.

[0024] On the basis of the above-mentioned lead paste formula, the lead / graphene / activated carbon fiber ternary composite material prepared in Example 1 was added as an additive in an amount of 0.01 g for the positive electrode and 0.02 g for the negative electrode, and the...

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Abstract

The invention relates to a preparation method of a ternary composite material for a lead-carbon battery. The preparation method comprises the following steps: performing purification treatment on biomass fibers and graphene oxide by using a NaOH solution to ensure that sufficient graphene oxide is loaded on surfaces of the biomass fibers; and then performing high-temperature carbonization after chemical adsorption of Pb ions to obtain a lead / graphene / activated carbon fiber ternary composite material. According to the method provided by the invention, the adopted biomass fibers are wide in source, the preparation process is economical and environment-friendly, the prepared lead / graphene / activated carbon fiber ternary composite material not only can solve the problem of low electric conductivity of activated carbon by virtue of graphene, but also effectively solves the problem of serious agglomeration of graphene. Meanwhile, a layer of nano-scale lead oxide covers uniformly on the surface of a carbon material, so that on one hand, the over-potential of hydrogen evolution of the carbon material is improved, and on the other hand, the compatibility between the carbon material and lead powder is improved, and the interface resistance is reduced. The ternary composite material is used for making the lead-carbon battery, and the cycle life of the battery is prolonged.

Description

technical field [0001] The invention relates to a preparation method of a ternary composite material for a lead-carbon battery, belonging to the technical field of lead-carbon battery production. Background technique [0002] Developing new energy vehicles and non-fossil energy, protecting the global environment, and reducing carbon dioxide emissions have become the consensus of all countries in the world. In the utilization of new energy vehicles and solar and wind energy, power batteries and energy storage batteries have become one of the key constraints. Lead-acid battery has a history of 150 years. Due to its mature technology, stable performance, high safety and low price, it has been widely used in transportation, electric power, communication, national defense, railway and other fields. The vast power and The energy storage market has put forward new requirements and challenges for lead-acid battery technology. [0003] By incorporating high specific surface carbon m...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/57H01M4/62H01M10/06
CPCH01M4/364H01M4/57H01M4/625H01M10/06Y02E60/10
Inventor 张海南杨宝峰楼志强
Owner SHUANGDENG GRP
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