Potential of MnO₂‐based composite and numerous morphological for enhancing supercapacitors performance

Abstract

The development of materials and electrochemical energy storage (EES) technologies are currently taking the lead and showing excellent performance in the global effort to tackle the issues of sustainable energy supply. Supercapacitors have been widely studied among the EES technologies as they exhibit quick charging rates under high‐power conditions. Manganese dioxide (MnO2) has attracted renewed interest as a promising material due to its high theoretical capacitance and high energy density. However, the widespread application is immediately impacted by low conductivity. Hence, combining nanomaterials and various morphologies of MnO2 can improve the electrochemical performance of supercapacitors. This paper presents a review based on the composites of nanomaterials/MnO2 with various morphologies. Their mechanism and practical applications in supercapacitors are introduced in detail. Finally, the challenges and next steps in developing MnO2 electrode materials are proposed.

MnO2 Nanorods on Mesoporous Carbon as a Bifunctional Electrocatalyst for Hydrazine Oxidation and Oxygen Reduction Reactions in Alkaline Media

“…However, the low conductivity of MnO 2 restricts its functional performance. 44 Herein, we prepared a MnO 2 /C nanocomposite to investigate its unique morphology and crystallographic form for bifunctional electrochemical activity (HzOR and ORR) in an alkaline medium. We introduced a highly conductive mesoporous carbon CKT to resolve the drawbacks of the low conductivity and proper electron transfer pathway of pure MnO2.…”

“…MnO 2 is regarded as a potential material for ORR and HzOR due to advantages such as being economical and environmentally friendly, morphological tunability, and variable valence. However, the low conductivity of MnO 2 restricts its functional performance . Herein, we prepared a MnO 2 /C nanocomposite to investigate its unique morphology and crystallographic form for bifunctional electrochemical activity (HzOR and ORR) in an alkaline medium.…”