Composite of Strip-shaped ZIF-67 with Polypyrrole: A Conductive Polymer-MOF Electrode System for Stable and High Specific Capacitance

Sajid ur Rehman,¹ Rida Ahmed,² Kun Ma¹, Shuai Xu,¹ Tongxiang Tao,¹ Muhammad Adnan Aslam,¹ Muhammad Amir³ and Junfeng Wang^1,4*

¹CAS Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, 230031, P. R. China.

²School of Physics & Material Science, Anhui University, Hefei, 230601, P. R. China.

³Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Chinese Ministry of Education, School of Physics, Dalian University of Technology, Dalian, 116024, P. R. China.

⁴Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, P. R. China.

*Corresponding author email: junfeng@hmfl.ac.cn

 

Abstract

Strips like Zeolitic imidazolate framework-67 (SZIF-67) have been prepared by the wet chemical method and polypyrrole (PPy) has been deposited on the surface through the in-situ polymerization method and named as SZIF-67@PPy. The structure and morphology of prepared samples were observed by Scanning electron microscope (SEM), Transmission electron microscope (TEM), X-ray diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS). Further, the prepared samples (PPY, SZIF-67 and SZIF-67@PPy) were used as active electrode materials of supercapacitors. Compared with PPy and SZIF-67, the results show that SZIF-67@PPy has enhanced electrochemical performance, high-rate capability and good cycle stability. The results indicate that SZIF-67@PPy can become the next generation electrode materials for high-performance flexible supercapacitors.

 

Keywords: ZIF-67; polypyrrole; polymerization; electrode.