Polyoxometalate-Incorporated Host-Guest Framework Derived Layered Double Hydroxide Composites for High-Performance Hybrid Supercapacitor

Yanan Zhang*, Junlei Chen, Fazal Razq, Chenyang Su, Xuehan Hou, Wenhuan Huang*, Huabin Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Metal organic frameworks have been employed as high-performance layered double hydroxide (LDH) composite supercapacitor electrode materials but have shown unsatisfactory redox ability and stability. Herein, a host-guest CuMo-based polyoxometalate-based metal organic framework (POMOF) with copious electrochemically active sites and strong electrochemical redox activities has been effectively coupled with POM-incorporated CoNi-LDH to develop a nanocomposite (NENU-5@CoNi-LDH) by a simple solvothermal method. The designed electrode shows a high specific capacity of 333.61 mAh·g–1 at 1 A·g–1. In addition, the novel hybrid symmetric supercapacitor NENU-5@CoNi-LDH/active carbon (AC) demonstrated a high energy density of 80.8 Wh·kg–1 at a power density of 750.7 W·kg–1. Interestingly, the nanocomposite of NENU-5@CoNi-LDH exhibits an outstanding capacitance retention of 79% after 5000 charge-discharge cycles at 10 A·g–1. This work provides a new strategy and will be the backbone for future energy storage research.

Original languageEnglish (US)
Pages (from-to)75-82
Number of pages8
JournalChinese Journal of Chemistry
Volume41
Issue number1
DOIs
StatePublished - Jan 1 2023

Keywords

  • High stability
  • Layered double hydroxide
  • Multi-electron redox
  • Polyoxometalate-based metal organic framework
  • Supercapacitor

ASJC Scopus subject areas

  • General Chemistry

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