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Associate Prof. Peng et al. from LZU SPST publishes thesis in Advanced Energy Materials

By LZU | 29/05/2017 10:40:00 | Views ()

Recently, the student and professors from School of Physical Science and Technology (SPST) of LZU published online a significant research result in Advanced Energy Materials. The result was entitled "Flexible and Wearable All-solid-state Supercapacitors with Ultrahigh Energy Density Based on a Carbon Fiber Fabric Electrode" (Qin et al, 2017, DOI:10.1002/aenm.201700409). The first author of the article was the postgraduate student named Qin Tianfeng, its corresponding author is Associate Prof. Peng Shanglong, its co-corresponding author is Prof.  Cao Guozhong from University of Washington, and the signature unit of the first author is LZU. Advanced Materials is the subsidiary serial of Advanced Energy Materials. with its impact factor being 15.23 in 2016. Meanwhile, the article was recommended as the magazine's cover by the editor. The publication of the research has marked a significant improvement in exploration of making flexible wearable energy storage device practical. The study was funded by the Natural Science Foundation of China.

The abstract of the thesis is as follows:

The new generation of miniaturized energy storage devices offers high energy and power densities and is compatible with flexible, portable, or wearable textile electronics which are currently in great demand. Here, we demonstrate the successful development of flexible, wire shaped (f-WS) all-solid-state symmetric supercapacitors (SCs) based on a facile electropolymerization of polythiophene (e-PTh) on titania (Ti) wire. The f-WS all-solid-state symmetric SCs, exhibiting high electrochemical performance, are fabricated by slightly intertwining two similar e-PTh electrodes to form both the cathode and anode which are then individually coated with a thin layer of H2SO4–PVA gel, acting both as electrolyte and as separator. The optimized devices (∼1.5 cm long), based on e-PTh/Ti wire show a high capacitive performance (1357.31 mF g−1 or 71.84 mF cm−2) and an extremely high energy density (23.11 μW h cm−2) at a power density of 90.44 μW cm−2 using an operational potential window of 1.8 V, which is beneficial for applications requiring high energy and power. The robust f-WS all-solid-state symmetric SCs also exhibit excellent mechanical flexibility with minimal change in capacitance upon bending at 360°. Furthermore, the SCs were implemented in the textile of a wearable/portable electronic device using a conventional weaving method, thus demonstrating a high potential for next-generation wearable textile electronic applications.

Click here to see the thesis

(Translated by Huang Pin; proofread by Zhang Lu)

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