Synthesis of Mn3O4 nano-materials via CTAB/SDS vesicle templating for high performance supercapacitors

In this work, nano-structured Mn 3 O 4 particles with spongy-morphology were synthesized through vesicle templating, where hexadecyltrimethylammonium bromide (CTAB) and sodium dodecyl sulfate (SDS) were used as cationic-anionic surfactants. The Mn 3 O 4 electrode materials exhibited a high specific capacitance (451 F g −1 ) at a current density of 0.5 A g −1 in 1 mol L −1 Na 2 SO 4 electrolyte, and retained 333 F g −1 when the current density was increased to 5 A g −1 . Its capacitance retention is also high (up to 92%) after 10,000 cycles at a current density of 5 A g −1 .