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<p>P2-type manganese base layered oxides are considered as a potential cathode material for sodium-ion batteries. However, they are prone to phase transitions that lead to structural instability of the material and limit the reversible capacity. Hence, layered self-assembled microsphere type Na<sub>0.7</sub>Mn<sub>0.6</sub>Ni<sub>0.3</sub>Co<sub>0.1</sub>O<sub>2</sub>(MNC-3) cathodes were synthesized to enhance the performance of sodium-ion batteries by morphology control strategy. The incorporation of benzoic acid as an organic compound leverages molecular design strategies to modify intermolecular interactions and increase interlayer spacing. This self-assembled layered spherical structure enhances the contact area between the electrode and electrolyte, thereby improving sodium ion transport efficiency. As a cathode material for sodium-ion batteries, it displays a high initial capacity of 200.12&#xa0;mAh/g at 26&#xa0;mA/g in the voltage window of 1.5–4.1&#xa0;V and an excellent capacity retention rate of 81% after 100 cycles. Our study provides a simple and effective method of morphology control strategy for the design of promising sodium-ion batteries with cathode layered structure.</p>

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Boosting the electrochemical performance of P2- Na0.7Mn0.6Ni0.3Co0.1O2 cathode materials via morphological control

  • 期刊论文

  • 发表日期：

    2025年1月24日

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  • Shouman Chen,
  • Hao Chen,
  • Yong Li

摘要

P2-type manganese base layered oxides are considered as a potential cathode material for sodium-ion batteries. However, they are prone to phase transitions that lead to structural instability of the material and limit the reversible capacity. Hence, layered self-assembled microsphere type Na0.7Mn0.6Ni0.3Co0.1O2(MNC-3) cathodes were synthesized to enhance the performance of sodium-ion batteries by morphology control strategy. The incorporation of benzoic acid as an organic compound leverages molecular design strategies to modify intermolecular interactions and increase interlayer spacing. This self-assembled layered spherical structure enhances the contact area between the electrode and electrolyte, thereby improving sodium ion transport efficiency. As a cathode material for sodium-ion batteries, it displays a high initial capacity of 200.12 mAh/g at 26 mA/g in the voltage window of 1.5–4.1 V and an excellent capacity retention rate of 81% after 100 cycles. Our study provides a simple and effective method of morphology control strategy for the design of promising sodium-ion batteries with cathode layered structure.