Hierarchically porous nickel oxide nanoflake arrays grown on carbon cloth by chemical bath deposition as superior flexible electrode for supercapacitors

• NiO nanoflake/carbon cloth electrode is prepared by chemical bath deposition.
• NiO nanoflake/carbon cloth electrode show high supercapacitor performance.
• Nanoflake arrays are favorable for high-rate capability due to porous structure.

Hierarchical porous NiO nanoflake arrays on carbon cloth are fabricated by a simple chemical bath deposition (CBD) method. Free-standing NiO nanoflakes with thicknesses of ~10 nm grow quasi-vertically to the carbon cloth forming an integrated flexible electrode. When evaluated as electrode materials for supercapacitors, such nanoflake array electrode exhibits electrochemical performances with high capacitance and desirable high-rate cycle life. The porous NiO nanoflake arrays on carbon cloth deliver a high specific capacitance of 660 F g−1 at 2 A g−1. In addition, the integrated flexible electrode exhibits excellent mechanical behavior and long-term cyclic stability (82% retention after 4000 cycles).

Carbon cloth supported NiO nanoflake arrays are prepared by chemical bath deposition and show good supercapacitor performance with high capacitances.Figure optionsDownload as PowerPoint slide