Structural and electrochemical properties of MnO2-Carbon based supercapacitor electrodes

TL;DR

This study explores how manganese oxide can be integrated into carbon xerogels to enhance supercapacitor electrodes, focusing on structural optimization for improved electrochemical performance.

Contribution

It introduces a method for incorporating manganese oxide into carbon xerogels and identifies optimal structural parameters for high-performance supercapacitor electrodes.

Findings

External surface deposition of manganese oxide on carbon xerogels.

Optimal pore and particle sizes range from 10 to 20 nm.

Long deposition times and low precursor concentrations improve capacitance.

Abstract

We present results of an approach to incorporate redox-active manganese oxide into the 3-dimensional porous structure of carbon xerogels under self-limiting electroless conditions. By varying the structure of the carbon backbone, we found that deposition of manganese oxide preferably takes place on the external surface area of the carbon xerogels. From our detailed analysis we conclude that 3-dimensional carbon xerogels with particle and pore sizes ranging from 10 to 20 nm and low manganese oxide precursor concentration combined with long deposition times are beneficial for fast operating pseudocapacitance electrodes with high capacitance and effective use of the redox active component.