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Updated: Dec 17, 2025

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
Novel Skutterudite CoP3 -Based Asymmetric Supercapacitor with Super High Energy Density
Jing Jiang1, Zhipeng Li1, Xinrui He1
1School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, P. R. China.
Abstract:
Skutterudite CoP3 holds a unique structural formation that exhibits much better electronic properties for obtaining high energy density supercapacitors. Herein, novel skutterudite Ni-CoP3 nanosheets are constructed by etching and coprecipitating at room temperature and subsequent low-temperature phosphorization reaction. Benefiting from the enhanced electrical conductivity and more electroactive sites brought about by adjusting the electronic structure with Ni incorporating the Ni-CoP3 electrode with a battery-type demonstrates an ultrahigh specific capacity of 0.7 mA h cm-2 and exceptional cycling stability. The asymmetric supercapacitor (ASC) device fabricated by employing Ni-CoP3 and activated carbon (AC) as positive and negative electrodes, resepectively, exhibits a remarkable high energy density of 89.6 Wh kg-1 at 796 W kg-1 and excellent stability of 93% after 10 000 cycles, due to the skutterudite structure. The skutterudite Ni-CoP3 shows a great potential to be an excellent next-generation electrode candidate for supercapacitors and other energy storage devices.
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