Scholarlink

<p>P2-type layered manganese-based oxides are promising cathode candidates for sodium-ion batteries due to their high energy density and low cost. However, their practical application is limited by slow ion kinetics and severe Jahn–Teller distortion. In this study, we address these challenges through surface engineering by applying a 6nm Na<sub>3</sub>PO<sub>4</sub> coating to pre-synthesized P2-Na<sub>0.67</sub>Ni<sub>0.3</sub>Mn<sub>0.6</sub>Co<sub>0.1</sub>O<sub>2</sub> (NMC). The optimized 3 wt% Na<sub>3</sub>PO<sub>4</sub>-coated NMC demonstrates remarkable electrochemical performance, delivering specific capacity of 161&#xa0;mA&#xa0;h&#xa0;g<sup>−1</sup> at 0.1 C. Rate capability tests reveal superior performance (61&#xa0;mA&#xa0;h&#xa0;g<sup>−1</sup> at 10 C) compared to the unmodified counterparts. Long-term cycling stability shows capacity retention rates of 90.9% (3 wt%) and 83% (5 wt%) after 100 cycles, significantly outperforming the 53.9% retention of bare NMC. These findings establish Na<sub>3</sub>PO<sub>4</sub> surface modification as an effective strategy for developing high-performance sodium-ion battery cathodes.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Ionic Conductive Na3PO4 Coating P2-Na0.67Ni0.3Mn0.6Co0.1O2 to Generate Stable Cathodes for Sodium-Ion Batteries

  • 期刊论文

  • 发表日期：

    2025年8月23日

查看全文
  • Jianyou Wang,
  • Zhiheng He,
  • Biao Liu,
  • Peichao Li,
  • Jiaxin Tian,
  • Shouman Chen,
  • Yong Li

摘要

P2-type layered manganese-based oxides are promising cathode candidates for sodium-ion batteries due to their high energy density and low cost. However, their practical application is limited by slow ion kinetics and severe Jahn–Teller distortion. In this study, we address these challenges through surface engineering by applying a 6nm Na3PO4 coating to pre-synthesized P2-Na0.67Ni0.3Mn0.6Co0.1O2 (NMC). The optimized 3 wt% Na3PO4-coated NMC demonstrates remarkable electrochemical performance, delivering specific capacity of 161 mA h g−1 at 0.1 C. Rate capability tests reveal superior performance (61 mA h g−1 at 10 C) compared to the unmodified counterparts. Long-term cycling stability shows capacity retention rates of 90.9% (3 wt%) and 83% (5 wt%) after 100 cycles, significantly outperforming the 53.9% retention of bare NMC. These findings establish Na3PO4 surface modification as an effective strategy for developing high-performance sodium-ion battery cathodes.