Molten salt electrosynthesis of Cr2AlC-derived porous carbon for supercapacitors

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

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Author(s)

  • Zhongya Pang
  • Xingli Zou
  • Xiaolu Xiong
  • Shujuan Wang
  • Li Ji
  • Guangxin Wu
  • Qian Xu
  • Xionggang Lu

Detail(s)

Original languageEnglish
Pages (from-to)12938-12947
Journal / PublicationACS Sustainable Chemistry and Engineering
Volume7
Issue number15
Online published5 Jul 2019
Publication statusPublished - 5 Aug 2019

Abstract

Porous carbon is the most extensively investigated electrode material for supercapacitors. In this work, Cr2AlC-derived porous carbon (Cr2AlC-CDC) has been facilely synthesized by an electrochemical etching process in molten salts. The electrochemical processes with different etching parameters were systematically investigated, and the result shows that the Cr2AlC-CDC obtained at 600 °C and 3.0 V exhibits an amorphous carbon structure with micro/mesopores and high specific surface area (1343 m2/g). In addition, higher temperature would increase the graphitization degree of CDC. The formation process of Cr2AlC-CDC was also theoretically investigated by the density functional theory (DFT) method, and the intermediate products were experimentally characterized as well as compared to the DFT result. It is found that the reaction mechanism typically contains the electro-oxidation process and the electrochemical etching process. Furthermore, the specific capacity of the Cr2AlC-CDC obtained at 600 °C can reach 183 F g-1 at 500 mA g-1 and remains at 98.2% after 5000 cycles, demonstrating excellent electrochemical performance for supercapacitors. The electrochemical etching process in molten salt has been proved to be a promising sustainable method for synthesizing CDC materials for supercapacitors.

Research Area(s)

  • Density functional theory, Electrosynthesis, Molten salts, Porous carbon, Supercapacitors

Citation Format(s)

Molten salt electrosynthesis of Cr2AlC-derived porous carbon for supercapacitors. / Pang, Zhongya; Zou, Xingli; Xiong, Xiaolu; Wang, Shujuan; Ji, Li; Hsu, Hsien-Yi; Wu, Guangxin; Xu, Qian; Lu, Xionggang.

In: ACS Sustainable Chemistry and Engineering, Vol. 7, No. 15, 05.08.2019, p. 12938-12947.

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