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Updated: Jan 24, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
Transforming bioresources for high-efficiency energy storage: Utilizing porous carbon derived from reed in
Shan Zhong1, Shen Li1, Longyun Dai1
1School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, PR China.
Abstract:
By employing a sol-gel assisted self-assembly strategy to deconstruct the wood fiber structure in reed and subsequently combining it with zeolitic imidazolate framework (ZIF) topology, the in situ composite (N-RGel-ZT) was achieved at the molecular level, thereby producing a N/O co-doped porous carbon via two-step carbonization/activation processes. The results indicated that CN-RGel possessed an exceptional surface area of 3357 m2·g-1 and a gradational micro-/mesoporous structure featuring a micropore ratio of 56.6 %. This structure contributes to high pore utilization and creates nano-porosities that act as ion buffering reservoirs. CN-RGel exhibited uniform element distribution, with N and O contents of 3.11 at% and 8.58 at%, respectively. In a three-electrode electrochemical setup, the CN-RGel electrode demonstrated a remarkable capacitance of 408.8 F·g-1. When constructed into a dual electrode supercapacitor device utilizing ionic liquid electrolyte, it achieved an optimal energy density of 121.66 Wh·kg-1 and peak power density of 17,500 W·kg-1, in addition to good cycle durability of 95.76 % over 10,000 repetitions.
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