Phosphorene as Cathode Material for High-Voltage, Anti-Self-Discharge Zinc Ion Hybrid Capacitors

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

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Detail(s)

Original languageEnglish
Article number2001024
Number of pages10
Journal / PublicationAdvanced Energy Materials
Volume10
Issue number24
Online published7 May 2020
Publication statusPublished - 23 Jun 2020

Abstract

Output voltage and self-discharge rate are two important performance indices for supercapacitors, which have long been overlooked, though these play a very significant role in their practical application. Here, a zinc anode is used to construct a zinc ion hybrid capacitor. Expanded operating voltage of the hybrid capacitor is obtained with novel electrolytes. In addition, significantly improved anti-self-discharge ability is achieved. The phosphorene-based zinc ion capacitor exploiting a "water in salt" electrolyte with a working potential can reach 2.2 V, delivering 214.3 F g-1 after 5000 cycles. The operating voltage is further extended to 2.5 V through the use of an organic solvent as the electrolyte; the solvent is prepared by adding 0.2 m ZnCl2 into the tetraethylammonium tetrafluoroborate in propylene carbonate (Et4NBF4/PC) solvent, and it exhibits 105.9 F g-1 even after 9500 cycles. More importantly, the phosphorene-based capacitors possess excellent anti-self-discharge performance. The capacitors retain 76.16% of capacitance after resting for 300 h. The practical application of the zinc ion capacitor is demonstrated through a flexible paper-based printed microcapacitor. It is believed that the developed zinc ion capacitor can effectively resolve the severe self-discharge problem of supercapacitors. Moreover, high-voltage zinc ion capacitors provide more opportunities for the application of supercapacitors.

Research Area(s)

  • anti-self-discharge, high voltage, phosphorene, zinc ion capacitors

Citation Format(s)

Phosphorene as Cathode Material for High-Voltage, Anti-Self-Discharge Zinc Ion Hybrid Capacitors. / Huang, Zhaodong; Chen, Ao; Mo, Funian; Liang, Guojin; Li, Xinliang; Yang, Qi; Guo, Ying; Chen, Ze; Li, Qing; Dong, Binbin; Zhi, Chunyi.

In: Advanced Energy Materials, Vol. 10, No. 24, 2001024, 23.06.2020.

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