期刊
NATURE COMMUNICATIONS
卷 6, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms8259
关键词
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资金
- Wallenberg Wood Science Centre - Knut and Alice Wallenbergs (KAW) Research Foundation
- Power paper project at Linkoping University - Knut and Alice Wallenbergs (KAW) Research Foundation
- BiMaC Innovation at KTH
- Gunnar Sundblad Research Foundation
- Bo Rydins stiftelse SCA
- Sweden-America Foundation
- Marie Curie EU fellowship
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1542152] Funding Source: National Science Foundation
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 Fg(-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.
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