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<p>P2-type Na<sub>0.67</sub>Mn<sub>0.6</sub>Ni<sub>0.3</sub>Ti<sub>0.1</sub>O<sub>2</sub> is synthesized via a sol–gel method and its electrochemical performance is investigated as a cathode material for sodium-ion batteries (SIBs) employing both a Na<sub>3</sub>Zr<sub>2</sub>Si<sub>2</sub>PO<sub>12</sub> solid electrolyte and an organic liquid electrolyte. In the liquid electrolyte cells, the Na<sub>0.67</sub>Mn<sub>0.6</sub>Ni<sub>0.3</sub>Ti<sub>0.1</sub>O<sub>2</sub> cathode exhibits a high discharge capacity of 87.5&#xa0;mAh&#xa0;g<sup>−1</sup>, with a capacity retention of 73.2% after 500 cycles at 0.1&#xa0;C (10&#xa0;mA&#xa0;g<sup>−1</sup>), while in the solid electrolyte cells, a higher discharge capacity of 94.5&#xa0;mAh&#xa0;g<sup>−1</sup> at 0.1&#xa0;C and an improved high-rate capacity of 70.8&#xa0;mAh&#xa0;g<sup>−1</sup> at 2&#xa0;C are demonstrated. Moreover, stable charge/discharge cycles are observed in the solid electrolyte cells, with a discharge capacity of 75.3&#xa0;mAh&#xa0;g<sup>−1</sup> and a retention of 60.7% over 100 cycles at 1&#xa0;C. This work highlights the substantial effect of the electrolyte conditions on the performance of layered oxide cathode materials, providing potential strategies to overcome current challenges for high-performance SIBs.</p> Graphical abstract <p></p>

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P2-type Na0.67Mn0.6Ni0.3Ti0.1O2 as cathode material for sodium-ion batteries: solid electrolyte versus liquid electrolyte

  • 期刊论文

  • 发表日期：

    2025年5月24日

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  • Shiyin Bai,
  • Qing Ni,
  • Shuaishuai Yang,
  • Debao Fang,
  • Jingxin He,
  • Lai Chen,
  • Yuefeng Su,
  • Haibo Jin,
  • Chengzhi Wang

摘要

P2-type Na0.67Mn0.6Ni0.3Ti0.1O2 is synthesized via a sol–gel method and its electrochemical performance is investigated as a cathode material for sodium-ion batteries (SIBs) employing both a Na3Zr2Si2PO12 solid electrolyte and an organic liquid electrolyte. In the liquid electrolyte cells, the Na0.67Mn0.6Ni0.3Ti0.1O2 cathode exhibits a high discharge capacity of 87.5 mAh g−1, with a capacity retention of 73.2% after 500 cycles at 0.1 C (10 mA g−1), while in the solid electrolyte cells, a higher discharge capacity of 94.5 mAh g−1 at 0.1 C and an improved high-rate capacity of 70.8 mAh g−1 at 2 C are demonstrated. Moreover, stable charge/discharge cycles are observed in the solid electrolyte cells, with a discharge capacity of 75.3 mAh g−1 and a retention of 60.7% over 100 cycles at 1 C. This work highlights the substantial effect of the electrolyte conditions on the performance of layered oxide cathode materials, providing potential strategies to overcome current challenges for high-performance SIBs.

Graphical abstract