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3D Porous Mixed‐Valent Manganese Oxide Nanosheets Electrodeposited onto Flexible Ag‐CNT Textiles for Highly Improved Capacitive Performances
Author(s) -
Ko WenYin,
Chung ChiaChing,
Lin KuanJiuh
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201702248
Subject(s) - materials science , nanocomposite , carbon nanotube , supercapacitor , chemical engineering , nanotechnology , capacitance , electrode , oxide , capacitive sensing , porosity , manganese oxide , faraday efficiency , manganese , electrolyte , composite material , metallurgy , chemistry , computer science , engineering , operating system
Abstract A simple yet efficient one‐pot ultrasonication process for the green preparation of a silver–carbon nanotube (Ag‐CNT) ink, which was then used to fabricate conductive flexible thin films by a simple immersion process, is reported. A novel three‐dimensional (3D) porous, hierarchical Ag–MnO x –CNT nanocomposite was synthesized by electrodeposition of manganese oxide (MnO x ) nanosheets composed of MnO 2 and Mn 3 O 4 onto the Ag–CNT films. The unique Ag–MnO x –CNT electrode showed a specific capacitance of 842 F/g at 1 A/g and excellent charge–discharge cycling stability, with a capacitance retention of 148% at 10 A/g and a Coulombic efficiency of ∼90% after 5000 cycles. The greatly enhanced capacitive performance is ascribed to the facile redox reactions, 3D porous framework, and use of Ag NPs. These impressive results suggest that this nanocomposite is a promising candidate for use in high‐performance flexible energy storage applications.