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<p>The development of sustainable energy storage solutions has driven research toward alternatives to lithium-ion batteries. Sodium-ion battery (SIB) was considered a promising candidate due to their cost-effectiveness and sodium abundance. To introduce defects and enhance the electrochemical performance of O3-phase sodium-ion layered oxide materials, high-temperature shock (HTS) was employed. However, given the characteristics of HTS, especially the rapid heating rate and short sintering time, suitable precursor systems need to be explored. We systematically compared three precursor systems: traditional metal oxides (HTS-O), decomposable salts (HTS-D), and a novel pre-reacted precursor system (HTS-S). The pre-reacted precursor, developed by leveraging the ethanol solubility of C<sub>4</sub>H<sub>14</sub>MnO<sub>8</sub> and modified ball milling conditions, enabled rapid O3 phase formation and resulted in impurity-free O3-NaCu<sub>0.2</sub>Fe<sub>0.3</sub>Mn<sub>0.5</sub>O<sub>2</sub>. This material demonstrated superior electrochemical performance, achieving a discharge capacity of 144.05 mAh g<sup>−1</sup> within 2.0–4.1 V, along with enhanced rate capabilities. Our findings underscore the critical role of precursor selection and modification in HTS synthesis, contributing to the advancement of high-performance sodium-ion battery materials.</p>

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A soluble precursor facilitates ultra-fast synthesis of O3 layered oxides for sodium-ion batteries

  • 期刊论文

  • 发表日期：

    2025年5月14日

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  • Chunying Wang,
  • Zekun Li,
  • Zhikai Miao,
  • Haoran Jiang,
  • Jiawei Luo,
  • Jingchao Zhang,
  • Zhedong Liu,
  • Zhaoxin Guo,
  • Rui Liu,
  • Siliang Liu,
  • Yanan Chen

摘要

The development of sustainable energy storage solutions has driven research toward alternatives to lithium-ion batteries. Sodium-ion battery (SIB) was considered a promising candidate due to their cost-effectiveness and sodium abundance. To introduce defects and enhance the electrochemical performance of O3-phase sodium-ion layered oxide materials, high-temperature shock (HTS) was employed. However, given the characteristics of HTS, especially the rapid heating rate and short sintering time, suitable precursor systems need to be explored. We systematically compared three precursor systems: traditional metal oxides (HTS-O), decomposable salts (HTS-D), and a novel pre-reacted precursor system (HTS-S). The pre-reacted precursor, developed by leveraging the ethanol solubility of C4H14MnO8 and modified ball milling conditions, enabled rapid O3 phase formation and resulted in impurity-free O3-NaCu0.2Fe0.3Mn0.5O2. This material demonstrated superior electrochemical performance, achieving a discharge capacity of 144.05 mAh g−1 within 2.0–4.1 V, along with enhanced rate capabilities. Our findings underscore the critical role of precursor selection and modification in HTS synthesis, contributing to the advancement of high-performance sodium-ion battery materials.