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<p>Low-cost manganese-based oxides as promising cathodes for sodium-ion batteries still face significant challenges, including irreversible phase transition, air/water sensitivity, and low initial charge capacity. Herein, we precisely design a titanium-substituted Mn-based oxide cathode material with optimized local electronic structure distribution through a stepwise screening mechanism based on theoretical calculations, which enables suppression of irreversible phase transition and Jahn-Teller distortion by exerting spring effect and pinning effect. Notably, the optimized cathode fabricated using an aqueous binder exhibits stable electrochemical performance, retaining 96.16 % of its capacity after 500 cycles at 1 A g<sup>−1</sup>, along with reliable air/water stability under prolonged exposure, which is further confirmed by advanced characterization and theoretical calculations. In addition, Prussian blue analogs are proposed as a sodium supplement for full cell applications. The large-scale production and implementation of composite cathode materials have been successfully achieved and subsequently applied in practical pouch cells with non-presodiated hard carbon anodes. This work investigates an air/water-stable Mn-based layered oxide cathode for sodium-ion batteries, providing insights relevant to their future industrial development.</p>

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Design principles of practical industrial-scale layered oxide cathodes with air/water stability for sustainable sodium-ion batteries

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月25日

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  • Xin-Bei Jia,
  • Qian-Qian Peng,
  • Yi-Feng Liu,
  • Dian-Cheng Chen,
  • Jingqiang Wang,
  • Jia-Yang Li,
  • Yan-Fang Zhu,
  • Neng-Hua Xu,
  • Ling-Yi Kong,
  • Han-Xiao Liu,
  • Guang-Yu Zhang,
  • Zhuang-Chun Jian,
  • Chen Cheng,
  • Hang-Hang Dong,
  • Liang Zhang,
  • Yang Sun,
  • Shuang-Qiang Chen,
  • Xiao-Dong Guo,
  • Shixue Dou,
  • Yao Xiao

摘要

Low-cost manganese-based oxides as promising cathodes for sodium-ion batteries still face significant challenges, including irreversible phase transition, air/water sensitivity, and low initial charge capacity. Herein, we precisely design a titanium-substituted Mn-based oxide cathode material with optimized local electronic structure distribution through a stepwise screening mechanism based on theoretical calculations, which enables suppression of irreversible phase transition and Jahn-Teller distortion by exerting spring effect and pinning effect. Notably, the optimized cathode fabricated using an aqueous binder exhibits stable electrochemical performance, retaining 96.16 % of its capacity after 500 cycles at 1 A g−1, along with reliable air/water stability under prolonged exposure, which is further confirmed by advanced characterization and theoretical calculations. In addition, Prussian blue analogs are proposed as a sodium supplement for full cell applications. The large-scale production and implementation of composite cathode materials have been successfully achieved and subsequently applied in practical pouch cells with non-presodiated hard carbon anodes. This work investigates an air/water-stable Mn-based layered oxide cathode for sodium-ion batteries, providing insights relevant to their future industrial development.