超级电容器
材料科学
介孔材料
纳米技术
电极
碳纤维
电化学能量转换
纳米结构
储能
纳米尺度
电化学
化学工程
复合材料
功率(物理)
催化作用
复合数
有机化学
化学
物理
工程类
物理化学
量子力学
作者
Xin Xi,Dongqing Wu,Lu Han,Yizhen Yu,Yuezeng Su,Wei Tang,Ruili Liu
出处
期刊:ACS Nano
[American Chemical Society]
日期:2018-05-07
卷期号:12 (6): 5436-5444
被引量:82
标识
DOI:10.1021/acsnano.8b00576
摘要
A soft-hard template-assisted method toward the unconventional free-standing ordered mesoporous carbon sheets (OMCSs) with uniform hexagonal morphology is developed by applying MgAl-layered double hydroxide (MgAl-LDH) as the hard template, triblock copolymer F127 as the soft template, and phenolic resols as the carbon sources. It is found that the surface of MgAl-LDH can induce the morphology variation of resol-F127 monomicelles, leading to the formation of vertically or horizontally aligned mesopore arrays in the OMCSs, which can in turn determine their electrochemical energy storage behaviors in supercapacitors with different configurations. In an all-solid-state supercapacitor with two face-to-face electrodes, an OMCS with vertical mesopores manifests the best performance among the samples. By contrast, in a micro-supercapacitor with in-plane film-like electrodes, an OMCS with horizontal mesopores delivers higher energy/power densities than the other OMCSs, which are also comparable to the state-of-the-art supercapacitors based on ordered mesoporous carbons. The achievement of uniform carbon sheets with orientation-adjustable mesopore arrays can help elucidate their electrochemical storage mechanism and allow the optimization of the performances according to the device configuration, thus providing a powerful tool for the manipulation of energy storage devices on the nanoscale.
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