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

Lei Yao, Junsheng Lin, Haitao Yang, Qin Wu, Dongrui Wang, Xiujuan Li, Libo Deng, Zijian Zheng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

25 Citations (Scopus)

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 languageEnglish
Pages (from-to)11086-11092
Number of pages7
JournalNanoscale
Volume11
Issue number23
DOIs
Publication statusPublished - 21 Jun 2019

ASJC Scopus subject areas

  • Materials Science(all)

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