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An in situ formed LiF protective layer on a Li metal anode with solvent-less cross-linking
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-05-02 , DOI: 10.1039/d0se00357c Hyunjin Kim 1, 2, 3, 4, 5 , Youn Sang Kim 1, 2, 3, 4, 5 , Jeeyoung Yoo 5, 6, 7, 8
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-05-02 , DOI: 10.1039/d0se00357c Hyunjin Kim 1, 2, 3, 4, 5 , Youn Sang Kim 1, 2, 3, 4, 5 , Jeeyoung Yoo 5, 6, 7, 8
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Lithium metal is considered the most promising anode material because of its highest theoretical capacity and lowest electrode potential among the candidate materials. However, Li metal batteries have not been commercialized yet owing to their poor cycle stability. To solve this problem, many studies have reported that the addition of chemically stable LiF to the artificial solid electrolyte interphase (SEI) layer can effectively inhibit the low irreversibility of and dendrite growth on Li metal. However, this measure is inadequate for achieving the desired performance, and it introduces difficulties in the fabrication process. This study employs an in situ LiF protective layer (PL) to stabilize the surface of Li metal. This artificial SEI layer that includes LiF can be fabricated simply through thermal curing of an F-rich material on the surface of Li metal. This “in situ LiF PL” effectively prevents volume expansion of Li metal, resulting in a capacity retention of 52.1% after 1000 cycles at 5.0C. The proposed artificial SEI layer design offers an alternative strategy for stabilizing the surface of Li metal.
中文翻译：
无溶剂交联的锂金属阳极上原位形成的LiF保护层
锂金属被认为是最有希望的阳极材料，因为在候选材料中其最高的理论容量和最低的电极电位。但是，锂金属电池由于其循环稳定性差而尚未商业化。为了解决这个问题，许多研究报告说，在人造固体电解质中间相（SEI）层中添加化学稳定的LiF可以有效地抑制Li金属的低不可逆性和枝晶生长。然而，该措施不足以实现期望的性能，并且在制造过程中引入了困难。本研究采用原位LiF保护层（PL），用于稳定Li金属的表面。这种包含LiF的人造SEI层可以简单地通过在Li金属表面上热固化富F材料来制造。这种“原位LiF PL”有效地防止了锂金属的体积膨胀，在5.0C下经过1000次循环后，容量保持率为52.1％。拟议的人工SEI层设计为稳定锂金属的表面提供了另一种策略。
更新日期：2020-06-30
中文翻译：
无溶剂交联的锂金属阳极上原位形成的LiF保护层
锂金属被认为是最有希望的阳极材料，因为在候选材料中其最高的理论容量和最低的电极电位。但是，锂金属电池由于其循环稳定性差而尚未商业化。为了解决这个问题，许多研究报告说，在人造固体电解质中间相（SEI）层中添加化学稳定的LiF可以有效地抑制Li金属的低不可逆性和枝晶生长。然而，该措施不足以实现期望的性能，并且在制造过程中引入了困难。本研究采用原位LiF保护层（PL），用于稳定Li金属的表面。这种包含LiF的人造SEI层可以简单地通过在Li金属表面上热固化富F材料来制造。这种“原位LiF PL”有效地防止了锂金属的体积膨胀，在5.0C下经过1000次循环后，容量保持率为52.1％。拟议的人工SEI层设计为稳定锂金属的表面提供了另一种策略。
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