Self-woven nanofibrillar PEDOT mats for impact-resistant supercapacitors
| Autor: | Micah Rubin, Yifan Diao, Julio M. D’Arcy, Luciano M. Santino, Yang Lu, Hongmin Wang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Supercapacitor
Materials science Nanostructure Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology 02 engineering and technology Nanoengineering 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Capacitance Energy storage 0104 chemical sciences Micrometre Fuel Technology PEDOT:PSS Electrode Composite material 0210 nano-technology |
| Zdroj: | Sustainable Energy & Fuels. 3:1154-1162 |
| ISSN: | 2398-4902 |
| DOI: | 10.1039/c8se00591e |
| Popis: | Here, we demonstrate a nanoengineering strategy that leads to an impact-resistant electrode for flexible energy storage devices such as supercapacitors resulting in state-of-the-art electrochemical performance. A template-less direct vapor synthesis produces a mat of poly(3,4-ethylenedioxythiophene) (PEDOT) 1D nanostructures. A nucleation-controlled self-weaving mechanism is supported enabling rapid synthesis of an electrochemically active flexible electrode in a single step from the vapor phase. Nanofibres self-assemble and “weave” in situ into a micrometer thick porous fibrillar mat characterized by a horizontally-directed interwoven nanofibrillar orientation. A nanofibrillar PEDOT mat is characterized by high conductivity (334 S cm−1), capacitance (164 F g−1) and flexibility (stable upon bending) as well as impact-resistance properties enabling it to withstand an impact energy density of 125 kJ m−2 and to continue storing energy. After a single 125 kJ m−2 mechanical impact, a symmetric electrochemical capacitor composed of nanofibrillar PEDOT mats is cycled for 11 000 times with 80% capacitance retention. After forty 125 kJ m−2 impacts, capacitance degrades by 6% and 1D electrode architecture remains. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|