Hydrous RuO2/carbon nanowalls hierarchical structures for all-solid-state ultrahigh-energy-density micro-supercapacitors
Hydrous RuO2/carbon nanowalls hierarchical structures for all-solid-state ultrahigh-energy-density micro-supercapacitors
复制标题
DOI：
10.1016/j.nanoen.2014.10.003
复制
发表时间：
2014-11-01
期刊：
影响因子：
17.6
通讯作者：
Pech, David
中科院分区：
文献类型：
--
作者：
Dinh, Ty Mai;Achour, Amine;Pech, David
微型超级电容器由于其独特的性能和在各种智能电子设备中的潜在应用而引起了片上储能研究的广泛关注。尽管已经报道了它们的功率性能的显著进步，但是它们仍然不能在移动的、便携式和自供电应用的能量密度方面与微型电池竞争。在本文中，我们展示了用多孔氧化钌装饰的垂直排列的碳球（CNW）的制造，作为全固态微型超级电容器的高性能电极。修饰的CNW电极基本上由石墨烯域组装的薄碳片组成，提供超过1000 mF cm（-2）的比电容（比现有技术的微型超级电容器高三个数量级）和与锂离子微型电池相当的能量密度，但具有上级功率和循环稳定性。我们的研究结果展示了一条将快速充电/放电速率与高能量密度相结合的微型超级电容器集成的路线。(C)2014爱思唯尔有限公司版权所有。
Micro-supercapacitors have attracted considerable research attention for on-chip energy storage due to their unique properties and potential applications in various smart electronic devices. Although significant advances have been reported on their power performances, they still cannot compete with micro-batteries in terms of energy densities for mobile, portable and self-powered applications. Herein, we demonstrate the fabrication of vertically aligned carbon nanowalls (CNW) decorated with porous ruthenium oxide as a high-performance electrode for all-solid-state micro-supercapacitors. The decorated CNW electrode, essentially consisting of thin carbon sheets assembled from graphene domains, delivers specific capacitance in excess of 1000 mF cm(-2) (which is three orders of magnitude higher than state-of-the-art micro-supercapacitors) and energy density comparable to that of lithium-ion micro-batteries, but with superior power and cycling stability. Our findings demonstrate a route towards the integration of microfabricated supercapacitors combining fast charge/discharge rates with high energy densities. (C) 2014 Elsevier Ltd. All rights reserved.