Scholarlink

<p>Fast charging and low-temperature operation are essential for next-generation energy storage. However, high-energy batteries struggle to meet these demands as existing electrolytes cannot simultaneously deliver fast interfacial kinetics, high ionic conductivity and favourable interphase formation. Prevailing strategies focus on weakening thermodynamic solvation, yet this approach does not directly address the kinetic bottleneck, that is, the desolvation barrier governing interfacial charge transfer. Here we reveal that the desolvation kinetics are dictated by dynamic solvent exchange rather than thermodynamic solvation energy. Guided by this mechanistic insight, we have formulated an electrolyte in which two anions carry distinct anionic potentials: high-anionic-potential anions form contact ion pairs that accelerate solvation-exchange kinetics, while low-anionic-potential anions form solvent-separated ion pairs that sustain high bulk ionic conductivity. The electrolyte enables fast charging and low-temperature operation in high-loading lithium-ion batteries. The design principle was further validated in aqueous aluminium-ion electrochemical systems, underscoring its broader relevance to sustainable, resource-abundant battery chemistries beyond the lithium ion. Together, our findings establish a new electrolyte design paradigm that decouples interfacial and bulk transport properties and expands the design space of battery electrolyte systems.</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

Dynamic solvent exchange for fast-charging lithium batteries and beyond

  • 期刊论文

  • 发表日期：

    2026年6月23日

查看全文
  • Chang-Xin Zhao,
  • Zheng Li,
  • Daoning Zhang,
  • Nan Zhang,
  • Qiu Zhang,
  • Zeyi Wang,
  • Yue Li,
  • Yawei Chen,
  • Chunsheng Wang

摘要

Fast charging and low-temperature operation are essential for next-generation energy storage. However, high-energy batteries struggle to meet these demands as existing electrolytes cannot simultaneously deliver fast interfacial kinetics, high ionic conductivity and favourable interphase formation. Prevailing strategies focus on weakening thermodynamic solvation, yet this approach does not directly address the kinetic bottleneck, that is, the desolvation barrier governing interfacial charge transfer. Here we reveal that the desolvation kinetics are dictated by dynamic solvent exchange rather than thermodynamic solvation energy. Guided by this mechanistic insight, we have formulated an electrolyte in which two anions carry distinct anionic potentials: high-anionic-potential anions form contact ion pairs that accelerate solvation-exchange kinetics, while low-anionic-potential anions form solvent-separated ion pairs that sustain high bulk ionic conductivity. The electrolyte enables fast charging and low-temperature operation in high-loading lithium-ion batteries. The design principle was further validated in aqueous aluminium-ion electrochemical systems, underscoring its broader relevance to sustainable, resource-abundant battery chemistries beyond the lithium ion. Together, our findings establish a new electrolyte design paradigm that decouples interfacial and bulk transport properties and expands the design space of battery electrolyte systems.