Carboxymethylcellulose/poly(3,4-ethylenedioxythiophene):polystyrene sulfonate membrane after dimethyl sulfoxide treatment for flexible and high electrochemical performance asymmetric supercapacitors

聚苯乙烯磺酸盐 佩多:嘘 超级电容器 材料科学 化学工程 电化学 聚苯乙烯 电容 功率密度 电极 聚合 纳米技术 复合材料 聚合物 化学 图层(电子) 生物化学 物理化学 工程类 功率(物理) 物理 量子力学
作者
Hanping Xu,Jingqiao Zhu,Tao Zhao,Qiangli Hu,Mincai Xu,Zijie Lei,Xiaojuan Jin
出处
期刊:International Journal of Biological Macromolecules [Elsevier BV]
卷期号:251: 126430-126430
标识
DOI:10.1016/j.ijbiomac.2023.126430
摘要

As the requirements for wearable electronic devices continue to increase, the development of bendable and foldable supercapacitors is becoming critical. However, it is still challenging to design free-standing electrodes with flexibility and high electrical conductivity. Herein, using carboxymethylcellulose (CMC) as the biological template and poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) as the electroactive material, a flexible CMC/PEDOT:PSS membrane with a cross-linked mesh structure was firstly synthesized by a facile in-situ polymerization and vacuum filtration process. Subsequently, the CMC/PEDOT:PSS membrane was further treated with dimethyl sulfoxide (DMSO) to remove the excess PSS, thereby enhancing their electrochemical performance. The results showed that the best performing hybrid membrane had good mechanical properties (tensile strength of 48.1 MPa) and high electrical conductivity (45.1 S cm−1). The assembled asymmetric supercapacitor (ASC) is capable of delivering an energy density of 181.9 μW h cm−2 at a power density of 750 μW cm−2 and maintains an initial capacitance of 93.4 % and a coulombic efficiency of 100 % after 10,000 GCD cycles, demonstrating an ultra-long cycle life. Moreover, good electrochemical properties can be retained even in the bent and folded state. Therefore, the hybrid membrane electrode with both flexibility and high electrochemical performance has great potential for application in wearable electronics.
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