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Multifunctional high-fluorine-content molecule with high dipole moment as electrolyte additive for high performance lithium metal batteries

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摘要

锂金属电池被认为是目前替代锂离子电池最有前途的技术, 可以满足下一代高能量和高功率二次电池技术的需求。然而, 诸如电解液电化学稳定性差、枝晶的生长、正极电极材料结构随着电化学循环的破坏以及由此导致的库仑效率低和循环寿命短等挑战, 一直困扰着锂金属电池的商业化推广。有鉴于此, 马建民和他的同事们设计了一种高氟含量和高偶极矩分子的双氟乙酰胺, 作为锂金属电池的电解液添加剂。该分子可以改变锂离子的溶剂化结构, 调控锂离子的吸附与扩散, 并在其他碳酸盐溶剂分解前, 于负极上形成梯度的固液电解质膜。该方法可实现锂金属负极在电化学循环过程中无枝晶产生, 且电池具有长的循环寿命和优异的倍率性能。这项工作探索了一种新的多功能电解质添加剂, 同时该添加剂也可以适用于其他金属电池化学。

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Fig.1

Reproduced with permission from Ref. [18]. Copyright 2020, Wiley–VCH GmbH

Fig. 2

Reproduced with permission from Ref. [18]. Copyright 2020, Wiley–VCH GmbH

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Author notes

  1. Wen-Chao Zhang and Liu-Yue Cao contributed equally to this work.

Authors and Affiliations

  1. Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha, 410083, China

    Xi Tang & Wen-Chao Zhang

  2. School of Chemical and Biomolecular Engineering, the University of Sydney, Darlington, NSW, 2006, Australia

    Liu-Yue Cao

Authors
  1. Xi Tang
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  2. Wen-Chao Zhang
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  3. Liu-Yue Cao
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Correspondence to Wen-Chao Zhang or Liu-Yue Cao.

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Tang, X., Zhang, WC. & Cao, LY. Multifunctional high-fluorine-content molecule with high dipole moment as electrolyte additive for high performance lithium metal batteries. Rare Met. 41, 726–729 (2022). https://doi.org/10.1007/s12598-021-01843-9

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  • DOI: https://doi.org/10.1007/s12598-021-01843-9

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