期刊
ACS NANO
卷 11, 期 11, 页码 11047-11055出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.7b05085
关键词
hierarchically porous carbon; graphitic; ice templating supercapacitors; water treatment; pore volume
类别
资金
- U.S. Department of Energy (DOE) [DE-AC05-76RL01830]
- Office of Vehicle Technologies of the U.S. DOE through the Advanced Battery Materials Research (BMR) program [DE-AC02-05CH11231, 18769]
- U.S. DOE Office of Biological and Environmental Research
- DOE, Office of Science, Office of Basic Energy Sciences, Chemical Sciences, Geosciences & Biosciences Division
- Linus Pauling Distinguished Postdoctoral Fellowship program
- Pacific Northwest National Laboratory
Developing hierarchical porous carbon (HPC) materials with competing textural characteristics such as surface area and pore volume in one material is difficult to accomplish, particularly for an atomically ordered graphitic carbon. Herein we describe a synthesis strategy to engineer tunable HPC materials across micro-, meso-, and macroporous length scales, allowing the fabrication of a graphitic HPC material (HPC-G) with both very high surface area (>2500 m(2)/g) and pore volume (>11 cm(3)/g), the combination of which has not been attained previously. The mesopore volume alone for these materials is up to 7.53 cm(3)/g, the highest ever reported, higher than even any porous carbons total pore volume, which for our HPC-G material was >11 cm(3)/g. This HPC-G material was explored for use both as a supercapacitor electrode and for oil adsorption, two applications that require either high surface area or large pore volume, textural properties that are typically exclusive to one another. We accomplished these high textural characteristics by employing ice templating not only as a route for macroporous formation but as a synergistic vehicle that enabled the significant loading of the mesoporous hard template. This design scheme for HPC-G materials can be utilized in broad applications, including electrochemical systems such as batteries and supercapacitors, sorbents, and catalyst supports, particularly supports where a high degree of thermal stability is required.
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