Tailoring morphology of pure terephthalic acid induced beta nickel hydroxide using ultrasonication and alkalization for efficient energy storage

Tsung Rong Kuo, Shih Chia Yen, Subbiramaniyan Kubendhiran, Sibidou Yougbaré, Lu Yin Lin, Yung Fu Wu

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

β-Ni(OH)2 is one of the effective battery-type active materials of battery supercapacitor hybrid (BSH). Two-dimensional structure can supply large surface area for conducting redox reactions and abundant open spaces for ion diffusion. It is promising to design favorable morphology of β-Ni(OH)2 as the active material of BSH. In this study, the novel β-Ni(OH)2 layered structure decorated with nanoparticles is synthesize on a nickel foam using the hydrothermal process and post treatments. Pure terephthalic acid is verified to be indispensable for synthesizing nickel metal organic framework (Ni-MOF) in the hydrothermal process. Ultrasonication is used to break the large accordion-like structure of Ni-MOF into small pieces. Alkalization is applied to fully convert Ni-MOF into β-Ni(OH)2. Better electrochemical performance is achieved for β-Ni(OH)2 synthesized from Ni-MOF, which presents the largest specific capacitance (CF) of 1171 F/g at 3 A/g. A BSH is assembled using the Ni-MOF derived β-Ni(OH)2 on a nickel foam as the positive electrode and the activated carbon on a nickel foam as the negative electrode. The maximum energy density of 6.50 Wh/kg at 0.14 kW/kg, and excellent cyclic stability with the CF retention of 82% and Coulombic efficiency higher than 96% after 8000 charge/discharge cycles are achieved for the BSH.

Original languageEnglish
Article number106117
JournalJournal of Energy Storage
Volume56
DOIs
Publication statusPublished - Dec 2022

Keywords

  • Alkalization
  • Battery supercapacitor hybrid
  • Metal organic framework
  • Pure terephthalic acid
  • Ultrasonication
  • β-Ni(OH)

ASJC Scopus subject areas

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

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