Hierarchical NiCo2S4@Nickel–Cobalt Layered Double Hydroxide Nanotube Arrays on Metallic Cotton Yarns for Flexible Supercapacitors

Constructing high capacitance active materials and three-dimensional (3D) conductive networks inside textile yarn frames is a promising strategy to synthesize yarn supercapacitor electrodes. In this study, growing NiCo2S4@Ni–Co layered double hydroxide (LDH) nanotube arrays on Au-metalized cotton ya...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2019-08, Vol.11 (33), p.30384-30390
Main Authors: Wang, Yi-Fan, Wang, Hai-Tao, Yang, Shi-Yi, Yue, Yuan, Bian, Shao-Wei
Format: Article
Language:English
Online Access:Get full text
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Summary:Constructing high capacitance active materials and three-dimensional (3D) conductive networks inside textile yarn frames is a promising strategy to synthesize yarn supercapacitor electrodes. In this study, growing NiCo2S4@Ni–Co layered double hydroxide (LDH) nanotube arrays on Au-metalized cotton yarns yields a novel yarn supercapacitor electrode material. The resulting yarn electrode possesses numerous merits, including high electrical conductivity from NiCo2S4 and Au-metalized cotton yarns, high capacitance of Ni–Co LDH nanosheets, and the 3D hierarchical electrode structure. The unique electrode structure leads to excellent electrochemical properties including high capacitance (5680 mF cm–2), excellent rate performance, and stable cycling performance. A two-ply symmetric yarn supercapacitor assembled from the NiCo2S4/Ni–Co LDH/Au/cotton yarn electrode reaches an areal energy density of 3.5 μW h cm–2.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.9b06317