Controllable synthesis of hierarchical nickel hydroxide nanotubes for high performance supercapacitors

Hierarchical Ni(OH)2 nanotubes with ultrathin nanoflakes were successfully synthesized by a self-sacrificial template via a facile solvothermal method. The as-prepared Ni(OH)2 nanotubes exhibit a high specific capacitance of 1319 F g-1 at 3 A g-1, and retain 700 F g-1 (79.3% of the initial capacitance) at 5 A g-1 after 7000 cycles.