Compacting Electric Double Layer Enables Carbon Electrode with Ultrahigh Zn Ion Storage Capability

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Xin Shi
  • Jinhao Xie
  • Fan Yang
  • Fuxin Wang
  • Dezhou Zheng
  • Xianshuo Cao
  • Yanxia Yu
  • Xihong Lu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article numbere202214773
Journal / PublicationAngewandte Chemie - International Edition
Volume61
Issue number51
Online published27 Oct 2022
Publication statusPublished - 19 Dec 2022

Abstract

Carbon-based cathodes for aqueous zinc ion hybrid supercapacitors (ZHSCs) typically undergo low Zn ion storage capability due to their electric double layer capacitance (EDLC) energy storage mechanism that is restricted by specific surface area and thickness of electric double layer (EDL). Here, we report a universal surface charge modulation strategy to effectively enhance the capacitance of carbon materials by decreasing the thickness of EDL. Amino groups with lone pair electrons were chosen to increase the surface charge density and enhanced the interaction between carbon electrode and Zn ions, thus effectively compacting the EDL. Consequently, amino functionalized porous carbon based ZHSCs can deliver an ultrahigh capacity of 255.2 mAh g−1 along with excellent cycling stability (95.5 % capacity retention after 50 000 cycles) in 1 M ZnCl2 electrolyte. This study demonstrates the feasibility of EDL modified carbon as Zn2+ storage cathode and great prospect for constructing high performance ZHSCs.

Research Area(s)

  • Amino Functional Groups, Aqueous Zn Ion Hybrid Supercapacitor, Carbon Electrode, Electric Double Layer, Surface Charge Modulation

Citation Format(s)

Compacting Electric Double Layer Enables Carbon Electrode with Ultrahigh Zn Ion Storage Capability. / Shi, Xin; Xie, Jinhao; Yang, Fan et al.
In: Angewandte Chemie - International Edition, Vol. 61, No. 51, e202214773, 19.12.2022.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review