Co-electro-deposition of the MnO sub(2)-PEDOT:PSS nanostructured composite for high areal mass, flexible asymmetric supercapacitor devices

• Published in: Journal of materials chemistry. A, Materials for energy and sustainability Vol. 1; no. 40; pp. 12432 - 12440
• Main Authors: Su, Zijin, Yang, Cheng, Xu, Chengjun, Wu, Haoyi, Zhang, Zhexu, Liu, Ting, Zhang, Chen, Yang, Quanhong, Li, Baohua, Kang, Feiyu
• Format: Journal Article
• Language: English
• Published: 01.09.2013
• ISSN: 2050-7488; 2050-7496
• DOI: 10.1039/c3ta13148c

To meet the rapidly growing demand, it is necessary to develop novel flexible energy storage devices with a high energy density in a limited area, a fast charging ability, a low cost for mass production and a miniaturized device size. To address the above issues, here we introduce the co-electro-deposition strategy, which is able to prepare an electrode material with a high areal capacitance (1670 mF cm super(-2) at 0.5 mA cm super(-2)), a high areal mass (8.5 mg cm super(-2)), an excellent mechanical robustness, a high through-put and great convenience even on a piece of a ubiquitous stainless steel mesh current collector. Based on this advancement, we are able to obtain an ultrathin (less than 200 mu m) aqueous asymmetric supercapacitor device with a high energy density (1.8 10 super(-3) W h cm super(-3)), a high power density (0.38 W cm super(-3) at 3.62 10 super(-4) W h cm super(-3)) and an excellent rate capability. This energy storage device is integrated into a prototype smart card to drive a light emitting diode (LED) indicator, which is charged for 5 seconds and can light up the indicator for more than 2 hours, demonstrating great promise in miniaturized novel flexible energy storage devices.