Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5346929 | Applied Surface Science | 2017 | 19 Pages |
Abstract
Polydopamine and MnO2 core-shell composites (PDA@MnO2) for high-performance supercapacitors had been successfully synthesized by a facile and fast method. The morphology, crystalline phase and chemical composition of PDA@MnO2 composites are characterized using SEM, TEM, XRD, EDS and XPS. The performance of PDA@MnO2 composites are further investigated by cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy in 1Â M Na2SO4 electrolyte. The PDA@MnO2 core-shell nanostructure composites exhibit a high capacitance of 193Â FÂ gâ1 at the current density of 1A gâ1 and retained over 81.2% of its initial capacitance after 2500 cycles of charge-discharge at 2Â AÂ gâ1. The results manifest that the PDA@MnO2 composites can be potentially applied in supercapacitors.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Ding Hou, Haisheng Tao, Xuezhen Zhu, Maoguo Li,