Self-assembled three-dimensional and compressible interdigitated thin-film supercapacitors and batteries
| Autor: | Lars Wågberg, Erdem Karabulut, Gustav Nyström, Andrew Marais, Mahiar Hamedi, Yi Cui |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Traditional thin-film energy-storage devices consist of stacked layers of active films on two-dimensional substrates and do not exploit the third dimension. Fully three-dimensional thin-film devices would allow energy storage in bulk materials with arbitrary form factors and with mechanical properties unique to bulk materials such as compressibility. Here we show three-dimensional energy-storage devices based on layer-by-layer self-assembly of interdigitated thin films on the surface of an open-cell aerogel substrate. We demonstrate a reversibly compressible three-dimensional supercapacitor with carbon nanotube electrodes and a three-dimensional hybrid battery with a copper hexacyanoferrate ion intercalating cathode and a carbon nanotube anode. The three-dimensional supercapacitor shows stable operation over 400 cycles with a capacitance of 25 F g−1 and is fully functional even at compressions up to 75%. Our results demonstrate that layer-by-layer self-assembly inside aerogels is a rapid, precise and scalable route for building high-surface-area 3D thin-film devices. It is challenging to construct three-dimensional thin-film energy-storage devices. Here the authors present supercapacitors and batteries based on layer-by-layer self-assembly of interdigitated thin films inside aerogels, demonstrating energy storage as well as compressibility in three-dimensional devices. |
| Databáze: | OpenAIRE |
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