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<p>The Li<sub>2</sub>FeTiO<sub>4</sub> cathode has become a promising choice for sodium-ion batteries due to its remarkable capacity and environmental friendliness. Except for its terrible conductivity, the optimization of the preparation process and cost considerations are also urgent issues to be addressed. A set of three-factor, three-level orthogonal experiments were conducted, including the secondary calcination temperature, calcination time, and molar ratio of raw materials. And the single-factor experiment was adopted to further perfect temperature. Finally, the optimal synthesis conditions were obtained as follows: secondary calcination temperature was 650&#xa0;°C, calcination time was 8&#xa0;h, and molar ratio of raw materials was 1.25:1. A Li<sub>2</sub>FeTiO<sub>4</sub> was synthesized by the sol–gel method. Under these optimized conditions, Li<sub>2</sub>FeTiO<sub>4</sub> cathode could yield remarkable cycle stability (69.7% over 30 cycles) and rate performance (81.3 mAh g<sup>−1</sup>, 73.2% of initial capacities). These findings provide strong evidence that Li<sub>2</sub>FeTiO<sub>4</sub> could be effectively utilized with outstanding performance, which might offer valuable insights for the future adoption of Li<sub>2</sub>FeTiO<sub>4</sub> cathode materials.</p>

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Facile design and synthesis of Li2FeTiO4 as advanced cathode material for lithium-ion batteries

  • 期刊论文

  • 发表日期：

    2025年1月11日

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

摘要

The Li2FeTiO4 cathode has become a promising choice for sodium-ion batteries due to its remarkable capacity and environmental friendliness. Except for its terrible conductivity, the optimization of the preparation process and cost considerations are also urgent issues to be addressed. A set of three-factor, three-level orthogonal experiments were conducted, including the secondary calcination temperature, calcination time, and molar ratio of raw materials. And the single-factor experiment was adopted to further perfect temperature. Finally, the optimal synthesis conditions were obtained as follows: secondary calcination temperature was 650 °C, calcination time was 8 h, and molar ratio of raw materials was 1.25:1. A Li2FeTiO4 was synthesized by the sol–gel method. Under these optimized conditions, Li2FeTiO4 cathode could yield remarkable cycle stability (69.7% over 30 cycles) and rate performance (81.3 mAh g−1, 73.2% of initial capacities). These findings provide strong evidence that Li2FeTiO4 could be effectively utilized with outstanding performance, which might offer valuable insights for the future adoption of Li2FeTiO4 cathode materials.