Monolithic Carbide-Derived Carbon Films for Micro-Supercapacitors
Monolithic Carbide-Derived Carbon Films for Micro-Supercapacitors
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DOI：
10.1126/science.1184126
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发表时间：
2010-04-23
期刊：
影响因子：
56.9
通讯作者：
Gogotsi, Yury
中科院分区：
文献类型：
--
作者：
Chmiola, John;Largeot, Celine;Gogotsi, Yury
通过普通微制造技术生产的具有数十至数百微米尺寸的微电池准备提供电源到电子设备上的集成，但是它们仍然遭受差的循环寿命以及功率和操作温度范围的问题，这些问题通过使用超级电容器来缓解。关于薄膜和其他微型超级电容器有一些报道，但它们要么太薄，无法提供足够的能量，要么技术不可扩展。通过将超级电容器电极蚀刻到导电的碳化钛基底中，我们证明了单片碳膜导致的体积容量超过迄今为止报道的微型和大型超级电容器的体积容量，为2倍。该研究还为将高性能微型超级电容器集成到各种设备上提供了框架。
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.