Scholarlink

<p>The demand for energy storage devices with both high power and energy density has risen significantly because of growing global environmental concerns. Lithium metal capacitors (LMCs) have emerged as promising candidates for next-generation energy storage systems by addressing the low energy density limitations of conventional electric double-layer capacitors (EDLCs). However, lithium dendrite formation and volume expansion in lithium metal anodes pose major challenges, leading to performance degradation and safety risks. In this study, a three-dimensional nano-perforated graphene (3-D NPG) with SnO₂ composite as an advanced anode material for LMCs. The 3-D NPG improved electrochemical performance by offering a high surface area, reducing local current density, and mitigating volume expansion. Furthermore, the lithiophilicity of SnO₂ facilitated lithium deposition by effectively reducing the lithium nucleation overpotential. The composite exhibited the lowest lithium nucleation overpotential (39.44 mV), along with a superior rate capability and remarkable cycle stability, retaining 88.5% of its capacity after 10,000 cycles at 2&#xa0;A/g. The improved lithium-ion transport and lithiophilicity of the composite significantly suppressed dendritic lithium growth, thereby enhancing the electrochemical performance of LMCs. These results demonstrate the potential of 3-D SnO₂/NPG as a next-generation anode material for high-performance energy storage applications.</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

Three-dimensional structured nanoporous graphene/SnO2-based anode for high-power and high-energy-density lithium metal capacitors

  • 期刊论文

  • 发表日期：

    2026年1月20日

查看全文
  • Chang-Hun Lim,
  • Young Gyu Jeon,
  • Cheol Jin Sa,
  • Young-Hyun Hong,
  • Hyun-Kyung Kim

摘要

The demand for energy storage devices with both high power and energy density has risen significantly because of growing global environmental concerns. Lithium metal capacitors (LMCs) have emerged as promising candidates for next-generation energy storage systems by addressing the low energy density limitations of conventional electric double-layer capacitors (EDLCs). However, lithium dendrite formation and volume expansion in lithium metal anodes pose major challenges, leading to performance degradation and safety risks. In this study, a three-dimensional nano-perforated graphene (3-D NPG) with SnO₂ composite as an advanced anode material for LMCs. The 3-D NPG improved electrochemical performance by offering a high surface area, reducing local current density, and mitigating volume expansion. Furthermore, the lithiophilicity of SnO₂ facilitated lithium deposition by effectively reducing the lithium nucleation overpotential. The composite exhibited the lowest lithium nucleation overpotential (39.44 mV), along with a superior rate capability and remarkable cycle stability, retaining 88.5% of its capacity after 10,000 cycles at 2 A/g. The improved lithium-ion transport and lithiophilicity of the composite significantly suppressed dendritic lithium growth, thereby enhancing the electrochemical performance of LMCs. These results demonstrate the potential of 3-D SnO₂/NPG as a next-generation anode material for high-performance energy storage applications.