A kind of double carbon cloth flexible lithium-sulfur battery and its preparation method

Abstract

A double-carbon cloth flexible lithium-sulfur battery and a preparation method thereof belong to the technical field of lithium-sulfur battery preparation. The lithium-sulfur battery is composed of a flexible positive electrode, a flexible negative electrode, a PP separator, an electrolyte, and an aluminum-plastic film; during the preparation process, both the positive electrode and the negative electrode use commercial flexible carbon cloth as a carrier. Using carbon cloth as the positive electrode carrier can effectively solve the conductivity problem of elemental sulfur and avoid the problem that the electrode active material falls off after the electrode prepared by the traditional coating method is bent. The use of carbon cloth as the negative electrode carrier, on the one hand, effectively improves the flexibility of the lithium metal negative electrode; on the other hand, the carbon cloth, as a three-dimensional conductive framework, can effectively disperse the current so that the metal lithium can be uniformly dissolved in the charging and discharging process. and deposition to inhibit the growth of dendrites, thereby improving the life of the battery. The present invention prepares CC@Co / CNTs material for the first time, which has higher specific surface area and conductivity than carbon cloth raw materials.

Description

technical field The invention belongs to the technical field of lithium-sulfur battery preparation, and in particular relates to a double-carbon cloth flexible lithium-sulfur battery and a preparation method thereof. Background technique With the development of portable electronic products, people's requirements for flexible batteries are becoming more and more urgent. As one of the most critical components of electronic products, the energy density and reliability of flexible batteries directly determine the performance of portable electronic products. In the current commercial battery system, lithium-ion batteries are energy storage devices with high energy density. Although there have been researches on the flexibility of lithium-ion batteries, the positive and negative materials of lithium-ion batteries are mainly based on intercalation and desorption. Insertion reaction, the mass specific energy is low, which is not conducive to the thinning and lightening of portable ...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to solve the problem that elemental sulfur is non-conductive and the traditional coating method is difficult to realize flexible electrodes, and to provide a double carbon cloth flexible lithium-sulfur battery and its preparation method. In the preparation process, both the positive and negative electrodes use commercial flexible carbon cloth as carrier

Using carbon cloth as the positive electrode carrier can effectively solve the conductivity problem of elemental sulfur and avoid the problem that the electrode active material falls off after the electrode prepared by the traditional coating method is bent.

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