Ni(OH)2/CNTs hierarchical spheres for a foldable all-solid-state supercapacitor with high specific energy†
Abstract
Energy density and mechanical strength are crucial for practical usage of flexible supercapacitors. Herein, we demonstrate a flexible supercapacitor using Ni(OH)2/CNTs hierarchical spheres with high specific capacity (854 C g−1) and tough PBI-KOH solid polymer electrolyte. The integrated device shows high specific energy (50.6 W h kg−1) and good flexibility under folding tests.