材料科学
超级电容器
石墨烯
阳极
氧化物
阴极
纳米技术
碳纳米管
制作
电解质
电容
准固态
电极
电化学
冶金
色素敏化染料
电气工程
医学
化学
替代医学
工程类
物理化学
病理
作者
Gou–Chung Chi,Wei Gong,Guihua Xiao,Jun Pan,Junyan Chen,Lei Su,Bunshi Fugetsu,Ichiro Sakata,Xueji Zhang
出处
期刊:Nano Energy
[Elsevier]
日期:2023-12-01
卷期号:117: 108887-108887
标识
DOI:10.1016/j.nanoen.2023.108887
摘要
Wire-shaped flexible supercapacitors (FSCs) have attracted tremendous attention due to their tiny volume, lightweight, high flexibility, and wearability. In the present study, we report the design and electrochemical fabrication of the MnO2- or Fe2O3-loaded three-dimensional (3D) nanostructure network of the reduced graphene oxide (rGO) composite on the oxidized CNT fiber (denoted as the OCNTF/3D-rGO/MnO2 and OCNTF/3D-rGO/Fe2O3) as the cathode and anode, respectively, for the fabrication of a high-performance, wire-shaped, all-solid-state, flexible asymmetric supercapacitor (FASC). The 3D-rGO/OCNTF hierarchical structure was first fabricated, followed by the pulse electrodeposition of MnO2 and Fe2O3, respectively, into the 3D porous graphene networks and the insides of the OCNTF. As such, they were restricted to nano-sized particles and linked by the graphene and the OCNTF. The OCNTF/3D-rGO/MnO2 as the cathode was assembled with the OCNTF/3D-rGO/Fe2O3 as the anode with the carboxymethyl cellulose sodium (CMC)-Na2SO4 gel electrolyte, producing a wire-shaped, all-solid-state FASC that achieved a high specific capacitance of 59.2 F·cm-3 (171 mF·cm-2) and an exceptional energy density of 26.7 mWh·cm-3. The obtained FASC device also showed good flexibility and cyclability, making it a promising power source for wearable electronics.
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