期刊
SCIENCE
卷 328, 期 5977, 页码 480-483出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1184126
关键词
-
资金
- NSF
- Delegation Generale pour l'Armement
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [ER46473]
- Partnership University Fund grant
Microbatteries with dimensions of tens to hundreds of micrometers that are produced by common microfabrication techniques are poised to provide integration of power sources onto electronic devices, but they still suffer from poor cycle lifetime, as well as power and temperature range of operation issues that are alleviated with the use of supercapacitors. There have been a few reports on thin-film and other micro-supercapacitors, but they are either too thin to provide sufficient energy or the technology is not scalable. By etching supercapacitor electrodes into conductive titanium carbide substrates, we demonstrate that monolithic carbon films lead to a volumetric capacity exceeding that of micro-and macroscale supercapacitors reported thus far, by a factor of 2. This study also provides the framework for integration of high-performance micro-supercapacitors onto a variety of devices.
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