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<p>Li-metal batteries with solid oxide electrolytes have garnered increasing attention as promising technologies that can overcome the safety and energy density limits of lithium-ion batteries (LIBs). However, the less than satisfactory long-term stability of Li-metal batteries—a consequence of Li dendrite formation caused by unstable Li plating/stripping at the interface between the Li metal and solid electrolyte—is hampering their commercialisation. Herein, we propose an negative electrode multilayer consisting of porous Te and carbon-based layers that can suppress Li dendrite formation and significantly lower the degree of capacity decay during long-term cycling. A quasi-all-solid-state Li-metal battery fabricated using Li<sub>6.4</sub>La<sub>3</sub>Zr<sub>1.7</sub>Ta<sub>0.3</sub>O<sub>12</sub> (LLZTO), a Te/Ag-C anodenegative electrode interlayer, and a LiNi<sub>0.8</sub>Co<sub>0.1</sub>Al<sub>0.1</sub>O<sub>2</sub> (NCA811) positive electrode impregnated with an ion-conducting liquid demonstrated high capacity retention (80.1% over 4000 cycles) and Coulombic efficiency (99.7%) when operated at a high current density of 2.2 mA/cm<sup>2</sup> at 25 °C. Furthermore, we successfully demonstrate 100-mAh-level single cells in a pouch cell configuration using a large-area (36 cm<sup>2</sup>) LLZTO solid electrolyte and a 3.2-mAh/cm<sup>2</sup> LiCoO<sub>2</sub> (LCO) positive electrode capable of operating for &gt;400 cycles at a 0.5 C-rate (85 mA/g).</p>

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A porous tellurium interlayer for high-power and long-cycling garnet-based quasi-solid-state lithium-metal batteries

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月13日

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  • Ju-Sik Kim,
  • Gabin Yoon,
  • Yong Su Kim,
  • Tae-Hee Kim,
  • Sewon Kim,
  • Jirae Kim,
  • Junhyeong Lee,
  • Ryounghee Kim,
  • Myung-Jin Lee,
  • Nobuyoshi Yashiro,
  • Shinya Suzuki,
  • Tetsuya Asano,
  • Michael Badding,
  • Zhen Song,
  • Sung Heo

摘要

Li-metal batteries with solid oxide electrolytes have garnered increasing attention as promising technologies that can overcome the safety and energy density limits of lithium-ion batteries (LIBs). However, the less than satisfactory long-term stability of Li-metal batteries—a consequence of Li dendrite formation caused by unstable Li plating/stripping at the interface between the Li metal and solid electrolyte—is hampering their commercialisation. Herein, we propose an negative electrode multilayer consisting of porous Te and carbon-based layers that can suppress Li dendrite formation and significantly lower the degree of capacity decay during long-term cycling. A quasi-all-solid-state Li-metal battery fabricated using Li6.4La3Zr1.7Ta0.3O12 (LLZTO), a Te/Ag-C anodenegative electrode interlayer, and a LiNi0.8Co0.1Al0.1O2 (NCA811) positive electrode impregnated with an ion-conducting liquid demonstrated high capacity retention (80.1% over 4000 cycles) and Coulombic efficiency (99.7%) when operated at a high current density of 2.2 mA/cm2 at 25 °C. Furthermore, we successfully demonstrate 100-mAh-level single cells in a pouch cell configuration using a large-area (36 cm2) LLZTO solid electrolyte and a 3.2-mAh/cm2 LiCoO2 (LCO) positive electrode capable of operating for >400 cycles at a 0.5 C-rate (85 mA/g).