Synthesis of dandelion-like bimetallic nickel‑cobalt metal-organic framework as an efficient cathode for high-performance asymmetric supercapacitors

Chii Rong Yang, Yu Chiao Li, Chia Hung Chen, Ching Tang Lin, Jeng Yu Lin*, Mao Jung Huang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

This study employed pyromellitic acid (PMA) to synthesize a NiCo metal-organic framework (MOF) for supercapacitors. The resultant, NiCo-MOF (PMA), revealed a dandelion-like structure with a surface area reaching 500.7 m2 g−1. At the current density of 1 A g−1, the NiCo-MOF (PMA) produced an impressive specific capacitance value of 918.8 F g−1. It retained 61.1 % of the capacitance obtained at 1 A g−1 even after increasing the current density to 10 A g−1. Moreover, the 64.3 % capacitance retention was achieved even after 10,000 cycles of charging/discharging at 10 A g−1. More importantly, the asymmetric supercapacitor (ASC) based on the NiCo-MOF (PMA) cathode demonstrated a specific capacitance of 83.47 F g−1 at 0.5 A g−1, and 80.34 % of its initial capacitance was still maintained after 5000 cycles at 5 A g−1. The ASC delivered an energy density of 23.88 Wh kg−1 at a power density of 750 W kg−1. Two ASCs in a series successfully powered 120 green LED lights for 21 min, illustrating its potential practical applications.

Original languageEnglish
Article number108663
JournalJournal of Energy Storage
Volume72
DOIs
Publication statusPublished - 2023 Nov 30

Keywords

  • Bimetallic
  • Cathode
  • High specific surface area
  • Metal-organic framework
  • Pyromellitic acid
  • Supercapacitor

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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