Zeolitic imidazolate framework-L-assisted synthesis of inorganic and organic anion-intercalated hetero-trimetallic layered double hydroxide sheets as advanced electrode materials for aqueous asymmetric super-capacitor battery

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

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Author(s)

  • Yang Li
  • Xun Zhao
  • Ziyang Luo
  • Shunfei Liang
  • Huizhen Qin
  • Lingyun Chen

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number231149
Journal / PublicationJournal of Power Sources
Volume527
Online published23 Feb 2022
Publication statusPublished - 15 Apr 2022

Abstract

Fine-tuning the interlayer space and composition of the layered double hydroxide (LDH) is a promising strategy to obtain high-performance battery-type electrode materials for super-capacitor battery. In this work, a series of two-dimensional (2D) porous hetero-trimetallic Zinc-Nickel-Cobalt LDHs sheets intercalated with nitrate anion and different Zn/Ni ratios (ZnxNi1-xCo-LDH-NO3, x = 0, 0.25, 0.5, 0.75, and 1.0) are firstly synthesized through a Zeolitic imidazolate framework-L (ZIF-L)-assisted co-precipitation reaction and ion etching procedure. Among which, the Zn0.25Ni0.75Co-LDH-NO3 electrode, with a Zn/Ni ratio of 1:3, provides a high specific capacity (275 mAh g−1 at 1 A g−1). To further tune the interlayer space, Zn0.25Ni0.75Co-LDH-BA/AA (BA = benzoate anion and AA = acetate anion) sheets intercalated with BA or AA are synthesized by an anion-exchange method. A super-capacitor battery device (Zn0.25Ni0.75Co-LDH-BA//activated carbon) using Zn0.25Ni0.75Co-LDH-BA as the positive electrode can achieve a high energy density (51.8 Wh kg−1 at 789 W kg−1) and superb durability (94.6% over 10,000 cycles). This work can shed light on regulating the interlayer space of LDHs for advanced electrochemical energy storage applications.

Research Area(s)

  • Anion-intercalation materials, Aqueous asymmetric supercapacitor, Thin sheet microstructure, Two-dimensional materials, ZnNiCo ternary layered double hydroxide

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