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<p>The development of high-capacity and long-cycle-life anode materials is crucial for advancing lithium-ion battery technology. Prussian blue analogs (PBAs) and their derived mixed metal oxides (MMOs) have shown great potential due to their structural tunability and high theoretical capacity. In this work, Ni/Co/Fe-PBA precursors were synthesized via a facile co-precipitation method and subsequently calcined to form ternary metal oxide nanocubes (Ni/Co/Fe-Oxide). A binary counterpart (Co/Fe-Oxide) was also prepared under identical conditions for comparison. The ternary material exhibits a unique hollow nanocube architecture with hierarchical porosity, whereas the binary oxide displays solid nanocube aggregates. Electrochemical tests reveal that the ternary anode delivers a high initial discharge capacity of 526 mAh g⁻¹ and maintains 275 mAh g⁻¹ after 50 cycles at 0.1&#xa0;A g⁻¹, significantly outperforming the binary anode (381 mAh g⁻¹ initially, 173 mAh g⁻¹ after 50 cycles). The ternary material also demonstrates superior rate capability and cycling stability, attributed to its hollow structure that effectively accommodates volume expansion, shortens Li⁺ diffusion paths, and provides abundant active sites. This study highlights the importance of ternary composition and morphology control in designing high-performance PBA-derived anodes for next-generation lithium-ion batteries.</p>

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Microstructure regulation and electrochemical performance of spinel Ni/Co/Fe-Oxide as anode material for lithium-ion batteries

  • 期刊论文

  • 发表日期：

    2026年3月18日

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  • Wei Yu,
  • Tingting Huo

摘要

The development of high-capacity and long-cycle-life anode materials is crucial for advancing lithium-ion battery technology. Prussian blue analogs (PBAs) and their derived mixed metal oxides (MMOs) have shown great potential due to their structural tunability and high theoretical capacity. In this work, Ni/Co/Fe-PBA precursors were synthesized via a facile co-precipitation method and subsequently calcined to form ternary metal oxide nanocubes (Ni/Co/Fe-Oxide). A binary counterpart (Co/Fe-Oxide) was also prepared under identical conditions for comparison. The ternary material exhibits a unique hollow nanocube architecture with hierarchical porosity, whereas the binary oxide displays solid nanocube aggregates. Electrochemical tests reveal that the ternary anode delivers a high initial discharge capacity of 526 mAh g⁻¹ and maintains 275 mAh g⁻¹ after 50 cycles at 0.1 A g⁻¹, significantly outperforming the binary anode (381 mAh g⁻¹ initially, 173 mAh g⁻¹ after 50 cycles). The ternary material also demonstrates superior rate capability and cycling stability, attributed to its hollow structure that effectively accommodates volume expansion, shortens Li⁺ diffusion paths, and provides abundant active sites. This study highlights the importance of ternary composition and morphology control in designing high-performance PBA-derived anodes for next-generation lithium-ion batteries.