N-doped hollow carbon nanoplates with mesoporous thin shells towards high-performance supercapacitors

Xiangjun Lu*, Jie Wang, Tao Li, Bing Ding, Shude Liu, Joel Henzie, Mohammed A. Amin, Brian Yuliarto, Yoshiyuki Sugahara, Yusuke Yamauchi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Integrating hollow structures and ordered mesopores in carbon materials is critical for electrochemical devices to facilitate fast ion-transport pathways and large ion-accessible surface areas. In this work, a self-templating method is used to prepare hollow ordered mesoporous carbon (HOMC) materials by self-assembling resol-F127 composite micelles on the surface of two-dimensional (2D) metal-organic-framework (MOF) nanoplates, followed by polymerization and carbonization. During the hydrothermal reaction, MOF nanoplates act as a 2D template to assemble resol-F127 composite micelles, leading to hollow ordered mesostructured polymer (HOMP). At the same time, N-containing species are released from the dissolved MOF nanoplates, resulting in N-doped HOMC after carbonization. Benefiting from the structural advantages (e.g., high surface area, hierarchical porous architecture composed of hollow interiors and thin mesoporous shells) and the high amount of N-doping, the as-prepared HOMC exhibits superior electrochemical performance for supercapacitors, demonstrated by a high specific capacitance of 271 F g−1 at a current density of 0.5 A g−1, excellent rate capability, and high capacitance retention of 98.1% after 20,000 cycles. The strategy can provide a new avenue for designing and constructing hollow carbon materials for various applications in electrochemical energy storage devices.

Original languageEnglish
Article number231776
JournalJournal of Power Sources
Volume542
DOIs
Publication statusPublished - 2022 Sep 15

Keywords

  • Heterostructured carbon
  • Hollow structure
  • Hybrid materials
  • Mesoporous materials
  • Metal-organic frameworks
  • Porous carbons
  • Supercapacitors

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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