Boosting the Electrical Transfer by Molybdenum Doping for Robust and Flexible NiSe-Based Supercapacitor

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Nickel Selenide (NiSe) is a potential electrode material for supercapacitors but suffers from poor stability and limited capacity.
• Challenges include sensitivity to electrolyte anions and unstable cycling performance.

Purpose of the Study:

• To improve the electrochemical performance of NiSe for supercapacitor applications.
• To investigate the effects of Molybdenum (Mo) doping on NiSe properties.

Main Methods:

• Hydrothermal synthesis was used to prepare Mo-doped NiSe.
• Electrochemical performance was evaluated using techniques like cyclic voltammetry and galvanostatic charge-discharge.
• Theoretical calculations were performed to understand the doping mechanism.

Main Results:

• Mo-doped NiSe exhibited a high specific capacity of 799.90 C g^-1.
• Enhanced rate performance and excellent cyclic stability with 90% capacity retention were observed.
• Mo doping reduced the band gap, improved electrical conductivity, and enhanced adsorption energy.

Conclusions:

• Molybdenum doping significantly enhances the electrochemical properties of NiSe for supercapacitors.
• A flexible Mo-doped NiSe-based supercapacitor demonstrated practical application potential, powering electronic devices.