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Updated: Jan 23, 2026

Preparation of Carbon Nanosheets at Room Temperature
Published on: March 8, 2016
Two-dimensional hierarchically porous carbon nanosheets for flexible aqueous supercapacitors with high volumetric
Lei Yao1, Junsheng Lin2, Haitao Yang1
1Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advanced Technology of Ceramics, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, P. R. China. lyao@szu.edu.cn.
Abstract:
Two-dimensional carbon nanomaterials can be assembled into a dense film and used for flexible supercapacitors, but the high packing density leads to restacking problems and poor volumetric capacitance. To address this challenge, we report two-dimensional hierarchically porous carbon (2D-HPC) consisting of micro-, meso-, and macro-pores on the 2D sheet, which shows superior capacitance and rate capability compared with a 2D carbon nanosheet consisting predominantly of micro-pores. A flexible supercapacitor fabricated with the 2D-HPC presents a high volumetric capacitance of 412 F cm-3, a high volumetric energy density of 9.2 mW h cm-3 and a power density of 120 mW cm-3.
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