Tuning wettability of molten lithium via a chemical strategy for lithium metal anodes.,Nature Communications

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Tuning wettability of molten lithium via a chemical strategy for lithium metal anodes.
Nature Communications ( IF 14.7 ) Pub Date : 2019-10-30 , DOI: 10.1038/s41467-019-12938-4
Shu-Hua Wang ₁ , Junpei Yue ₁ , Wei Dong _{1,

2} , Tong-Tong Zuo _{1,

2} , Jin-Yi Li _{1,

2} , Xiaolong Liu ₁ , Xu-Dong Zhang _{1,

2} , Lin Liu _{1,

2} , Ji-Lei Shi _{1,

2} , Ya-Xia Yin _{1,

2} , Yu-Guo Guo _{1,

2}

Affiliation

Metallic lithium affords the highest theoretical capacity and lowest electrochemical potential and is viewed as a leading contender as an anode for high-energy-density rechargeable batteries. However, the poor wettability of molten lithium does not allow it to spread across the surface of lithiophobic substrates, hindering the production and application of this anode. Here we report a general chemical strategy to overcome this dilemma by reacting molten lithium with functional organic coatings or elemental additives. The Gibbs formation energy and newly formed chemical bonds are found to be the governing factor for the wetting behavior. As a result of the improved wettability, a series of ultrathin lithium of 10-20 μm thick is obtained together with impressive electrochemical performance in lithium metal batteries. These findings provide an overall guide for tuning the wettability of molten lithium and offer an affordable strategy for the large-scale production of ultrathin lithium, and could be further extended to other alkali metals, such as sodium and potassium.

中文翻译：

通过化学策略来调整锂金属阳极的熔融锂润湿性。

金属锂具有最高的理论容量和最低的电化学势，并且被视为高能量密度可充电电池阳极的主要竞争者。然而，熔融锂的差的润湿性不允许其散布在疏油性基材的表面上，从而阻碍了该阳极的生产和应用。在这里，我们报告了一种一般的化学策略，可以通过使熔融锂与功能性有机涂层或元素添加剂反应来克服这一难题。发现吉布斯形成能和新形成的化学键是润湿行为的决定因素。由于改善的润湿性，在锂金属电池中获得了一系列10-20μm厚的超薄锂以及令人印象深刻的电化学性能。

更新日期：2019-10-30

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