Seed polymerization and capacitive performances of polyaniline nanofibers

Zongyi Qin,M Popescu,Xian Xu,C.-W Chow

doi:10.1051/matecconf/202235601003

Abstract

Polyaniline (PANI) nanofibers have great potential application as a lightweight and high-performance pseudocapacitive material for supercapacitors. In this work, aniline oligomers as the seeds are produced in weak acidic solution of phosphoric acid through dilution polymerization, then these seeds were used to promote the grow of PANI nanofibers in the condition of hydrochloric strong acidic by adding more aniline monomers again. The microstructure and capacitance performances of PANI nanofibers were investigated by SEM, FT-IR, XRD and electrochemical measurements. When the current density is 1 A g-1, the specific capacitance could be as high as 442.9 F g-1. This work provides a route for the simple and efficient preparation of electrode materials with excellent performance.

Highlights

IntroductionThere has been increased focus on developing high-performance and lightweight electrodes for energy storage devices [1]
The aniline oligomers would be produced in weak acidic solution of phosphoric acid, and seed polymerization would be carried out in 1 M hydrochloric acid aqueous solution by adding more aniline monomers again to form highly conductive PANI nanofibers [6]
The aniline oligomers were prepared in weak acidic medium of phosphoric acid by using 0.05 M aniline for 0.5 h, and the PANI nanofibers were formed based on oligomers in 1 M hydrochloric acid solution by using 0.1 M aniline for 5.5 h

Summary

Introduction

There has been increased focus on developing high-performance and lightweight electrodes for energy storage devices [1]. PANI plays a big role among conductive polymers for flexible supercapacitor with high energy density due to its facile fabrication, reversible redox properties and ultra-high theoretical specific capacitance [2]. Among them, seed polymerization has been demonstrated to be one kind of highly efficient approaches for preparing high performance PANI nanofibers [3]. We prepared polyaniline nanofibers by seed polymerization. The aniline oligomers would be produced in weak acidic solution of phosphoric acid, and seed polymerization would be carried out in 1 M hydrochloric acid aqueous solution by adding more aniline monomers again to form highly conductive PANI nanofibers [6]. It is believed that as-prepared PANI nanofibers could prove its potential in energy storage materials

Experimental

Morphology and microstructure

Capacitance Performance

Conclusion