Scholarlink

<p>High-capacity anodes are desirable for high-energy lithium-ion batteries but suffer from limited cycle life due to large volume changes during cycling. The LiF-based solid–electrolyte interphase (SEI) has led to prolonged cycling stability. However, current LiF-forming electrolyte designs require anions to enter the Li<sup>+</sup> solvation sheath, which inherently reduces the electrolyte’s ionic conductivity, limiting both fast-charging and low-temperature performance. Here we develop solvent-bridged electrolytes composed of LiPF<sub>6</sub> dissolved in a cosolvent system comprising a bridging cyclic ether that solvates both PF<sub>6</sub><sup>−</sup> and Li<sup>+</sup> to form a LiF-rich SEI, and a structural linear ether that governs the electrolyte liquid range. By mitigating direct Li<sup>+</sup>–anion interactions, the electrolytes maintain high ionic conductivity, enabling stable cycling of micrometre-sized silicon anodes under extreme conditions involving high rates (&gt;4 C), low temperatures (down to −55 °C) and Li plating. Solvent-bridged electrolytes address the intrinsic trade-offs between LiF-rich SEI formation and electrolyte ionic conductivity, offering a promising approach for high-capacity anodes operating under demanding conditions.</p><p></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

Solvent-bridged electrolytes for high-energy Li-ion batteries under extreme conditions

  • 期刊论文

  • 发表日期：

    2026年7月27日

查看全文
  • Yawei Chen,
  • Fanyang Huang,
  • Qiu Zhang,
  • Lei Zheng,
  • Ai-Min Li,
  • Dejian Dong,
  • Kangxuan Xia,
  • Taeyong Lee,
  • Weiran Zhang,
  • Zheng Li,
  • Xin Zhang,
  • Chang-Xin Zhao,
  • Fu Chen,
  • Jiancun Rao,
  • Karen Gaskell,
  • Enyuan Hu,
  • Chunsheng Wang

摘要

High-capacity anodes are desirable for high-energy lithium-ion batteries but suffer from limited cycle life due to large volume changes during cycling. The LiF-based solid–electrolyte interphase (SEI) has led to prolonged cycling stability. However, current LiF-forming electrolyte designs require anions to enter the Li+ solvation sheath, which inherently reduces the electrolyte’s ionic conductivity, limiting both fast-charging and low-temperature performance. Here we develop solvent-bridged electrolytes composed of LiPF6 dissolved in a cosolvent system comprising a bridging cyclic ether that solvates both PF6− and Li+ to form a LiF-rich SEI, and a structural linear ether that governs the electrolyte liquid range. By mitigating direct Li+–anion interactions, the electrolytes maintain high ionic conductivity, enabling stable cycling of micrometre-sized silicon anodes under extreme conditions involving high rates (>4 C), low temperatures (down to −55 °C) and Li plating. Solvent-bridged electrolytes address the intrinsic trade-offs between LiF-rich SEI formation and electrolyte ionic conductivity, offering a promising approach for high-capacity anodes operating under demanding conditions.