A kind of aramid fiber electrode and preparation method thereof

Abstract

The invention discloses an aramid fiber electrode and a preparation method thereof. The preparation method of the aramid fiber electrode is to coat silver nanoparticles, carbon nanotubes, and polypyrrole on the surface of the aramid fiber in sequence by chemical bonding to prepare the aramid fiber electrode. Two bundles of aramid fiber electrodes can be wound with the electrolyte , to obtain an aramid fiber electrochemical capacitor. Compared with the polymer fiber electrochemical capacitor prepared in the prior art, the aramid fiber electrochemical capacitor provided by the present invention has high specific capacitance, high energy density, high mechanical performance, high stability, good flexibility and wearability and other characteristics; the preparation method is controllable and suitable for large-scale applications.

Description

technical field [0001] The invention relates to a fiber electrode, an electrochemical capacitor and a preparation method thereof, in particular to an aramid fiber electrode and a preparation method thereof. Background technique [0002] With the rapid development of wearable smart devices and the urgent need for sustainable energy, high-energy-density fiber electrochemical capacitors have shown great application prospects due to their small size, light weight, flexibility, high efficiency, and easy integration. Fiber electrochemical capacitors are composed of fiber electrodes and electrolytes in a parallel, wound, and coaxial structure, so their performance depends largely on the fiber electrode materials. In order to bring wearable fiber electrochemical capacitors from concept to application, it is urgent to develop high-performance fiber electrodes with good flexibility, wearability and excellent electrochemical performance. [0003] To date, a variety of fibers have been...

AI Technical Summary

Problems solved by technology

Although the capacitive material is coated, the polymer fiber does not contribute to the capacitive performance, so the specific capacitance of the polymer fiber electrode and the energy density of the capacitor are generally low

Second, the adhesion between the inorganic coating and the fiber matrix is ​​poor, and the coating may fall off after multiple deformations or electrochemical cycles, resulting in performance degradation, resulting in poor wearability of fiber capacitors.

Third, the mechanical properties of existing polymer fiber capacitors cannot meet the requirements

However, as with other polymer fiber capacitors, the capacitive performance of aramid fiber capacitors and the adhesion to inorganic coatings remain to be resolved.

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