화학공학소재연구정보센터
Electrochimica Acta, Vol.283, 1789-1797, 2018
Cotton yarns modified with three-dimensional metallic Ni conductive network and pseudocapacitive Co-Ni layered double hydroxide nanosheet array as electrode materials for flexible yarn supercapacitors
A novel cotton/Ni/Co-Ni layered double hydroxide (CT/Ni/Co-Ni LDH) hybrid yarn electrode material is prepared by constructing a three-dimensional (3D) metallic Ni conductive network on the cotton fiber surface for rapid electron transportation and subsequently in situ growing Co-Ni LDH nanosheet array layers with high electroactive surface area for faradic reactions. The 3D porous electrode structure facilitates the effective electrolyte ion diffusion. The obtained yarn electrode material shows a high areal capacitance of 1.26 F/cm(2) (121571.1 C/cm(2)) at a scan rate of 5 mV/s, as well as a stable electrochemical performance under various mechanical deformations. An all-solid-state yarn supercapacitor device is further assembled based on the obtained yarn electrode materials, which exhibits a high energy density of 9.3 mu Wh/cm(2) at a power density of 43.99 mu W/cm(2). (C) 2018 Elsevier Ltd. All rights reserved.