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<p>Aqueous zinc-ion batteries (AZIBs) emerge as strong candidates for large-scale energy storage due to their high safety and low cost, yet their application is severely constrained by dendrite growth and side reactions at the zinc anode. This study introduces nanosized barium titanate (BTO) and graphene (Gr) onto the zinc anode surface via electrochemical deposition to optimize the interfacial electric field distribution and provide nucleation sites, thereby synergistically suppressing dendrite growth and side reactions. The results indicate that at a BTO loading of 0.6&#xa0;g/L, the composite zinc anode exhibits excellent cycling stability in symmetric cells, achieving stable cycling for 350&#xa0;h at 5&#xa0;mA/cm<sup>2</sup> and 450&#xa0;h at 2&#xa0;mA/cm<sup>2</sup>. Further addition of 0.04&#xa0;g/L Gr enables uniform zinc-ion deposition along the (002) crystal plane, enabling the symmetric cell to achieve stable cycling for 300&#xa0;h at 5&#xa0;mA/cm<sup>2</sup> and 400&#xa0;h at 2&#xa0;mA/cm<sup>2</sup>. The assembled symmetric cell exhibits lower voltage hysteresis and longer cycling performance compared to the bare zinc electrode. Moreover, the full cell assembled with Zn-BTO-Gr anodes maintained a coulombic efficiency of 99.81% after 1500 cycles at 1&#xa0;A/g. Electrochemical testing reveals that incorporating BTO and Gr significantly reduces charge transfer resistance and hydrogen evolution overpotential, enhancing the cell’s rate capability and cycling stability. This study provides new insights for designing high-performance zinc anodes.</p>

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Nanobarium titanate/graphene zinc anodes synergistically regulated by uniform electric fields and induced nucleation enable high-performance aqueous zinc-ion batteries

  • 期刊论文

  • 发表日期：

    2026年4月11日

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  • Yuning Sun,
  • Qiaoying Li,
  • Jinjian Lv,
  • You Li,
  • Changzheng Hu

摘要

Aqueous zinc-ion batteries (AZIBs) emerge as strong candidates for large-scale energy storage due to their high safety and low cost, yet their application is severely constrained by dendrite growth and side reactions at the zinc anode. This study introduces nanosized barium titanate (BTO) and graphene (Gr) onto the zinc anode surface via electrochemical deposition to optimize the interfacial electric field distribution and provide nucleation sites, thereby synergistically suppressing dendrite growth and side reactions. The results indicate that at a BTO loading of 0.6 g/L, the composite zinc anode exhibits excellent cycling stability in symmetric cells, achieving stable cycling for 350 h at 5 mA/cm2 and 450 h at 2 mA/cm2. Further addition of 0.04 g/L Gr enables uniform zinc-ion deposition along the (002) crystal plane, enabling the symmetric cell to achieve stable cycling for 300 h at 5 mA/cm2 and 400 h at 2 mA/cm2. The assembled symmetric cell exhibits lower voltage hysteresis and longer cycling performance compared to the bare zinc electrode. Moreover, the full cell assembled with Zn-BTO-Gr anodes maintained a coulombic efficiency of 99.81% after 1500 cycles at 1 A/g. Electrochemical testing reveals that incorporating BTO and Gr significantly reduces charge transfer resistance and hydrogen evolution overpotential, enhancing the cell’s rate capability and cycling stability. This study provides new insights for designing high-performance zinc anodes.