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Lithium Metal Anodes with an Adaptive “Solid-Liquid” Interfacial Protective Layer
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2017-03-24 , DOI: 10.1021/jacs.6b13314 Kai Liu , Allen Pei , Hye Ryoung Lee , Biao Kong , Nian Liu , Dingchang Lin , Yayuan Liu , Chong Liu , Po-chun Hsu , Zhenan Bao , Yi Cui 1
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2017-03-24 , DOI: 10.1021/jacs.6b13314 Kai Liu , Allen Pei , Hye Ryoung Lee , Biao Kong , Nian Liu , Dingchang Lin , Yayuan Liu , Chong Liu , Po-chun Hsu , Zhenan Bao , Yi Cui 1
Affiliation
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Lithium metal is an attractive anode for the next generation of high energy density lithium-ion batteries due to its high specific capacity (3,860 mAh g-1) and lowest overall anode potential. However, the key issue is that the static solid electrolyte interphase cannot match the dynamic volume changes of the Li anode, resulting in side reactions, dendrite growth, and poor electrodeposition behavior, which prevent its practical applications. Here, we show that the "solid-liquid" hybrid behavior of a dynamically cross-linked polymer enables its use as an excellent adaptive interfacial layer for Li metal anodes. The dynamic polymer can reversibly switch between its "liquid" and "solid" properties in response to the rate of lithium growth to provide uniform surface coverage and dendrite suppression, respectively, thereby enabling the stable operation of lithium metal electrodes. We believe that this example of engineering an adaptive Li/electrolyte interface brings about a new and promising way to address the intrinsic problems of lithium metal anodes.
中文翻译：
具有自适应“固液”界面保护层的锂金属阳极
由于其高比容量 (3,860 mAh g-1) 和最低的总体阳极电位，锂金属是下一代高能量密度锂离子电池的有吸引力的阳极。然而，关键问题是静态固体电解质界面不能匹配锂负极的动态体积变化，导致副反应、枝晶生长和电沉积行为不良，阻碍了其实际应用。在这里，我们展示了动态交联聚合物的“固-液”混合行为使其可用作锂金属负极的优异自适应界面层。动态聚合物可以响应锂的生长速率在其“液体”和“固体”性质之间可逆地切换，以分别提供均匀的表面覆盖和枝晶抑制，从而实现锂金属电极的稳定运行。我们相信，这个设计自适应锂/电解质界面的例子为解决锂金属负极的内在问题带来了一种新的、有前途的方法。
更新日期：2017-03-24
中文翻译：
具有自适应“固液”界面保护层的锂金属阳极
由于其高比容量 (3,860 mAh g-1) 和最低的总体阳极电位，锂金属是下一代高能量密度锂离子电池的有吸引力的阳极。然而，关键问题是静态固体电解质界面不能匹配锂负极的动态体积变化，导致副反应、枝晶生长和电沉积行为不良，阻碍了其实际应用。在这里，我们展示了动态交联聚合物的“固-液”混合行为使其可用作锂金属负极的优异自适应界面层。动态聚合物可以响应锂的生长速率在其“液体”和“固体”性质之间可逆地切换，以分别提供均匀的表面覆盖和枝晶抑制，从而实现锂金属电极的稳定运行。我们相信，这个设计自适应锂/电解质界面的例子为解决锂金属负极的内在问题带来了一种新的、有前途的方法。
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