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<p>Bimetallic Fe-Co disulfide with single phase generally represents enhanced thermal battery performances. In this work, binary iron-cobalt disulfide (FeCoS<sub>2</sub>) is synthesized via high-temperature thermal sintering of sulfur and coprecipitated precursor. The as-prepared FeCoS<sub>2</sub> possesses nanosized particles with single phase. The uniform distribution of Fe and Co atoms induces strong synergistic effect, significantly improving the thermal stability and electrochemical performances of FeCoS<sub>2</sub>. At a current density of 100&#xa0;mA cm<sup>-2</sup> and a cut-off voltage of 1.4&#xa0;V, the discharge capacity of FeCoS<sub>2</sub> reaches to 626.3 mAh g<sup>-1</sup>, which is higher than that of the corresponding mono-disulfides and their physical mixture. These findings indicate that the present FeCoS<sub>2</sub> is suitable to be used as cathode material for high-performance thermal battery, which also provides valuable insight for the preparation of multi-metallic disulfides.</p>

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Bimetallic iron-cobalt disulfide as efficient cathode material for high-performance thermal batteries

  • 期刊论文

  • 发表日期：

    2026年6月20日

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  • Min Kang,
  • Shaoming Qiao,
  • Hui Yang,
  • Zhipeng Zhao,
  • Zhaobao Fan,
  • Hai Zhou

摘要

Bimetallic Fe-Co disulfide with single phase generally represents enhanced thermal battery performances. In this work, binary iron-cobalt disulfide (FeCoS2) is synthesized via high-temperature thermal sintering of sulfur and coprecipitated precursor. The as-prepared FeCoS2 possesses nanosized particles with single phase. The uniform distribution of Fe and Co atoms induces strong synergistic effect, significantly improving the thermal stability and electrochemical performances of FeCoS2. At a current density of 100 mA cm-2 and a cut-off voltage of 1.4 V, the discharge capacity of FeCoS2 reaches to 626.3 mAh g-1, which is higher than that of the corresponding mono-disulfides and their physical mixture. These findings indicate that the present FeCoS2 is suitable to be used as cathode material for high-performance thermal battery, which also provides valuable insight for the preparation of multi-metallic disulfides.