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Updated: Feb 25, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
Asymmetric supercapacitors with high energy density based on helical hierarchical porous Na MnO2 and MoO2
Xue-Feng Lu1, Zhi-Xiang Huang1, Ye-Xiang Tong1
1MOE Laboratory of Bioinorganic and Synthetic Chemistry , KLGHEI of Environment and Energy Chemistry , School of Chemistry and Chemical Engineering , Sun Yat-sen University , Guangzhou 510275 , China .
Abstract:
Helical hierarchical porous Na MnO2/CC and MoO2/CC, which are assembled from nanosheets and nanoparticles, respectively, are fabricated using a simple electrodeposition method. These unique helical porous structures enable electrodes to have a high capacitance and an outstanding cycling performance. Based on the helical Na MnO2/CC as the positive electrodes and helical MoO2/CC as the negative electrodes, high performance Na MnO2/CC//MoO2/CC asymmetric supercapacitors (ASCs) are successfully assembled, and they achieve a maximum volume Csp of 2.04 F cm-3 and a maximum energy density of 0.92 mW h cm-3 for the whole device and an excellent cycling stability with 97.22% Csp retention after 6000 cycles.
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