Journal
MICRO & NANO LETTERS
Volume 7, Issue 12, Pages 1166-1169Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/mnl.2012.0563
Keywords
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Funding
- National Natural Science Foundation of China [60936003]
- 973 programme [2009CB320304]
- 863 programme of China [2009AA04Z319]
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Presented is a microsupercapacitor using SU-8 photoresist as the separator, featuring by high-aspect-ratio three-dimensional (3D) electrodes and high capacity per unit area. A scalable and mechanically stable structure for microsupercapacitors has been designed. By combining the preparation strategy for self-supporting nanoporous electrodes with micromachining technologies for high-aspect-ratio structures, 3D electrodes that allow for a heavy load of electrode material per unit area has been achieved. Electrochemical characterisation results of the prototype using ionic liquid as the electrolyte demonstrate that the microsupercapacitor exhibits a high specific energy of 330 mJcm(-2) and a large specific capacitance of 160 mFcm(-2), which are attributed to both the high-performance materials and the well-designed microstructure. This device can be potentially applied to various energy systems, such as electronic backup power supplies and microenergy storage devices.
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