Hierarchical rod-like structure MnO2/NiCo-layered double hydroxide on nickel foam for a high-performance supercapacitor electrode

Tribidasari A. Ivandini, Fathiya F. Ulfah, Dinda P.N. Nahda, Sadewo P. Luhur, Afiten R. Sanjaya, Yuni K. Krisnandi, Afriyanti Sumboja, Anne Zulfia, Kwang Sun Ryu, Zico A. Akbar

Research output: Contribution to journalArticlepeer-review

Abstract

Nickel foam (NF) surface was successfully modified to produce a hierarchical structure MnO2-modified NiCo-layered double hydroxide (MnO2/NiCo-LDH) for a high-performance supercapacitor. A two-step hydrothermal method was applied, including the synthesis of hierarchical one-dimension NiCo-carbonate onto NF, followed by the synthesis of MnO2. The characterization results showed the growth of nanoneedle-like NiCo-carbonate particles perpendicular on the NF surface covered with δ-MnO2. MnO2 attachment disrupted the nanoneedles structure forming the hierarchical rod shapes and changing the structure of NiCo carbonate to NiCo-LDH. This change significantly increases the material's electroactive surface area and enhances the specific capacitance. At 1 A g−1 current density, the specific capacitance of 2572.73 F g−1 was achieved, which is substantially higher than those of NiCo/NF and MnO2/NF. Furthermore, good stability was shown by 10,000 repetitive charge-discharge cycles (at 20 A g−1) with a specific capacity retention of 78.95 % indicating that the developed material was suitable for supercapacitors.

Original languageEnglish
Article number113289
JournalMaterials Research Bulletin
Volume184
DOIs
Publication statusPublished - Apr 2025

Keywords

  • 1-D structure
  • High specific capacitance
  • MnO
  • NiCo-LDH
  • Surface modification

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