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Nitrogen-Doped Mesoporous Carbon Microspheres by Spray Drying-Vapor Deposition for High-Performance Supercapacitor

Authors
  • Sun, Xiaoran1, 2
  • Kong, Yueqi2
  • Liu, Yang3
  • Zhou, Liang4
  • Nanjundan, Ashok Kumar2
  • Huang, Xiaodan2
  • Yu, Chengzhong2, 3
  • 1 Institute of Photovoltaics, Southwest Petroleum University, Chengdu , (China)
  • 2 Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD , (Australia)
  • 3 School of Chemistry and Molecular Engineering, East China Normal University, Shanghai , (China)
  • 4 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan , (China)
Type
Published Article
Journal
Frontiers in Chemistry
Publisher
Frontiers Media S.A.
Publication Date
Nov 10, 2020
Volume
8
Identifiers
DOI: 10.3389/fchem.2020.592904
Source
Frontiers
Keywords
Disciplines
  • Chemistry
  • Original Research
License
Green

Abstract

Nitrogen-doped mesoporous carbon microspheres have been successfully synthesized via a spray drying-vapor deposition method for the first time, using commercial Ludox silica nanoparticles as hard templates. Compared to freeze-drying and air-drying methods, mesoporous carbon with a higher packing density can be achieved through the spray drying method. Vapor deposition of polypyrrole followed by carbonization and etching is beneficial for the generation of ultra-thin carbon network. The mesoporous carbon microspheres possess a mesopore-dominate (95%) high surface area of 1528 m2 g−1, a wall thickness of 1.8 nm, and a nitrogen content of 8 at% in the framework. Benefiting from the increased apparent density, high mesopore surface area, and considerable nitrogen doping, the resultant mesoporous carbon microspheres show superior gravimetric/volumetric capacitance of 533.6 F g−1 and 208.1 F cm−3, good rate performance and excellent cycling stability in electric double-layer capacitors.

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