Journal
NANOSCALE
Volume 11, Issue 23, Pages 11086-11092Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9nr02476j
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Funding
- National Natural Science Foundation of China [51702217, 51602202]
- Natural Science Foundation of Guangdong [2017A030310434, 2015A030310087]
- Shenzhen Government's Plan of Science and Technology [KQJSCX2017033011014404]
- Hong Kong Polytechnic University [1-ZVK1, G-YBGZ]
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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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