Controllable synthesis of hierarchical nickel hydroxide nanotubes for high performance supercapacitors

Abstract

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.