Hierarchical porous carbon materials from nanosized metal-organic complex for high-performance symmetrical supercapacitor

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Shuai Zhang
  • Xiaoze Shi
  • Dariusz Moszyński
  • Tao Tang
  • Xuecheng Chen
  • Ewa Mijowska

Detail(s)

Original languageEnglish
Pages (from-to)580-589
Journal / PublicationElectrochimica Acta
Volume269
Online published9 Mar 2018
Publication statusPublished - 10 Apr 2018

Abstract

The accessible surface area, conductivity, and pore size determine the capacitive properties of carbon-based materials. In this work, hierarchical nanoporous carbon (NPC) materials with a large specific surface area, high conductivity, and suitable pore size are prepared from nanoscaled Al-based metal-organic complex (Al-MOC) by annealing. The annealing temperature has a profound influence on the morphology of the NPC materials which in turn impact the electrochemical performance. Compared to annealing at a low temperature, an interconnected structure is formed at an annealing temperature exceeding 950 °C to produce a larger accessible surface area. Owing to the interconnected structure and high conductivity, sample NPC-950 with the two-electrode configuration has the highest specific capacitance and the best stability. The specific capacitances are 298 Fg-1 at a scanning rate of 1 mVs-1 in symmetrical supercapacitor device. These values are the largest values reported from ultrapure carbon-based EDLCs in an aqueous electrolyte so far. Furthermore, 96.73% of the capacity is retained after 5000 cycles in 1 M H2SO4 electrolyte. In an organic electrolyte, the supercapacitor cells composed of NPC produce an energy density of 43 Wh kg−1. The NPC materials with large specific capacity and excellent stability produced by the simple and cost effective technique have large potential in supercapacitors.

Citation Format(s)

Hierarchical porous carbon materials from nanosized metal-organic complex for high-performance symmetrical supercapacitor. / Zhang, Shuai; Shi, Xiaoze; Moszyński, Dariusz; Tang, Tao; Chu, Paul K.; Chen, Xuecheng; Mijowska, Ewa.

In: Electrochimica Acta, Vol. 269, 10.04.2018, p. 580-589.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review