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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.
Novel nickel-cobalt phosphide (Ni-CoP3) nanosheets offer superior performance for high energy density supercapacitors. This advanced material demonstrates exceptional capacity and stability, paving the way for next-generation energy storage solutions.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Skutterudite cobalt phosphide (CoP3) possesses unique structural properties beneficial for high energy density supercapacitors.
- Enhancing electronic properties is key to improving supercapacitor performance.
Purpose of the Study:
- To synthesize novel skutterudite nickel-cobalt phosphide (Ni-CoP3) nanosheets.
- To evaluate the electrochemical performance of Ni-CoP3 as an electrode material for supercapacitors.
Main Methods:
- Synthesis of Ni-CoP3 nanosheets via room-temperature etching and coprecipitation, followed by low-temperature phosphorization.
- Fabrication of an asymmetric supercapacitor (ASC) device using Ni-CoP3 and activated carbon (AC) electrodes.
Main Results:
- The Ni-CoP3 electrode exhibited an ultrahigh specific capacity of 0.7 mA h cm-2.
- The ASC device achieved a high energy density of 89.6 Wh kg-1 at 796 W kg-1.
- The device demonstrated excellent cycling stability, retaining 93% capacity after 10,000 cycles.
Conclusions:
- Skutterudite Ni-CoP3 nanosheets show great potential as next-generation electrode materials for supercapacitors.
- The incorporation of Ni enhances electrical conductivity and electroactive sites, improving device performance.
- The unique skutterudite structure contributes to the exceptional energy density and stability observed.
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