超级电容器
介孔材料
纳米棒
材料科学
化学工程
纳米技术
碳纤维
多孔性
电容
比表面积
电解质
电化学
纳米孔
模板方法模式
水溶液
电极
化学
复合材料
复合数
有机化学
催化作用
工程类
物理化学
作者
George Hasegawa,Kazuyoshi Kanamori,Tsutomu Kiyomura,Hiroki Kurata,Takeshi Abe,Kazuki Nakanishi
标识
DOI:10.1021/acs.chemmater.6b01261
摘要
This report demonstrates a facile one-pot synthesis of hierarchically porous resorcinol-formaldehyde (RF) gels comprising mesoporous nanorod assemblies with two-dimensional (2D) hexagonal ordering by combining a supramolecular self-assembly strategy in the nanometer scale and phase separation in the micrometer scale. The tailored multilevel pore system in the polymer scaffolds can be preserved through carbonization and thermal activation, yielding the multimodal porous carbon and activated carbon (AC) monoliths. The thin columnar macroframeworks are beneficial for electrode materials due to the short mass diffusion length through small pores (micro- and mesopores). By employing the nanostructured AC monolith as a binder-free electrode for supercapacitors, we have also explored the capability of “water-in-salt” electrolytes, aiming at high-voltage aqueous supercapacitors. Despite that the carbon electrode surface is supposed to be covered with salt-derived decomposition products that hinder the water reduc...
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