Facile growth of hexagonal NiO nanoplatelet arrays assembled by mesoporous nanosheets on Ni foam towards high-performance electrochemical capacitors

• DOI: 10.1016/j.electacta.2012.06.044
• Publication Date: 2012-06-23T02:10:36Z
• Authors: Changzhou Yuan; Jiaoyang Li; Linrui Hou; Long Yang; Laifa Shen; Xiaogang Zhang
• Keywords: Non-blocking I/O; Nickel oxide

Abstract In the work, we develop a novel two-step strategy to synthesize self-supported hexagonal nickel oxide nanoplatelet arrays on Ni foam: precipitating hydroxides followed by calcinating process. These nanoplatelets are composed of a multilayer of ultrathin mesoporous NiO nanosheets. The unique Ni foam-supported mesoporous NiO nanoplatelet arrays electrode promises fast ion and electron transport, large electroactive surface area, and excellent structural stability. As a result, superior pseudocapacitive performance is achieved with large specific capacitance in the range of 1124–864 F g−1 and excellent cycling stability up to 5000 cycles, suggesting their promising application for electrochemical capacitors.