Facile synthesis of porous Mn2O3 nanocubics for high-rate supercapacitors

•Well-crystallized porous Mn2O3 nanocubics were prepared by a facial hydrothermal method followed with calcination.•The nanocubics as electrode material showed a high specific capacitance of 191.1 F g−1 and a high-rate supercapacitor performance, i.e., 58.6% retention even when the current density is increased 50 times.•The nanocubics as electrode material showed a good cycling stability (108% of the initial capacitance after 3000 cycles).

Porous Mn2O3 nanocubics, which were synthesized by a facile hydrothermal route followed by a calcination process, exhibited a specific capacitance of 191.1 F g−1 and a high rate capability with 58.6% specific capacitance retention even when the current density is increased by 50 times, and an excellent long-term cycle stability, and the fabricated simple symmetric supercapacitor was also fabricated and showed a good electrochemical performance, thus could be considered as a potential material for high-rate supercapacitors in some special applications that do not require a high capacitance.

Graphical abstractPorous Mn2O3 nanocubic was synthesized by a facile route and exhibited a specific capacitance of 191.1 F g−1 and a high rate capability with 58.6% specific capacitance retention even when the current density is increased by 50 times and excellent long-term cycle stability, which could be considered as a potential material for high-rate supercapacitors.Figure optionsDownload full-size imageDownload as PowerPoint slide