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<p>A rechargeable lithium/chlorine (Li/Cl<sub>2</sub>) battery is a promising candidate for energy storage applications. However, the highly corrosive thionyl chloride (SOCl<sub>2</sub>) solvent in the conventional electrolyte has hindered their practical production and application. Here, we discover that methyl chlorodifluoroacetate (MCDFA), a mild ester, can serve as an effective alternative to SOCl<sub>2</sub> to solve the above challenge. The resultant battery using the MCDFA-based electrolyte exhibits a wide operation temperature range from −40 °C to 120 °C, a significant enhancement over conventional rechargeable Li/Cl<sub>2</sub> batteries, and is also competitive among state-of-the-art wide-temperature Li metal batteries. Our results offer an effective strategy to address the corrosivity of the SOCl<sub>2</sub>-based electrolyte in rechargeable Li/Cl<sub>2</sub> batteries, and open a new avenue for practical and sustainable energy storage applications.</p>

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A wide-temperature Li/Cl2 battery using an ester-based electrolyte

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • Bin Yuan,
  • Qiuchen Xu,
  • Shanshan Tang,
  • Shitao Geng,
  • Qianyun Chen,
  • Yan Wang,
  • Xiaoju Zhao,
  • Chengxiao Zhang,
  • Shuo Wang,
  • Zhaofeng Ouyang,
  • Hao Sun

摘要

A rechargeable lithium/chlorine (Li/Cl2) battery is a promising candidate for energy storage applications. However, the highly corrosive thionyl chloride (SOCl2) solvent in the conventional electrolyte has hindered their practical production and application. Here, we discover that methyl chlorodifluoroacetate (MCDFA), a mild ester, can serve as an effective alternative to SOCl2 to solve the above challenge. The resultant battery using the MCDFA-based electrolyte exhibits a wide operation temperature range from −40 °C to 120 °C, a significant enhancement over conventional rechargeable Li/Cl2 batteries, and is also competitive among state-of-the-art wide-temperature Li metal batteries. Our results offer an effective strategy to address the corrosivity of the SOCl2-based electrolyte in rechargeable Li/Cl2 batteries, and open a new avenue for practical and sustainable energy storage applications.