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<p>Solid-state lithium batteries (SSLBs) are considered the most promising alternative to conventional lithium-ion batteries due to their superior energy density, power output, and enhanced safety. Among SSLBs, oxide-based systems stand out for their wide electrochemical window, excellent thermal stability, and low cost, making them strong candidates for future commercialization. However, the inherent rigidity of oxide solid electrolytes often leads to poor interfacial contact and high resistance within composite cathodes, limiting performance. In this study, we present a core–shell structured LFP-LATP composite cathode designed to maintain effective contact between the active material (LFP) and solid electrolyte (LATP) during cycling. Optimal electrochemical performance was observed when content of LATP was 15%, and the cell delivered an initial discharge capacity of 140 mAhg<sup>−1</sup> and retained 90.6% of its capacity after 10 cycles. This performance significantly surpasses that of a cathode made by simple mixing of 15% LATP with 85% LFP, which retained only 66.2% capacity after 10 cycles.</p>

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Core LFP—shell LATP composite as cathode material for solid-state-Li batteries

  • 期刊论文

  • 发表日期：

    2026年2月5日

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  • Jiayun Lei,
  • Tatiana K. Zakharchenko,
  • Egor. A. Sedov,
  • Sergey V. Maksimov,
  • Lada V. Yashina

摘要

Solid-state lithium batteries (SSLBs) are considered the most promising alternative to conventional lithium-ion batteries due to their superior energy density, power output, and enhanced safety. Among SSLBs, oxide-based systems stand out for their wide electrochemical window, excellent thermal stability, and low cost, making them strong candidates for future commercialization. However, the inherent rigidity of oxide solid electrolytes often leads to poor interfacial contact and high resistance within composite cathodes, limiting performance. In this study, we present a core–shell structured LFP-LATP composite cathode designed to maintain effective contact between the active material (LFP) and solid electrolyte (LATP) during cycling. Optimal electrochemical performance was observed when content of LATP was 15%, and the cell delivered an initial discharge capacity of 140 mAhg−1 and retained 90.6% of its capacity after 10 cycles. This performance significantly surpasses that of a cathode made by simple mixing of 15% LATP with 85% LFP, which retained only 66.2% capacity after 10 cycles.