An in-plane supercapacitor obtained by facile template method with high performance Mn-Co sulfide-based oxide...

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Designing in-plane supercapacitors requires high electrode material selectivity for improved electrochemical performance.
• Current methods may limit the choice of active materials for supercapacitor electrodes.

Purpose of the Study:

• To develop a facile template method for fabricating in-plane supercapacitors with enhanced electrode material selectivity.
• To investigate the electrochemical performance of a symmetrical in-plane supercapacitor (SPS) using Mn-Co LDO-2S as the electrode material.

Main Methods:

• A template method was employed to fabricate in-plane supercapacitors, allowing for the selection of diverse electrochemical active materials.
• Mn-Co LDO-2S, featuring optimized metal-sulfur bonds and sulfur vacancies, was synthesized and utilized as the electrode material for the SPS.

Main Results:

• The developed template method demonstrated the ability to select any electrochemical active material for in-plane supercapacitors.
• The SPS utilizing Mn-Co LDO-2S achieved a notable area energy density of 55.0 μWh cm⁻² and an area power density of 0.7 mW cm⁻².
• The introduction of sulfur atoms and sulfur vacancies proved effective in enhancing electrode material performance.

Conclusions:

• The proposed template method offers a promising approach to broaden the material selection for in-plane supercapacitors.
• Optimizing sulfur content and vacancies in electrode materials is a viable strategy for improving supercapacitor electrochemical performance.