超级电容器
聚吡咯
电极
纳米线
材料科学
铜
电化学
电容
纤维
导电体
电解质
复合材料
纳米技术
化学工程
化学
冶金
工程类
物理化学
作者
Ruirong Zhang,Changnan Chen,Huhu Yu,Sheng Cai,Yanmeng Xu,Yang Yang,Honglong Chang
标识
DOI:10.1016/j.jelechem.2021.115323
摘要
A wire-shaped asymmetric supercapacitor based on CuO and polypyrrole (PPy) is developed in this work. The fiber-shaped positive electrode composed of CuO nanowires (CuO NWs) on Cu wire (Cu wire/CuO NWs) is successfully prepared via anodization of copper wire followed by thermal treatment. Meanwhile, conductive polymer PPy is grown on carbon fiber bundle (CF/PPy) by electrodeposition as a negative electrode. Subsequently, an all-solid-state wire-shaped asymmetric supercapacitor is assembled with Cu wire/CuO NWs, CF/PPy and PVA-KOH gel electrolyte. Benefiting from the efficient pseudocapacitive properties of the binder-free positive electrode with CuO nanowires directly grown on the copper wire surface and the negative electrode with PPy tightly covered on the carbon fibers, the all-solid-state wire-shaped asymmetric supercapacitor assembled exhibits a high energy density (9.31 μWh cm−2) and specific capacitance (39.67 mF cm−2, 24.91 mF cm−1). Moreover, this device also shows an excellent stability of electrochemical performance at different bending conditions, demonstrating its potential to serve as a flexible power source for portable/wearable electronics.
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