MnO₂-based nanostructures for high-performance supercapacitors

Abstract

The recent progress, challenges and promising future on design, synthesis and fabrication of MnO2for supercapacitors are reviewed and discussed.

Urchin-like FeOOH hollow microspheres decorated with MnO2 for enhanced supercapacitor performance

“…One promising approach to improve their performance is to combine other metal oxides in a composite. Manganese dioxide (MnO 2 ) with favorable properties and high theoretical specific capacitance (1370 F g −1 ) makes it a promising electrode material in energy storage and conversion devices [26][27][28][29][30]. Furthermore, three-dimensional (3D) transitional metal oxides/ hydroxides nanostructures assembled from low-dimensional building blocks [31][32][33][34] exhibit enhanced properties compared to their bulk counterparts by offering a large specific surface area, high surface/body ratios, the enhanced permeability for the electrolyte ions, and rich electrochemically active sites [35].…”

Manganese dioxide core–shell nanostructure to achieve excellent cycling stability for asymmetric supercapacitor applications

“…[1][2][3][4] Electrochemical supercapacitors using MnO 2 as electrode materials have attracted signicant attention; this is due to the fact that they possess high theoretical capacitance, large electrode potential window, and are low-cost, non-toxic and environmentally benign in comparison to those using ruthenium oxides or other transition metal oxide electrodes.…”

Binder free 2D aligned efficient MnO2 micro flowers as stable electrodes for symmetric supercapacitor applications

“…3,6 Based on the charge storage mechanism, supercapacitors are classied into electrical double layer capacitors (EDLCs) and redox supercapacitors (pseudocapacitors). [7][8][9][10] In EDLCs, the capacitance comes from the charge separation at electrode/electrolyte interfaces 7,9 and in the case of pseudocapacitors, the capacitance arises from faradaic reaction at the electrode/electrolyte surface. 8,9 Recently, researchers have paid more attention towards pseudocapacitor because of the associated higher energy storage capacity compared to carbonbased electrodes (i.e.…”