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<p>The performance of lithium-ion batteries (LiBs) hinges critically on anode materials, yet developing low-cost, high-performance alternatives remain challenging. Herein, a sustainable and globally abundant marine “bio-pollutant” <i>Ulva prolifera</i> (<i>UP</i>) supported Fe<sub>3</sub>O<sub>4</sub> (Fe<sub>3</sub>O<sub>4</sub>/UPC) composite anode is simply constructed via in-situ hydrothermal and post-annealing process, where Fe<sup>3+</sup> acts as both reactant and morphology-directing agent. The spherical/particle architecture of Fe<sub>3</sub>O<sub>4</sub>/UPC affords a compact yet porous structure that facilitates rapid Li<sup>+</sup> transport, thereby enhancing the ion diffusion kinetics and overall electrochemical performance of the battery. The resulting electrode delivers a high initial discharge capacity of 1123 mAh g<sup>-1</sup> at 1.0&#xa0;A g<sup>-1</sup> and retains 960 mAh g<sup>-1</sup> after 700 cycles. This work not only presents a cost-effective route to high-capacity LIB anodes but also transforms ecological waste into functional energy materials, offering a dual solution for environmental remediation and advanced battery design.</p>

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Spherical/nanoparticle ferroferric oxide on ulva prolifera–derived carbon for high-performance lithium-ion batteries

  • 期刊论文

  • 发表日期：

    2026年5月8日

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  • Xiaopeng Zou,
  • Qiying Yang,
  • Shuo Xie,
  • Qi Wang,
  • Wenjiao Wang,
  • Lanju Sun,
  • Jie Wang,
  • Dongqi Dong,
  • Liangyu Gong

摘要

The performance of lithium-ion batteries (LiBs) hinges critically on anode materials, yet developing low-cost, high-performance alternatives remain challenging. Herein, a sustainable and globally abundant marine “bio-pollutant” Ulva prolifera (UP) supported Fe3O4 (Fe3O4/UPC) composite anode is simply constructed via in-situ hydrothermal and post-annealing process, where Fe3+ acts as both reactant and morphology-directing agent. The spherical/particle architecture of Fe3O4/UPC affords a compact yet porous structure that facilitates rapid Li+ transport, thereby enhancing the ion diffusion kinetics and overall electrochemical performance of the battery. The resulting electrode delivers a high initial discharge capacity of 1123 mAh g-1 at 1.0 A g-1 and retains 960 mAh g-1 after 700 cycles. This work not only presents a cost-effective route to high-capacity LIB anodes but also transforms ecological waste into functional energy materials, offering a dual solution for environmental remediation and advanced battery design.