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Updated: Jan 26, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
Paper Electrodes Coated with Partially-Exfoliated Graphite and Polypyrrole for High-Performance Flexible
Leping Huang1, Weida Rao2, Lingling Fan3
1State Key Laboratory for Hubei New Textile Materials and Advanced Processing Technology, School of Materials Science & Engineering, Wuhan Textile University, Wuhan 430200, China. hlp71@126.com.
Abstract:
Flexible paper electrodes for supercapacitors were prepared with partially-exfoliated graphite and polypyrrole as the active materials. Graphite was coated on paper with pencil drawing and then electrochemically exfoliated using the cyclic voltammetry (CV) technique to obtain the exfoliated graphite (EG)-coated paper (EG-paper). Polypyrrole (PPy) doped with β-naphthalene sulfonate anions was deposited on EG-paper through in-situ polymerization, leading to the formation of PPy-EG-paper. The as-prepared PPy-EG-paper showed a high electrical conductivity of 10.0 S·cm-1 and could be directly used as supercapacitor electrodes. The PPy-EG-paper electrodes gave a remarkably larger specific capacitance of 2148 F∙g-1 at a current density of 0.8 mA∙cm-2, compared to PPy-graphite-paper (848 F∙g-1). The capacitance value of PPy-EG-paper could be preserved by 80.4% after 1000 charge/discharge cycles. In addition, the PPy-EG-paper electrodes demonstrated a good rate capability and a high energy density of 110.3 Wh∙kg-1 at a power density of 121.9 W∙kg-1. This work will pave the way for the discovery of efficient paper-based electrode materials.
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