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<p>Nickel–Zinc (Ni–Zn) batteries are attractive as a potential alternative to conventional lithium-ion batteries due to their cost-effectiveness and environmental benefits. This study explores the fabrication of a flexible electrode using nickel hydroxide (Ni(OH)<sub>2</sub>) that is electrochemically deposited on a Buckypaper and polydimethylsiloxane (BP@PDMS) substrate. The electrodeposition condition is optimized by varying applied current density (− 1, − 1.5, and − 2&#xa0;mA/cm<sup>2</sup>), and − 1.5&#xa0;mA/cm<sup>2</sup> condition yields the highest specific capacity of 0.2 mAh/cm<sup>2</sup>. According to spectroscopic and optical analyses, when − 1.5&#xa0;mA/cm<sup>2</sup> is applied, Ni(OH)<sub>2</sub> is properly deposited on the BP@PDMS electrode, inducing a high specific capacity. Furthermore, Ni(OH)<sub>2</sub>/BP@PDMS cathode is compared with (i) Ni foil cathode, and (ii) untreated BP@PDMS cathode to demonstrate its superior redox reaction, capacity, and stability. Despite minor capacity decay of Ni–Zn battery occurring for a long cycle test, the findings suggest that Ni–Zn batteries are suitable for portable electronic devices and offer a promising alternative to existing battery technologies.</p>

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Fabrication of Flexible Nickel Hydroxide Electrode for Nickel–Zinc Battery

  • 期刊论文

  • 发表日期：

    2025年10月3日

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  • Joonyoung Lee,
  • Semi Lim,
  • Yongchai Kwon

摘要

Nickel–Zinc (Ni–Zn) batteries are attractive as a potential alternative to conventional lithium-ion batteries due to their cost-effectiveness and environmental benefits. This study explores the fabrication of a flexible electrode using nickel hydroxide (Ni(OH)2) that is electrochemically deposited on a Buckypaper and polydimethylsiloxane (BP@PDMS) substrate. The electrodeposition condition is optimized by varying applied current density (− 1, − 1.5, and − 2 mA/cm2), and − 1.5 mA/cm2 condition yields the highest specific capacity of 0.2 mAh/cm2. According to spectroscopic and optical analyses, when − 1.5 mA/cm2 is applied, Ni(OH)2 is properly deposited on the BP@PDMS electrode, inducing a high specific capacity. Furthermore, Ni(OH)2/BP@PDMS cathode is compared with (i) Ni foil cathode, and (ii) untreated BP@PDMS cathode to demonstrate its superior redox reaction, capacity, and stability. Despite minor capacity decay of Ni–Zn battery occurring for a long cycle test, the findings suggest that Ni–Zn batteries are suitable for portable electronic devices and offer a promising alternative to existing battery technologies.