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<p>Lithium metal batteries (LMBs) have emerged as a cornerstone of next-generation energy storage technologies due to their high energy density. However, practical applications are hindered by lithium dendrite growth and volume expansion at the lithium metal anodes (LMAs). To address these challenges, this study develops a novel current collector (Cu<sub>2</sub>O/etched brass [EB]) integrating a three-dimensional (3D) porous brass framework (EB) with a lithiophilic Cu<sub>2</sub>O layer, achieving synergistic structural and interfacial regulation. The 3D porous architecture mitigates local current density and accommodates volume expansion, while the Cu<sub>2</sub>O layer enables low nucleation overpotential for homogeneous lithium deposition, thereby lowering the charge transfer resistance and effectively suppressing the formation of lithium dendrites and dead lithium. The assembled Cu<sub>2</sub>O/EB-300@Li||LiFePO<sub>4</sub> full cell demonstrates 95% capacity retention with 99.1% coulombic efficiency (CE) after 300 cycles, along with high-rate capability. This work provides an innovative strategy for achieving high-energy-density and long-cycling LMBs.</p>

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Synergistic Design of 3D Architecture and Cu2O Interface Engineering for Dendrite-free Lithium Metal Anodes

  • 期刊论文

  • 发表日期：

    2026年1月22日

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  • Wenyu Liao,
  • Xuanting Guo,
  • Xinyu Shen,
  • Qinqin Xiong,
  • Xiaoshi Hu,
  • Haiying Qin

摘要

Lithium metal batteries (LMBs) have emerged as a cornerstone of next-generation energy storage technologies due to their high energy density. However, practical applications are hindered by lithium dendrite growth and volume expansion at the lithium metal anodes (LMAs). To address these challenges, this study develops a novel current collector (Cu2O/etched brass [EB]) integrating a three-dimensional (3D) porous brass framework (EB) with a lithiophilic Cu2O layer, achieving synergistic structural and interfacial regulation. The 3D porous architecture mitigates local current density and accommodates volume expansion, while the Cu2O layer enables low nucleation overpotential for homogeneous lithium deposition, thereby lowering the charge transfer resistance and effectively suppressing the formation of lithium dendrites and dead lithium. The assembled Cu2O/EB-300@Li||LiFePO4 full cell demonstrates 95% capacity retention with 99.1% coulombic efficiency (CE) after 300 cycles, along with high-rate capability. This work provides an innovative strategy for achieving high-energy-density and long-cycling LMBs.