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.
Original language | English |
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Pages (from-to) | 11086-11092 |
Number of pages | 7 |
Journal | Nanoscale |
Volume | 11 |
Issue number | 23 |
DOIs | |
Publication status | Published - 21 Jun 2019 |
ASJC Scopus subject areas
- Materials Science(all)