Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6602412 | Electrochimica Acta | 2018 | 33 Pages |
Abstract
Manganese dioxide (MnO2) is an ideal electrode material for supercapacitors due to its low cost and large theoretical specific capacity. We reported the hydrothermal synthesis MnO2 nanostructures with different morphologies through the variation of hydrothermal temperature and dwell time. It was found that cauliflower-like δ-MnO2 particles are prepared at a lower temperature while the needle-like α-MnO2 nanorods are formed at a higher temperature. The morphologies of MnO2 were also affected by the hydrothermal dwell time. The needle-like α-MnO2 nanorods have the higher specific surface (114â¯m2â¯gâ1) than that of the cauliflower-like δ-MnO2 particles. Electrochemical properties were evaluated using cyclic voltammetry (CV) and galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS). The hierarchical multidimensional MnO2 architecture nanostructured surface with particles and nanorods, shows a maximum specific capacity (311.52â¯Fâ¯g-1â¯at 0.3â¯Aâ¯gâ1). These results provided a generic guideline in developing different nanostructured electrode materials for electrochemical energy storage.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Xianlin Bai, Xinglin Tong, Yanli Gao, Wanqing Zhu, Can Fu, Jingyao Ma, Tianci Tan, Chunlei Wang, Yongsong Luo, Haibin Sun,