Porous highly conductive PEDOT film for high-performance supercapacitors

超级电容器 佩多:嘘 材料科学 导电体 多孔性 电容 纳米技术 光电子学 复合材料 电极 图层(电子) 化学 物理化学
作者
Wanying Zhang,Zhen Su,Bei Qi,Wentao Wang,Shisong Nie,Yingzhi Jin,Jiaxing Song,Lin Hu,Xinxing Yin,Wei-Hua Ning,Xiaoming Yang,Hao Wang,Zaifang Li,Liang Huang
出处
期刊:Nano materials science [Elsevier]
被引量:1
标识
DOI:10.1016/j.nanoms.2024.05.008
摘要

Thick and highly conductive poly(3,4-ethylenedioxythiophene)-polystyrene sulfonate films with ideal porous structure are fulfilling as electrodes for supercapacitors. However, the homogeneous micro-structure without the aid of templates or composite presents a significant obstacle, due to the intrinsic softness of the dominant PSS component. In this study, we have successfully developed a porous configuration by employing a solvothermal approach with ethylene glycol (EG) as the solvent. The synergistic action of elevated pressure and temperature was crucial in prompting EG to tailor the microstructure of the PEDOT:PSS films by removing non-conductive PSS chains and improving PEDOT crystallinity, and the formation of a porous network. The resulting porous PEDOT:PSS films exhibited a high conductivity of 1644 ​S ​cm−1 and achieved a volumetric capacitance record of 270 ​F ​cm−3, markedly exceeding previous records. The flexible all-solid-state supercapacitor assembled by the films had an outstanding volumetric capacitance of 97.8 ​F ​cm−3 and an energy density of 8.7 ​mWh cm−3, which is best one for pure PEDOT:PSS-based supercapacitors. Grazing-incidence wide-angle X-ray scattering, X-ray photo-electron spectroscopy, and other characterizations were carried out to characterize the structure evolution. This work offers an effective novel method for conducting polymer morphology control and promotes PEDOT:PSS applications in energy storage field.
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