Co(OH)F nanorods@K MnO2 nanosheet core-shell structured arrays for pseudocapacitor application.
Si Chen1, Yi Song2, Xuejiao Zhou1
1Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University Harbin 150025 PR China zhangmingyi@hrbnu.edu.cn mysci@foxmail.com.
RSC Advances
|May 11, 2022
Summary
A novel Co(OH)F nanorods@K MnO2 nanosheet core-shell nanostructure was developed for high-performance pseudocapacitors. This material demonstrates excellent capacitance and stability, showing great potential for electrochemical energy storage applications.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Developing advanced electrode materials is crucial for enhancing electrochemical capacitor performance.
- Core-shell nanostructures offer unique advantages for energy storage due to their high surface area and synergistic effects.
Purpose of the Study:
- To synthesize and characterize a novel Co(OH)F nanorods@K MnO2 nanosheet core-shell nanostructure.
- To evaluate the electrochemical properties of the developed nanostructure for pseudocapacitor applications.
Main Methods:
- Facile hydrothermal method for assembling Co(OH)F nanorods@K MnO2 nanosheet core-shell nanostructure on Ni foam.
- Electrodeposition process to incorporate the nanostructure.
- Electrochemical testing to assess capacitance, rate capability, and cycling stability.
Main Results:
- Achieved a high areal capacitance of 1046 mF cm⁻² at 1 mA cm⁻².
- Demonstrated remarkable specific capacitance retention of 118% after 3000 cycles.
- Exhibited a capacitance of 821 mF cm⁻² at 10 mA cm⁻², indicating good rate capability.
Conclusions:
- The Co(OH)F nanorods@K MnO2 nanosheet core-shell nanostructure is a promising electrode material for pseudocapacitors.
- The core-shell architecture and heterogeneous nanocomposite design contribute to excellent electrochemical performance.
- The material shows wide application potential in the field of electrochemical capacitors.
More Related Videos
Related Concept Videos
01:18Capacitor With A Dielectric
4.2K
Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
4.2K
01:25MOS Capacitor
1.0K
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
1.0K