Supercapacitor Performance Using <scp>ZIF</scp>‐L@<scp>PIM</scp>‐1‐Derived <scp>ZnO</scp>@N‐Doped Carbon Electrodes
Hani Nasser Abdelhamid, Mervat Ibrahim, Mohamed Yahia
Abstract
ABSTRACT This investigation reported the utilization of a composite polymer of intrinsic microporous (PIM‐1) with leaf‐like zeolitic imidazolate frameworks (ZIF‐L) as electroactive materials for supercapacitors. Furthermore, ZIF‐L@PIM‐1 was utilized as the precursor for synthesizing ZnO@nitrogen‐doped carbon materials. The synthesis process involved carbonization at temperatures ranging from 400°C to 700°C. The materials were used to prepare anode and cathode electrodes, utilizing nickel foam (NF) as an electron collector. The electrochemical investigations, employing cyclic voltammetry (CV) and galvanostatic charge–discharge curves (GCDC), revealed the high performance of the produced materials as electrode materials in both negative and positive modes. The study's findings indicate that the negative and positive electrodes exhibited specific capacitances of 240 and 272.4 F/g, respectively, at a current density of 0.5 A/g. The electrochemical impedance spectroscopy (EIS) using Nyquist plots facilitated the analysis of the impact of ZIF‐L on the conductivity of PIM‐1. This investigation revealed that incorporating ZIF‐L led to a notable enhancement in the electrochemical capacitance of PIM‐1.