期刊
ENERGY TECHNOLOGY
卷 2, 期 4, 页码 362-369出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ente.201402018
关键词
Li-ion batteries; carbon; energy storage; microfabrication; three-dimensional
资金
- Office of Naval Research
Progress in the miniaturization of batteries has lagged well behind that of microelectronics. Although lithium-ion (Li-ion) battery technology has been vital in advancing portable consumer electronics, it is not clear whether future generations of microscale devices can be powered using traditional battery designs. In this paper, we report on the fabrication and properties of battery electrodes comprised of arrays of vertically aligned carbon rods. The electrodes exhibit good reversibility and represent the first carbon arrays to achieve areal capacities greater than 5 mAhcm(-2) at relatively large current densities, although the capacity does fade with cycling. The 3D battery designs based on these architectures offer the promise of achieving high energy densities within small footprint areas.
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