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<p>Li<sub>2</sub>FeTiO<sub>4</sub> cathode has emerged as a promising option for lithium-ion batteries because of its outstanding capacity and eco-friendly properties. However the abominable conductivity and ion transports hindered its electrochemical performance. In this work, (Li<sub>1-x</sub>K<sub>x</sub>)<sub>2</sub>FeTiO<sub>4</sub> (LiFT-Kx, <i>x</i> = 0 and 0.01) cathode materials with were successfully synthesized. Remarkably, there was a notable improvement in the properties of interlayer spacing, ionic conductivity and kinetics. As a result, LiFT-K0.01 cathode expressed splendid initial capacitance (108.8 mAh g<sup>−1</sup>, 0.05 C), stability (82.9% over 30 cycles), and rate performance (89.8 mAh g<sup>−1</sup>, 82.4% of the original values). This work might provide valuable insights for the exploration of lithium storage with excellent long-term stability, and it might open new possibilities for the development of advanced energy storage technologies based on lithium-ion batteries.</p>

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K-doped Li2FeTiO4 cathode with enhanced structural stability for lithium-ion batteries

  • 期刊论文

  • 发表日期：

    2025年4月16日

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  • Peng-qing Hou,
  • Yingdong Qu,
  • Rui Huang,
  • Xinru Tian,
  • Guanglong Li,
  • Shaohua Luo

摘要

Li2FeTiO4 cathode has emerged as a promising option for lithium-ion batteries because of its outstanding capacity and eco-friendly properties. However the abominable conductivity and ion transports hindered its electrochemical performance. In this work, (Li1-xKx)2FeTiO4 (LiFT-Kx, x = 0 and 0.01) cathode materials with were successfully synthesized. Remarkably, there was a notable improvement in the properties of interlayer spacing, ionic conductivity and kinetics. As a result, LiFT-K0.01 cathode expressed splendid initial capacitance (108.8 mAh g−1, 0.05 C), stability (82.9% over 30 cycles), and rate performance (89.8 mAh g−1, 82.4% of the original values). This work might provide valuable insights for the exploration of lithium storage with excellent long-term stability, and it might open new possibilities for the development of advanced energy storage technologies based on lithium-ion batteries.