A kind of preparation method of composite cotton fabric electrode for flexible supercapacitor

Abstract

The invention relates to a method for preparing a composite cotton fabric electrode for a flexible supercapacitor. Cotton fabric is steeped into a disperse solution with negative and positive iron mixed surfactants, carbon nano tubes and organic monomers, after ultrasonic treatment is conducted on the solution, an oxidizing agent solution are added to the solution in a dripping mode, the solution is mixed at the same time, and the mixed solution is placed in an ice-water bath to react. According to the method for preparing the composite cotton fabric electrode for the flexible supercapacitor, a one-step and one-bath method is adopted, the surfactants serve as a soft template, the carbon nano tubes serve as a hard template, and the composite cotton fabric electrode of a three-dimensional net-shaped structure is constructed in an in-situ mode. The method for preparing the composite cotton fabric electrode for the flexible supercapacitor is simple in technology, the composite cotton fabric electrode can be directly applied to natural fibers, a prepared composite material has the high specific capacitance and the stable cycle performance, and the method has good application and development prospects in the aspect of portable and foldable flexible electronic and energy devices.

Description

technical field [0001] The invention belongs to the field of preparation of flexible electrode materials, in particular to a preparation method of a composite cotton fabric electrode for a flexible supercapacitor. Background technique [0002] Supercapacitor is a new type of energy storage device between traditional capacitors and batteries. It has the characteristics of both ordinary capacitors and batteries. The electrode material is the key factor determining the performance of supercapacitors. At present, the research on supercapacitors mainly focuses on the development of high-performance porous electrode materials and their structure and performance modulation. The preparation of electrodes with materials with porous structures as carriers is one of the important shortcuts to improve the specific capacity of electrode materials. A well-designed support skeleton is too costly for practical application. Therefore, it has also become a research object to find relatively ...

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Problems solved by technology

However, this material has problems such as short life and poor cycle stability. Usually, conductive polymers are used in combination with other inorganic nanoparticles (such as carbon materials, transition metal oxides), and the composite materials prepared in this way have large capacitance and high energy density. , high output power

The traditional method is to add a polymer binder to the mixture of inorganic nanoparticles and conductive polymers to coat the surface of the fabric. The addition of the polymer binder causes the overall resistance of the electrode to increase, and the porous structure of the carrier is easy to lose. The porous material in the solution The wetting performance in the medium decreases, and even the aggregation structure of the electrode material becomes more complicated, and the uncertain factors increase.

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