Issue 23, 2019

Two-dimensional hierarchically porous carbon nanosheets for flexible aqueous supercapacitors with high volumetric capacitance

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.

Graphical abstract: Two-dimensional hierarchically porous carbon nanosheets for flexible aqueous supercapacitors with high volumetric capacitance

  • This article is part of the themed collection: Nanocarbons

Supplementary files

Article information

Article type
Communication
Submitted
21 mar 2019
Accepted
22 may 2019
First published
22 may 2019

Nanoscale, 2019,11, 11086-11092

Two-dimensional hierarchically porous carbon nanosheets for flexible aqueous supercapacitors with high volumetric capacitance

L. Yao, J. Lin, H. Yang, Q. Wu, D. Wang, X. Li, L. Deng and Z. Zheng, Nanoscale, 2019, 11, 11086 DOI: 10.1039/C9NR02476J

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