A kind of preparation method and application of sisal fiber carbon/lead composite material

Abstract

The invention discloses a preparation method and application of sisal fiber carbon / lead composite material. Utilize 5% sodium hydroxide and 5% phosphoric acid solution to carry out pretreatment to sisal fiber; Under 80 ℃, in constant temperature oil bath, fully impregnate the pretreated sisal fiber with lead chloride solution with magnetic stirring; sisal fibers impregnated with lead chloride, in N 2 Calcination was carried out under the atmosphere, controlled at 600 °C, and kept for 3 h to obtain sisal fiber carbon / lead composites. The sisal fiber carbon / lead composite material of the invention is applied to the negative electrode material of the lead-carbon battery. The present invention has the advantages of: adopting the solution impregnation method can make the active substance lead distribute more uniformly on the carbon material, have better interface description, improve the utilization rate of the active substance lead more effectively, and make the carbon material and Pb / PbSO 4 The working potential is more matched, thereby inhibiting the irreversible sulfation phenomenon of the negative electrode of the lead-carbon battery in the HRPSoC state, and prolonging the service life of the battery.

Description

technical field [0001] The invention belongs to the technical field of lead-carbon battery negative electrode materials, and in particular relates to a preparation method and application of a sisal fiber carbon / lead composite material. Background technique [0002] With the increasing demand for energy, the development and application research of advanced energy storage devices has become a hot spot. At present, electrochemical energy storage is mainly divided into several types such as lead-acid batteries, lithium-ion batteries, sodium-sulfur batteries, and flow batteries. At present, with the development of mobile equipment and hybrid energy vehicles, the requirements for electrochemical energy storage devices are getting higher and higher, and lead-acid batteries are the most common chemical batteries, which have the advantages of high cost performance, safety and reliability, and low cost. Both output value and sales account for more than 60% of chemical power sources. ...

AI Technical Summary

Problems solved by technology

However, there are also some problems in the development of lead-carbon batteries. For example, in most cases, people simply mix the carbon materials with the active materials in the negative electrode materials, hydrogen evolution inhibitors, binders and other substances. Mechanically stir in the water and sulfuric acid solution, and then obtain the lead paste, which is coated on the lead-calcium alloy grid, and then the negative plate is obtained through the processes of acid leaching, curing, drying, and chemical formation.

However, due to the low density of carbon additives, there is a certain difference from the density of negative electrode material additives, especially the density difference from lead powder, so simple mechanical mixing makes the carbon material in the lead paste and the negative electrode active material. There is an interface Incompatibility, which will increase the interfacial ohmic resistance, leading to the possibility of interruption when the battery runs for a long time in the HRPSoC state, and finally affects the conductivity of the negative active material

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